Benisty, M., Natta, A., Isella, A., Berger, J-P., Massi, F., LeBouquin, J-B., ...
We present new long-baseline spectro-interferometric observations of the HerbigAe star HD163296 obtained in the H and K bands with the AMBER instrument at VLTI. The observations cover a range of...
Kraus, S., Malbet, F., Meilland, A., Natta, A., Schertl, D., ...
Models predict that in the innermost AU of the disk around Herbig Ae/Be star, the dust disk forms a "puffed-up" inner rim, which should result in a strongly asymmetric brightness distribution for...
Driebe, T., Groh, J. H., Ohnaka, K., Kraus, S., Millour, F., ...
We obtained near-infrared long-baseline interferometry of IRC+10420 with the AMBER instrument of ESO's Very Large Telescope Interferometer (VLTI) in low and high spectral resolution (HR) mode to...
Ohnaka, K., Benisty, M., Chelli, A., Driebe, T., Millour, F., ...
We present spatially resolved high-spectral resolution K-band observations of the red supergiant Betelgeuse (alpha Ori) using AMBER at the Very Large Telescope Interferometer (VLTI). Betelgeuse was...
A new spectroscopic and interferometric study of the young stellar object V645 Cyg (2009)
Miroshnichenko, A. S., Schertl, D., Weigelt, G., Kraus, S., Manset, N., ...
We present the results of high-resolution optical spectroscopy, low-resolution near-IR spectroscopy and near-infrared speckle interferometry of the massive young stellar object candidate V645 Cyg,...
Kraus, S., Weigelt, G., Balega, Y. Y., Docobo, J. A., Preibisch, T., ...
The nearby high-mass star binary system Theta 1 Orionis C is the brightest and most massive of the Trapezium OB stars at the core of the Orion Nebula Cluster, and it represents a perfect laboratory...
MATISSE, perspective of imaging in the mid-infrared at the VLTI (2009)
Lopez, B., Antonelli, P., Wolf, S., Lagarde, S., Jaffe, W., Navarro, R., ...
MATISSE is foreseen as a mid-infrared spectro-interferometer combining the beams of up to four UTs/ATs of the Very Large Telescope Interferometer (VLTI) of the European Southern Observatory. The...
MATISSE, perspective of imaging in the mid-infrared at the VLTI (2009)
Lopez, B., Antonelli, P., Wolf, S., Lagarde, S., Jaffe, W., Navarro, R., ...
MATISSE is foreseen as a mid-infrared spectro-interferometer combining the beams of up to four UTs/ATs of the Very Large Telescope Interferometer (VLTI) of the European Southern Observatory. The...
Milli-arcsecond Astrophysics with VSI, the VLTI Spectro-imager in the ELT Era (2009)
Malbet, F, Buscher, D, Weigelt, G, Garcia, P, Gai, M, Lorenzetti, D, ...
Nowadays, compact sources relatively warm like surfaces of nearby stars, circumstellar environments of stars from early stages to the most evolved ones and surroundings of active galactic nuclei can...
Milli-arcsecond Astrophysics with VSI, the VLTI Spectro-imager in the ELT Era (2009)
Malbet, F., Buscher, D., Weigelt, G., Garcia, P., Gai, M., Lorenzetti, D., ...
Nowadays, compact sources relatively warm like surfaces of nearby stars, circumstellar environments of stars from early stages to the most evolved ones and surroundings of active galactic nuclei can...
Kraus, S., Benisty, M., Chesneau, O., Isella, A., ...
Context. Accretion and outflow processes are of fundamental importance for our understanding of the formation of stars and planetary systems. To trace these processes, diagnostic spectral lines such...
Optical configuration and analysis of the AMBER/VLTI instrument (2008)
Robbe-Dubois, S., Lagarde, S., Petrov, R. G., Lisi, F., Beckmann, U., Antonelli, P., ...
This paper describes the design goals and engineering efforts that led to the realization of AMBER (Astronomical Multi BEam combineR) and to the achievement of its present performance. On the basis...
System overview of the VLTI Spectro-Imager (2008)
Jocou, L., Berger, J. P., Malbet, F., Kern, P., Beckmann, U., Lorenzetti, D., ...
The VLTI Spectro Imager project aims to perform imaging with a temporal resolution of 1 night and with a maximum angular resolution of 1 milliarcsecond, making best use of the Very Large Telescope...
VSI: the VLTI spectro-imager (2008)
Malbet, F., Buscher, D., Weigelt, G., Garcia, P., Gai, M., Lorenzetti, D., ...
The VLTI Spectro Imager (VSI) was proposed as a second-generation instrument of the Very Large Telescope Interferometer providing the ESO community with spectrally-resolved, near-infrared images at...
Kraus, S., Benisty, M., Chesneau, O., Isella, A., ...
To trace the accretion and outflow processes around YSOs, diagnostic spectral lines such as the BrG 2.166 micron line are widely used, although due to a lack of spatial resolution, the origin of the...
VSI: the VLTI spectro-imager (2008)
Malbet, F, Buscher, D, Weigelt, G, Garcia, P, Gai, M, Lorenzetti, D, ...
Optical and Infrared Interferometry.
Eckart, A., Glindemann, A., Kraus, S., Schodel, R., Ghez, A. M., ...
Investigating the environment of the massive black hole SgrA* at the center of the Galaxy requires the highest angular resolution available to avoid source confusion and to study the physical...
Discovery of a strong Baldwin effect in mid-infrared AGN lines (2008)
Hoenig, S. F., Smette, A., Beckert, T., Horst, H., Duschl, W., Gandhi, P., ...
We present the discovery of a Baldwin effect in 8 nearby Seyfert galaxies for the three most prominent mid-infrared forbidden emission lines observable from the ground that are commonly found in AGN,...
Instrument Science Report (2008)
Idt R. Albrecht, C. Barbieri, A. Boksenberg, P. Crane, J. M. Deharveng, ...
Analysis of the Cycle 3 DQE program for f/96 indicates that the f/96 relay has lost about 5% of its sensitivity over two years. Otherwise, no evidence is seen for any change in the shape of the DQE...
Milli-arcsecond astrophysics with VSI, the VLTI spectro-imager in the ELT era (2008)
Malbet, F., Buscher, D., Weigelt, G., Garcia, P., Gai, M., Lorenzetti, D., ...
Nowadays, compact sources like surfaces of nearby stars, circumstellar environments of stars from early stages to the most evolved ones and surroundings of active galactic nuclei can be investigated...
First AMBER/VLTI Observations of Hot Massive Stars (2008)
Petrov, R. G., Millour, F., Chesneau, O., Weigelt, G., Bonneau, D., Stee, Ph., ...
AMBER is the first near infrared focal instrument of the VLTI. It combines three telescopes and produces spectrally resolved interferometric measures. This paper discusses some preliminary results of...
Milli-arcsecond astrophysics with VSI, the VLTI spectro-imager in the ELT era (2008)
Malbet, F., Buscher, D., Weigelt, G., Garcia, P., Gai, M., Lorenzetti, D., ...
Nowadays, compact sources like surfaces of nearby stars, circumstellar environments of stars from early stages to the most evolved ones and surroundings of active galactic nuclei can be investigated...
Milli-arcsecond astrophysics with VSI, the VLTI spectro-imager in the ELT era (2008)
Malbet, F., Buscher, D., Weigelt, G., Garcia, P., Gai, M., Lorenzetti, D., ...
Nowadays, compact sources like surfaces of nearby stars, circumstellar environments of stars from early stages to the most evolved ones and surroundings of active galactic nuclei can be investigated...
First AMBER/VLTI Observations of Hot Massive Stars (2008)
Petrov, R. G., Millour, F., Chesneau, O., Weigelt, G., Bonneau, D., Stee, Ph., ...
AMBER is the first near infrared focal instrument of the VLTI. It combines three telescopes and produces spectrally resolved interferometric measures. This paper discusses some preliminary results of...
The laser guide star program for the LBT (2008)
Rabien, S., Ageorges, N., Angel, R., Brusa, G., Brynnel, J., Busoni, L., ...
The laser guide star program for the LBT (2008)
Rabien, S., Ageorges, N., Angel, R., Brusa, G., Brynnel, J., Busoni, L., ...
Laser guide star adaptive optics and interferometry are currently revolutionizing ground-based near-IR astronomy, as demonstrated at various large telescopes. The Large Binocular Telescope from the...
The circumstellar environment of evolved stars as seen by VLTI/MIDI (2008)
Ohnaka, K., Bergeat, J., Driebe, T., Graser, U., Hofmann, K. H., Köhler, R., ...
We present the results of the first mid-infrared interferometric observations of the Mira variable RRSco with the VLTI/MIDI, together with K-band observations using VLTI/VINCI.The uniform-disk...
Asymmetric silicate dust distribution toward the silicate carbon star BM Geminorum (2008)
Ohnaka, K., Izumiura, H., Leinert, Ch, Driebe, T., Weigelt, G., Wittkowski, M.
Context: Despite their carbon-rich photospheres, silicate carbon stars show 10 mum silicate emission. They are considered to have circumbinary or circum-companion disks, which serve as a reservoir of...
APerture synthesis in the MID-infrared with the VLTI (2008)
Lopez, B., Wolf, S., Duguée, M., Graser, U., Mathias, Ph, Antonelli, P., ...
Our objective is to develop of the mid-infrared imaging for the VLTI. Several areas of astrophysics will benefit of this new capability. APreS-MIDI comprises a beam combiner which interfaces with the...
MATISSE: perspective of imaging in the mid-infrared at the VLTI (2008)
Lopez, B., Antonelli, P., Wolf, S., Lagarde, S., Jaffe, W., Navarro, R., ...
MATISSE is foreseen as a mid-infrared spectro-interferometer combining the beams of up to four UTs/ATs of the Very Large Telescope Interferometer (VLTI) of the European Southern Observatory. The...
LINC-NIRVANA: achieving 10 mas imagery on the Large Binocular Telescope (2008)
Herbst, T. M., Ragazzoni, R., Eckart, A., Weigelt, G.
LINC-NIRVANA is an innovative imaging interferometer fed by dedicated multi-conjugated adaptive optics systems. The instrument combines the light of the two, 8.4-meter primary mirrors of the Large...
LINC-NIRVANA: the Fizeau interferometer for the Large Binocular Telescope (2008)
Herbst, T. M., Ragazzoni, R., Eckart, A., Weigelt, G.
LINC-NIRVANA is an innovative imaging interferometer fed by dedicated multi-conjugated adaptive optics systems. The instrument combines the light of the two, 8.4-meter primary mirrors of the Large...
Driebe, T., Riechers, D., Balega, Y. Y., Hofmann, K. H., Men'shchikov, A. B., Weigelt, G.
We present near-infrared speckle interferometry of the OH/IR star OH 26.5+0.6 in the K' band obtained with the 6m telescope of the Special Astrophysical Observatory (SAO) in Oct. 2003. At a...
Eta Car through the Eyes of Interferometers (2008)
Chesneau, O., Boekel, R. Van, Herbst, T., Kervella, P., Min, M., ...
The core of the nebula surrounding Eta Carinae has recently been observed with VLT/NACO, VLTI/VINCI, VLTI/MIDI and VLTI/AMBER in order to spatially and spectrally constrain the warm dusty environment...
Speckle Interferometry of Nearby Multiple Stars. IV. Measurements in 2004 and New Orbits (2007)
Balega, I. I., Balega, Yu. Yu., Maksimov, A. F., Malogolovets, E. V., Rastegaev, D. A., Shkhagosheva, Z. U., ...
The results of speckle interferometric observations of 104 binary and 6 triple stars performed at the BTA 6 m telescope in 2004 October are presented. Nearby low-mass stars are mostly observed for...
The Photometric Accuracy Of The FOC (2007)
Date February, Idt R. Albrecht, C. Barbieri, A. Boksenberg, P. Crane, J. M. Deharveng, ...
A comparison is made between the expected photometric accuracy of the FOC, and that observed. The presently known systematic effects are listed and quantified. Typically when both internal and...
Speckle Masking Imaging Of The Spectroscopic Binaries Gliese 150.2 And 41 Draconis (2007)
Y. Balega, H. Falcke, R. Osterbart, M. Schöller, G. Weigelt
Introduction Despite a history of micrometric observations dating back more than 150 years, and many decades of astrometric and interferometric study of lowmass main sequence binary stars in the...
Instrument Science Report (2007)
Idt R. Albrecht, C. Barbieri, A. Boksenberg, P. Crane, J. M. Deharveng, ...
Observations of NGC 5272 were made with the polarizing filters to determine the shifts that those filters introduce. The POL0 and POL120 images are nearly in the same position, but POL60 is shifted...
GJ 900: A new hierarchical system with low-mass components (2007)
Malogolovets, E. V., Balega, Yu. Yu., Rastegaev, D. A., Weigelt, G.
Speckle interferometric observations made with the 6 m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences in 2000 revealed the triple nature of the nearby...
Kraus, S., Balega, Y. Y., Millan-Gabet, R., Monnier, J. D., ...
Located in the Orion Trapezium cluster, Theta 1 Orionis C is one of the youngest and nearest high-mass stars (O5-O7) and also known to be a close binary system. Using new multi-epoch visual and...
Ohnaka, Keiichi, Driebe, T., Weigelt, G., Wittkowski, M.
We present the first multi-epoch N-band spectro-interferometric observations of the carbon-rich Mira variable V Oph using MIDI at the ESO's Very Large Telescope Interferometer. Our MIDI observations...
Direct constraint on the distance of Gamma2 Velorum from AMBER/VLTI observations. (2007)
Millour, F., G. Petrov, R., Chesneau, O., Bonneau, D., Dessart, L., Bechet, C., ...
In this work, we present the first AMBER observations, of the Wolf-Rayet and O (WR+O) star binary system y² Velorum. The AMBER instrument was used with the telescopes UT2, UT3, and UT4 on baselines...
Direct constraint on the distance of Gamma2 Velorum from AMBER/VLTI observations. (2007)
Millour, F., G. Petrov, R., Chesneau, O., Bonneau, D., Dessart, L., Bechet, C., ...
In this work, we present the first AMBER observations, of the Wolf-Rayet and O (WR+O) star binary system y² Velorum. The AMBER instrument was used with the telescopes UT2, UT3, and UT4 on baselines...
Fizeau interferometry with the LBT astronomy on the way to ELTs (2007)
Gaessler, W., Herbst, T. M., Ragazzoni, R., Eckart, A., Weigelt, G.
The Large Binocular Telescope (LBT) consists of two 8.4 m mirrors on one mechanical mounting, with a center to center separation of 14.4 m. In the combined, focus the LBT provides the spatial...
Docobo Durántez, José Angel, Tamazian, V.S., Balega, Y.Y., Andrade Baliño, Manuel, Schertl, D., Weigelt, G., ...
3D Radiative Transfer Modeling of Clumpy Dust Tori Around AGN (2006)
Hoenig, S. F., Beckert, T., Ohnaka, K., Weigelt, G.
We present 3-dimensional radiative transfer models for clumpy dust tori around AGN. Our method combines Monte Carlo simulations of individual dust clouds with the actual 3-dimensional distribution of...
Direct constraint on the distance of y2 Velorum from AMBER/VLTI observations (2006)
Millour, F., Petrov, R. G., Chesneau, O., Bonneau, D., Dessart, L., Bechet, C., ...
In this work, we present the first AMBER observations, of the Wolf-Rayet and O (WR+O) star binary system y2 Velorum. The AMBER instrument was used with the telescopes UT2, UT3, and UT4 on baselines...
We present the first NIR spectro-interferometry of the LBV Eta Carinae. The K band observations were performed with the AMBER instrument of the ESO Very Large Telescope Interferometer using three...
Kraus, S., Balega, Y., Elitzur, M., Preibisch, Th., Rosen, A., ...
NGC 7538 IRS1 is a high-mass (approx. 30 M_sun) protostar with a CO outflow, an associated UCHII region, and a linear methanol maser structure, which might trace a Keplerian-rotating circumstellar...
Hoenig, S. F., Beckert, T., Ohnaka, K., Weigelt, G.
Recent observations of NGC 1068 and other AGN support the idea of a geometrically and optically thick dust torus surrounding the central supermassive black hole and accretion disk of AGN. In type 2...
An asymmetry detected in the disk of Kappa CMa with the AMBER/VLTI (2006)
Meilland, Anthony, Millour, Florentin, Stee, Philippe, Domiciano De Souza, Armando, Petrov, Romain, Mourard, Denis, ...
Aims. We study the geometry and kinematics of the circumstellar environment of the Be star Kappa CMa in the Br gamma emission line and its nearby continuum. Methods. We use the VLTI/AMBER instrument...
Bispectrum speckle interferometry of the massive protostellar outflow source IRAS 23151+5912 (2006)
Weigelt, G., Beuther, H., Hofmann, K. H., Meyer, M. R., Preibisch, Th, Schertl, D., ...
We present bispectrum speckle interferometry of the massive protostellar object IRAS 23151+5912 in the near-infrared K' band. The reconstructed image shows the diffuse nebulosity north-east of two...
A compact dusty disk around the Herbig Ae star HR 5999 resolved with VLTI / MIDI (2006)
Preibisch, Th, Kraus, S., Driebe, Th, Van Boekel, R., Weigelt, G.
Aims.We have used mid-infrared long-baseline interferometry to resolve the circumstellar material around the Herbig Ae star HR 5999, providing the first direct measurement of its angular size, and to...
Ohnaka, K., Driebe, T., Hofmann, K. H., Leinert, Ch, Morel, S., Paresce, F., ...
We present the results of N-band spectro-interferometric observations of the silicate carbon star IRAS08002-3803 with the MID-infrared Interferometric instrument (MIDI) at the Very Large Telescope...
MATISSE: perspective of imaging in the mid-infrared at the VLTI (2006)
Lopez, B., Wolf, S., Lagarde, S., Abraham, P., Antonelli, P., Augereau, J. C., ...
Our objective is the development of mid-infrared imaging at the VLTI. The related science case study demonstrates the enormous capability of a new generation mid-infrared beam combiner. MATISSE will...
MATISSE: A four beams combiner in the mid-infrared for the VLTI (2006)
Lagarde, S., Lopez, B., Antonelli, P., Beckman, U., Behrend, J., Bresson, Y., ...
A first generation of VLTI (Very Large Telescopes Interferometer) focal instruments, AMBER in the near-infrared and MIDI in the mid-infrared, has been already integrated and tested. New and important...
Ohnaka, K., Driebe, T., Hofmann, K.H., Leinert, C., Morel, S., Paresce, F., ...
We present the results of N-band spectro-interferometric observations of the silicate carbon star IRAS08002-3803 with the MID-infrared Interferometric instrument (MIDI) at the Very Large Telescope...
MATISSE: perspective of imaging in the mid-infrared at the VLTI (2006)
Lopez, B., Wolf, S., Lagarde, S., Ãbrahám, P., Antonelli, P., Augereau, J.C., ...
Our objective is the development of mid-infrared imaging at the VLTI. The related science case study demonstrates the enormous capability of a new generation mid-infrared beam combiner. MATISSE will...
MATISSE: a four beams combiner in the mid-infrared for the VLTI (2006)
Lagarde, S., Lopez, B., Antonelli, P., Beckman, U., Behrend, J., Bresson, Y., ...
A first generation of VLTI (Very Large Telescopes Interferometer) focal instruments, AMBER in the near-infrared and MIDI in the mid-infrared, has been already integrated and tested. New and important...
An asymmetry detected in the disk of Kappa CMa with the AMBER/VLTI (2006)
Meilland, Anthony, Millour, Florentin, Stee, Philippe, Domiciano De Souza, Armando, Petrov, Romain, Mourard, Denis, ...
Aims. We study the geometry and kinematics of the circumstellar environment of the Be star Kappa CMa in the Br gamma emission line and its nearby continuum. Methods. We use the VLTI/AMBER instrument...
R. Lachaume, Th. Preibisch, Th. Driebe, G. Weigelt
Abstract. We report spatially resolved, spectrally dispersed N-band observations of the B[e] star Hen 3-1191 with the MIDI instrument of the Very Large Telescope Interferometer. The object is...
Bispectrum speckle interferometry of the massive protostellar outflow source IRAS 23151+5912 (2005)
Weigelt, G., Beuther, H., Meyer, M. R., Preibisch, Th., Schertl, D., ...
We present bispectrum speckle interferometry of the massive protostellar object IRAS 23151+5912 in the near-infrared K' band. The reconstructed image shows the diffuse nebulosity north-east of two...
De Souza, A. Domiciano, Driebe, T., Chesneau, O., Kraus, S., Miroshnichenko, A. S., ...
We present the first high spatial and spectral observations of the circumstellar envelope (CSE) of a B[e] supergiant (CPD$-57 2874$), performed with the Very Large Telescope Interferometer (VLTI)....
De Souza, A. Domiciano, Driebe, T., Chesneau, O., Kraus, S., Miroshnichenko, A. S., ...
We present the first high spatial and spectral observations of the circumstellar envelope (CSE) of a B[e] supergiant (CPD$-57 2874$), performed with the Very Large Telescope Interferometer (VLTI)....
De Souza, A. Domiciano, Driebe, T., Chesneau, O., Kraus, S., Miroshnichenko, A. S., ...
We present the first spectro-interferometric observations of the circumstellar envelope (CSE) of a B[e] supergiant (CPD -57 2874), performed with the Very Large Telescope Interferometer (VLTI) using...
Malbet, F., Benisty, M., De Wit, W.J., Kraus, S., Meilland, A., Millour, F., ...
The young stellar object MWC 297 is an embedded B1.5Ve star exhibiting strong hydrogen emission lines and a strong near-infrared continuum excess. This object has been observed with the VLT...
Malbet, F., Benisty, M., De Wit, W.J., Kraus, S., Meilland, A., Millour, F., ...
The young stellar object MWC 297 is an embedded B1.5Ve star exhibiting strong hydrogen emission lines and a strong near-infrared continuum excess. This object has been observed with the VLT...
Malbet, F., Benisty, M., De Wit, W. J., Kraus, S., Meilland, A., Millour, F., ...
The young stellar object MWC 297 has been observed with the VLT interferometer equipped with the AMBER instrument. MWC 297 has been spatially resolved in the continuum with a visibility of 0.50 as...
Ohnaka, Keiichi, Driebe, T., Leinert, Ch., Morel, S., Paresce, F., ...
We present the results of N-band spectro-interferometric observations of the silicate carbon star IRAS08002-3803 with the MID-infrared Interferometric instrument (MIDI) at the Very Large Telescope...
First AMBER/VLTI observations of hot massive stars (2005)
Petrov, R. G., Millour, F., Chesneau, O., Weigelt, G., Bonneau, D., Stee, Ph., ...
AMBER is the first near infrared focal instrument of the VLTI. It combines three telescopes and produces spectrally resolved interferometric measures. This paper discusses some preliminary results of...
First AMBER/VLTI observations of hot massive stars (2005)
Petrov, R., Millour, F., Chesneau, O., Weigelt, G., Bonneau, D., Stee, Ph., ...
AMBER is the first near infrared focal instrument of the VLTI. It combines three telescopes and produces spectrally resolved interferometric measures. This paper discusses some preliminary results of...
First AMBER/VLTI observations of hot massive stars (2005)
Petrov, R., Millour, F., Chesneau, O., Weigelt, G., Bonneau, D., Stee, Ph., ...
AMBER is the first near infrared focal instrument of the VLTI. It combines three telescopes and produces spectrally resolved interferometric measures. This paper discusses some preliminary results of...
Malbet, Fabien, Benisty, M., De Wit, W. J., Kraus, S., Meilland, A., Millour, F., ...
The young stellar object MWC297 is a B1.5Ve star exhibiting strong hydrogen emission lines. This object has been observed by the AMBER/VLTI instrument in 2-telescope mode in a sub-region of the K...
Eta Car through the eyes of interferometers (2005)
Chesneau, Olivier, Boekel, R.Van, Herbst, T., Kervella, P., Min, M., ...
The core of the nebula surrounding Eta Carinae has recently been observed with VLT/NACO, VLTI/VINCI, VLTI/MIDI and VLTI/AMBER in order to spatially and spectrally constrain the warm dusty environment...
Eta Car through the eyes of interferometers (2005)
Chesneau, Olivier, Boekel, R.Van, Herbst, T., Kervella, P., Min, M., ...
The core of the nebula surrounding Eta Carinae has recently been observed with VLT/NACO, VLTI/VINCI, VLTI/MIDI and VLTI/AMBER in order to spatially and spectrally constrain the warm dusty environment...
Eta Car through the eyes of interferometers (2005)
Chesneau, Olivier, Van Boekel, R., Herbst, T., Kervella, P., Min, M., ...
The core of the nebula surrounding Eta Carinae has recently been observed with VLT/NACO, VLTI/VINCI, VLTI/MIDI and VLTI/AMBER in order to spatially and spectrally constrain the warm dusty environment...
A quasi-time-dependent radiative transfer model of OH104.9+2.4 (2005)
Riechers, D., Balega, Y., Driebe, T., Men'shchikov, A. B., Shenavrin, V. I., ...
We investigate the pulsation-phase dependent properties of the circumstellar dust shell (CDS) of the OH/IR star OH104.9+2.4 based on radiative transfer modeling (RTM) using the code DUSTY. Our...
De Souza, A. Domiciano, Driebe, T., Chesneau, O., Kraus, S., Miroshnichenko, A. S., ...
We present the first high spatial and spectral observations of the circumstellar envelope (CSE) of a B[e] supergiant (CPD$-57 2874$), performed with the Very Large Telescope Interferometer (VLTI)....
Malbet, Fabien, Benisty, M., De Wit, W.J., Kraus, S., Meilland, A., Millour, F., ...
The young stellar object MWC297 is a B1.5Ve star exhibiting strong hydrogen emission lines. This object has been observed by the AMBER/VLTI instrument in 2-telescope mode in a sub-region of the K...
De Souza, A. Domiciano, Driebe, T., Chesneau, O., Kraus, S., Miroshnichenko, A. S., ...
We present the first high spatial and spectral observations of the circumstellar envelope (CSE) of a B[e] supergiant (CPD$-57 2874$), performed with the Very Large Telescope Interferometer (VLTI)....
Malbet, Fabien, Benisty, M., De Wit, W.J., Kraus, S., Meilland, A., Millour, F., ...
The young stellar object MWC297 is a B1.5Ve star exhibiting strong hydrogen emission lines. This object has been observed by the AMBER/VLTI instrument in 2-telescope mode in a sub-region of the K...
Malbet, F., Benisty, M., De Wit, W.J., Kraus, S., Meilland, A., Millour, F., ...
The young stellar object MWC 297 is an embedded B1.5Ve star exhibiting strong hydrogen emission lines and a strong near-infrared continuum excess. This object has been observed with the VLT...
Eta Car through the eyes of interferometers (2005)
Chesneau, Olivier, Boekel, R.Van, Herbst, T., Kervella, P., Min, M., ...
The core of the nebula surrounding Eta Carinae has recently been observed with VLT/NACO, VLTI/VINCI, VLTI/MIDI and VLTI/AMBER in order to spatially and spectrally constrain the warm dusty environment...
Malbet, Fabien, Benisty, M., De Wit, W.J., Kraus, S., Meilland, A., Millour, F., ...
The young stellar object MWC297 is a B1.5Ve star exhibiting strong hydrogen emission lines. This object has been observed by the AMBER/VLTI instrument in 2-telescope mode in a sub-region of the K...
Infrared interferometry of AGN (2005)
Weigelt, G., Beckert, T., Duschl, W., Hönig, S., Wittkowski, M.
Orbits of new Hipparcos binaries. I (2005)
Balega, I. I., Balega, Y. Y., Hofmann, K. H., Pluzhnik, E. A., Schertl, D., Shkhagosheva, Z. U., ...
LINC-NIRVANA : MCAO toward extremely large telescopes (2005)
Gaessler, W., Arcidiacono, C., Egner, S., Herbst, T. M., Andersen, D., Baumeister, H., ...
Mid-infrared interferometry of the Mira variable RR Sco with the VLTI MIDI instrument (2005)
Ohnaka, K., Bergeat, J., Driebe, T., Graser, U., Hofmann, K. H., Köhler, R., ...
A quasi-time-dependent radiative transfer model of OH104.9+2.4 (2005)
Riechers, D., Balega, Y., Driebe, T., Hofmann, K. H., Men'shchikov, A. B., Shenavrin, V. I., ...
Close binary companions of the HAeBe stars LkH alpha 198, Elias 1, HK Ori and V380 Ori (2005)
Smith, K. W., Balega, Y. Y., Duschl, W. J., Hofmann, K. H., Lachaume, R., Preibisch, T., ...
A quasi-time-dependent radiative transfer model of OH 104.9+2.4 (2005)
Riechers, D., Balega, Y., Driebe, T., Men'shchikov, A. B., Shenavrin, V. I., ...
We investigate the pulsation-phase dependent properties of the circumstellar dust shell (CDS) of the OH/IR star OH 104.9+2.4 based on radiative transfer modeling (RTM) using the code DUSTY. Our...
Mid-infrared interferometry of the Mira variable RR Sco with the VLTI MIDI instrument (2005)
Ohnaka, K., Bergeat, J., Driebe, T., Graser, U., Köhler, R., ...
We present the results of the first mid-infrared interferometric observations of the Mira variable RR Sco with the MID-infrared Interferometer (MIDI) coupled to the European Southern Observatory's...
Malbet, F., Benisty, M., De Wit, W.J., Kraus, S., Meilland, A., Millour, F., ...
The young stellar object MWC 297 is an embedded B1.5Ve star exhibiting strong hydrogen emission lines and a strong near-infrared continuum excess. This object has been observed with the VLT...
Malbet, Fabien, Benisty, M., De Wit, W.J., Kraus, S., Meilland, A., Millour, F., ...
The young stellar object MWC297 is a B1.5Ve star exhibiting strong hydrogen emission lines. This object has been observed by the AMBER/VLTI instrument in 2-telescope mode in a sub-region of the K...
Eta Car through the eyes of interferometers (2005)
Chesneau, Olivier, Boekel, R.Van, Herbst, T., Kervella, P., Min, M., ...
The core of the nebula surrounding Eta Carinae has recently been observed with VLT/NACO, VLTI/VINCI, VLTI/MIDI and VLTI/AMBER in order to spatially and spectrally constrain the warm dusty environment...
Modelling a Circumstellar Disc Traced by Methanol Masers. (2005)
Pestalozzi, M., Elitzur, M., Minier, V., Conway, J., Booth, R., De Buizer, J., ...
Close binary companions of the HAeBe stars LkHa 198, Elias 1, HK Ori and V380 Ori (2004)
Smith, K. W., Balega, Y. Y., Duschl, W. J., Lachaume, R., Preibisch, T., ...
We present diffraction-limited bispectrum speckle interferometry observations of four well-known Herbig Ae/Be (HAeBe) stars, LkHa 198, Elias 1, HK Ori and V380 Ori. For two of these, LkHa 198 and...
Riechers, D., Balega, Y., Driebe, T., Men'shchikov, A. B., Weigelt, G.
We present near-infrared speckle interferometry of the OH/IR star OH 104.9+2.4 in the K' band obtained with the 6m telescope of the Special Astrophysical Observatory (SAO). At a wavelength of lambda...
Bipolar outflow on the Asymptotic Giant Branch - the case of IRC+10011 (2004)
Vinkovic, D., Bloecker, Th., Elitzur, M., Weigelt, G.
Near-IR imaging of the AGB star IRC+10011 (= CIT3) reveals the presence of a bipolar structure within the central ~0.1 arcsec of a spherical dusty wind. We show that the image asymmetries originate...
Woodruff, H. C., Eberhardt, M., Driebe, T., Ohnaka, K., Richichi, A., ...
We present K-band commissioning observations of the Mira star prototype o Cet obtained at the ESO Very Large Telescope Interferometer (VLTI) with the VINCI instrument and two siderostats. The...
VLTI/VINCI observations of the nucleus of NGC 1068 using the adaptive optics system MACAO (2004)
Wittkowski, M., Kervella, P., Arsenault, R., Paresce, F., Beckert, T., Weigelt, G.
We present the first near-infrared K-band long-baseline interferometric measurement of the prototype Seyfert 2 galaxy NGC 1068 with resolution lambda/B \~ 10 mas obtained with the Very Large...
The central dusty torus in the active nucleus of NGC 1068 (2004)
Jaffe, W., Meisenheimer, K., Rottgering, H.J.A., Leinert, C., Richichi, A., Chesneau, O., ...
Active galactic nuclei (AGNs) display many energetic phenomena-broad emission lines, X-rays, relativistic jets, radio lobes-originating from matter falling onto a supermassive black hole. It is...
Leinert, C., Chesneau, O., Malbet, F., Kohler, R., ...
We present the first long baseline mid-infrared interferometric observations of the circumstellar disks surrounding Herbig Ae/Be stars. The observations were obtained using the mid-infrared...
The central dusty torus in the active nucleus of NGC 1068 (2004)
Jaffe, W., Meisenheimer, K., Roettgering, H. J. A., Leinert, Ch., Richichi, A., Chesneau, O., ...
Active galactic nuclei (AGNs) display many energetic phenomenabroad emission lines, X-rays, relativistic jets, radio lobesoriginating from matter falling onto a supermassive black hole. It is...
Speckle interferometry of nearby multiple stars. II. (2004)
Balega, I., Balega, Y. Y., Maksimov, A. F., Pluzhnik, E. A., Schertl, D., Shkhagosheva, Z. U., ...
The central dusty torus in the active nucleus of NGC 1068 (2004)
Jaffe, W., Meisenheimer, K., Röttgering, H. J. A., Leinert, C., Richichi, A., Chesneau, O., ...
Speckle interferometry of the HAeBe star V376 Cas (2004)
Smith, K. W., Balega, Y. Y., Hofmann, K. H., Preibisch, T., Schertl, D., Weigelt, G.
Bipolar outflow on the asymptotic giant branch - the case of IRC+10011 (2004)
Vinkovic, D., Blöcker, T., Hofmann, K. H., Elitzur, M., Weigelt, G.
VLTI/VINCI observations of the nucleus of NGC 1068 using the adaptive optics system MACAO (2004)
Wittkowski, M., Kervella, P., Arsenault, R., Paresce, F., Beckert, T., Weigelt, G.
The central dusty torus in the active nucleus of NGC 1068 (2004)
Jaffe, W., Meisenheimer, K., Röttgering, H. J. A., Leinert, Ch., Richichi, A., Chesneau, O., ...
Active galactic nuclei (AGNs) display many energetic phenomena-broad emission lines, X-rays, relativistic jets, radio lobes-originating from matter falling onto a supermassive black hole. It is...
Leinert, Ch., Van Boekel, R., Chesneau, O., Malbet, F., Köhler, R., ...
We present the first long baseline mid-infrared interferometric observations of the circumstellar disks surrounding Herbig Ae/Be stars. The observations were obtained using the mid-infrared...
Recombining light of the VLTI at 10 microns by densifying the images (2004)
Dugue, M., Lopez, B., Przygodda, F., Graser, U., Gitton, P., Wolf, S., ...
The fringe and flexure tracking detector of the LBT LINC-NIRVANA beam-combiner instrument (2004)
Beckmann, U., Behrend, J., Böhnhardt, H., Connot, C., Driebe, T., Heininger, M., ...
LINC-NIRVANA : the single arm MCAO experiment (2004)
Egner, S. E., Gässler, W., Herbst, T. M., Ragazzoni, R., Stuik, R., Andersen, D., ...
UML modeling of the LINC-NIRVANA software (2004)
Gässler, W., Bertram, T., Briegel, F., Driebe, T., Heininger, M., Nußbaum, E., ...
APreS-MIDI, APerture synthesis in the MID-infrared with the VLTI (2004)
Lopez, B., Przygodda, F., Wolf, S., Dugou, M., Graser, U., Gitton, P. B., ...
Science program of the AMBER consortium (2004)
Malbet, F., Driebe, T., Foy, R., Fraix-Burnet, D., Mathias, P., Marconi, A., ...
Speckle interferometry of the HAeBe star V376 Cas (2003)
Smith, K., Balega, Y., Preibisch, Th., Schertl, D., Weigelt, G.
We report H- and K'-band speckle interferometric observations of the HAeBe star V376 Cas. Our observations show that the object is partially resolved. The visibility curves suggest three separate...
Near-infrared IOTA interferometry of the symbiotic star CH Cyg (2003)
Beckmann, U., Berger, J., Blöcker, T., Brewer, M. K., Lacasse, M., ...
Astrophysical potential of the AMBER/VLTI instrument (2003)
Malbet, F., Blöcker, T., Foy, R., Fraix-Burnet, D., Mathias, P., Marconi, A., ...
Using the near infrared VLTI instrument AMBER (2003)
Petrov, R. G., Malbet, F., Weigelt, G., Lisi, F., Puget, P., Antonelli, P., ...
New beam-combination techniques at IOTA (2003)
Traub, W. A., Ahearn, A., Carleton, N. P., Brewer, M. K., ...
JHK-band spectro-interferometry of T Cep with the IOTA interferometer (2003)
Weigelt, G., Beckmann, U., Berger, J., Blöcker, T., Brewer, M. K., ...
Bispectrum speckle interferometry of the massive protostellar outflow source AFGL 2591 (2003)
Preibisch, T., Balega, Y. Y., Schertl, D., Weigelt, G.
We present bispectrum speckle interferometry of the massive protostellar object AFGL 2591 in the near- infrared K- band. Our reconstructed image of the outflow cavity of AFGL 2591 has a resolution of...
JHK '-band IOTA interferometry of the circumstellar environment of R CrB (2003)
Ohnaka, K., Beckmann, U., Berger, J. P., Brewer, M. K., Hofmann, K. H., Lacasse, M. G., ...
We report the first long-baseline interferometry of the circumstellar dust environment of R CrB. The observations were carried out with the Infrared Optical Telescope Array (IOTA), using our new JHK'...
Fundamental parameters and origin of the very eccentric binary 41 Dra (2003)
Tokovinin, A., Balega, Y. Y., Pluzhnik, E. A., Shatsky, N. I., Gorynya, N. A., Weigelt, G.
The evolutionary status and origin of the most eccentric known binary in a quadruple system, 41 Dra (e = 0.9754, period 3.413 yr), are discussed. New observations include the much improved combined...
High-resolution infrared imaging of young outflow-sources (2003)
Preibisch, T., Schertl, D., Weigelt, G.
We discuss recent results from near-infrared bispectrum speckle interferometry observations of the young outflow sources in the S140 and Mon R2 star forming regions. With spatial resolutions down to...
Orbital motion of the massive multiple stars in the Orion Trapezium (2003)
Schertl, D., Balega, Y. Y., Preibisch, T., Weigelt, G.
We present bispectrum speckle interferometry of the multiple Orion Trapezium stars theta(1) Ori A, theta(1) Ori B, and theta(1) OriC obtained with the SAO 6 m telescope in Russia over a period of 5.5...
UBVJHKLM photometry and modeling of R Coronae Borealis (2002)
Yudin, B. F., Fernie, J. D., Ikhsanov, N. R., Shenavrin, V. I., Weigelt, G.
We present the results of UBVJHKLM photometry of R CrB spanning the period from 1976 to 2001. Studies of the optical light curve have shown no evidence of any stable harmonics in the variations of...
Bispectrum speckle interferometry of the B[e] star MWC 349A (2002)
Balega, Y., Ikhsanov, N. R., Miroshnichenko, A. S., Weigelt, G.
We present the results of bispectrum speckle interferometry of the B[e] star MWC 349A obtained with the SAO 6m telescope. Our diffraction-limited J-, H-, and K-band images (resolutions 43--74 mas)...
Spectral Observations of Stars in Late Stages of Stellar Evolution (2002)
Interferometric observations of stars in late stages of stellar evolution and the impact of VLTI observations are discussed. Special attention is paid to the spectral information that can be derived...
Beckmann, U., Bloecker, T., Foresto, V. Coude Du, Lacasse, M., Mennesson, B., ...
We present K'-band observations of five Mira stars with the IOTA interferometer. The interferograms were obtained with the FLUOR fiber optics beam combiner, which provides high-accuracy visibility...
Weigelt, G., Balega, Y. Y., Bloecker, T., Men'shchikov, A., Winters, J. M.
We present new near-infrared (JHK) bispectrum speckle-interferometry monitoring of the carbon star IRC+10216 obtained between 1999 and 2001 with the SAO 6m telescope. The J-, H-, and K-band...
Ohnaka, K., Balega, Y., Bloecker, T., Efimov, Y. S., Ikhsanov, N. R., ...
We present the first speckle interferometric observations of R CrB, the prototype of a class of peculiar stars which undergo irregular declines in their visible light curves. The observations were...
Properties of the close binary and circumbinary torus of the Red Rectangle (2002)
Men'shchikov, A.B., Schertl, D., Tuthill, P.G., Weigelt, G., Yungelson, L.
Speckle interferometry of nearby multiple stars (2002)
Balega, I. I., Balega, Y. Y., Hofmann, K. H., Maksimov, A. F., Pluzhnik, E. A., Schertl, D., ...
We present the results of diffraction-limited optical speckle interferometry and infrared bispectrum speckle interferometry of 111 double and 10 triple systems performed in 1998-1999 with the 6-m...
The spectroscopic and interferometric orbit of Gliese 150.2 (2002)
Balega, Y. Y., Tokovinin, A. A., Pluzhnik, E. A., Weigelt, G.
We determined the spectroscopic-interferometric orbit of the binary red dwarf Gliese 150.2 with a period of 13.84 yr and a semimajor axis of 0.257 arcsec. Based on the orbital elements and on...
Bispectrum speckle interferometry of the B[e] star MWC 349A (2002)
Hofmann, K. H., Balega, Y., Ikhsanov, N. R., Miroshnichenko, A. S., Weigelt, G.
We present the results of bispectrum speckle interferometry of the B[ e] star MWC 349A obtained with the SAO 6 m telescope. Our diffraction-limited J-, H-, and K- band images ( resolutions 43-74 mas)...
Men'shchikov, A. B., Hofmann, K. H., Weigelt, G.
We present two-dimensional (2D) radiative transfer modeling of IRC+10 216 at selected moments of its evolution in 1995-2001, which correspond to three epochs of our series of 8 near- infrared speckle...
Properties of the close binary and circumbinary torus of the Red Rectangle (2002)
Men'shchikov, A. B., Schertl, D., Tuthill, P. G., Weigelt, G., Yungelson, L. R.
New diffraction-limited speckle images of the Red Rectangle in the wavelength range 2.1-3.3 mum with angular resolutions of 44-68 mas (Tuthill et al. 2002) and previous speckle images at 0.7-2.2 mum...
High-resolution study of the young stellar objects in Mon R2 IRS 3 (2002)
Preibisch, T., Balega, Y. Y., Schertl, D., Weigelt, G.
We present a bispectrum speckle interferometry study of the embedded young stellar objects in Mon R2 IRS 3 in the near- infrared H and K bands. Our images with a resolution of 75 mas (= 62 AU) show a...
Photometric observations of R coronae borealis in the optical and infrared (2002)
Shenavrin, V. I., Fernie, J. D., Weigelt, G., Yudin, B. F.
The results of long-term photometric observations of R CrB in the UBV JHKLM bands are presented. The temporal and color characteristics of the emission of the star itself and of its extended dust...
Tuthill, P. G., Men'shchikov, A. B., Schertl, D., Monnier, J. D., Danchi, W. C., Weigelt, G.
We present new near-infrared (2.1-3.3 mum) images of the Red Rectangle with unprecedented diffraction-limited angular resolutions of 46-68 mas; 4 times higher than that of the Hubble space telescope...
Weigelt, G., Balega, Y. Y., Blöcker, T., Hofmann, K. H., Men'shchikov, A. B., Winters, J. M.
We present new near-infrared (JHK) bispectrum speckle- interferometry monitoring of the carbon star IRC+10216 obtained between 1999 and 2001 with the SAO 6 m telescope. The J-, H-, and K-band...
Diffraction-limited bispectrum speckle interferometry of the Herbig Be star R Mon (2002)
Weigelt, G., Balega, Y. Y., Hofmann, K. H., Preibisch, T.
We explore the structures immediately surrounding the intermediate-mass young stellar object R Mon with bispectrum speckle interferometry, conventional near-infrared imaging and by analyzing optical...
Weigelt, G., Balega, Y. Y., Preibisch, T., Schertl, D., Smith, M. D.
Bispectrum speckle interferometry is employed to explore the immediate environment of the deeply embedded young stellar object S140 IRS1. A K'-band (2.0-2.3 mum) diffraction-limited resolution of 76...
UBV JHKLM photometry and modeling of R Coronae Borealis (2002)
Yudin, B. F., Fernie, J. D., Ikhsanov, N. R., Shenavrin, V. I., Weigelt, G.
We present the results of UBVJHKLM photometry of R CrB spanning the period from 1976 to 2001. Studies of the optical light curve have shown no evidence of any stable harmonics in the variations of...
The potential of an extension of Amber to the visible (2002)
Petrov, R. G., Stee, P., Weigelt, G., Mourard, D., Vakili, F., Jankov, S., ...
Multiple outflows from the massive protostar S140 IRS1 (2002)
Preibisch, T., Weigelt, G., Schertl, D., Balega, Y., Smith, M.
High-resolution studies of young molecular outflow sources (2002)
Weigelt, G., Preibisch, T., Schertl, D., Balega, Y. Y., Smith, M. D.
Speckle interferometry and radiative transfer modelling of the Wolf-Rayet star WR 118 (2001)
Yudin, B., Balega, Y., Bloecker, T., Schertl, D., Weigelt, G.
WR 118 is a highly evolved Wolf-Rayet star of the WC10 subtype surrounded by a permanent dust shell absorbing and re-emitting in the infrared a considerable fraction of the stellar luminosity. We...
Balega, Y., Bloecker, T., Weigelt, G.
(abridged) CIT 3 is an oxygen-rich long-period variable evolving along the AGB and one of the most extreme infrared AGB objects. We present the first bispectrum speckle-interferometry observations of...
Gliese 569B: A young multiple brown dwarf system? (2001)
Kenworthy, M. A., Hofmann, K-H., Close, L., Hinz, P., Mamajek, E., Schertl, D., ...
The nearby late M star Gliese 569B was recently found by adaptive optics imaging to be a double with separation ~1 AU. To explore the orbital motion and masses, we have undertaken a high resolution...
AGB and Post-AGB Evolution: Structural and Chemical Changes (2001)
Bloecker, T., Osterbart, R., Weigelt, G., Balega, Y., Men'shchikov, A.
Structural and chemical changes during the AGB and post-AGB evolution are discussed with respect to two recent observational and theoretical findings. On the one hand, high-resolution infrared...
Bloecker, T., Balega, Y., Weigelt, G.
(abridged) NML Cyg is a highly evolved OH/IR supergiant and supposed to be among the most luminous supergiants in the galaxy. We present the first diffraction limited 2.13micron observations of NML...
Przygodda, F., Bloecker, T., Weigelt, G.
We present computer simulations of interferometric imaging with the Very Large Telescope Interferometer (VLTI) of the European Southern Observatory (ESO) and the Astronomical MultiBEam Recombiner...
Schertl, D., Balega, Y., Hannemann, T., Preibisch, Th., Weigelt, G.
We present bispectrum speckle interferometry and speckle polarimetry of the deeply embedded infrared bipolar outflow source S140 IRS1, a massive protostellar object in the L1204 molecular cloud....
GI2T/REGAIN spectro-interferometry with a new infrared beam combiner (2000)
Weigelt, G., Mourard, D., Abe, L., Beckmann, U., Chesneau, O., Hillemanns, C., ...
We have built an infrared beam combiner for the GI2T/REGAIN interferometer of the Observatoire de la Cote d'Azur. The beam combiner allows us to record spectrally dispersed Michelson interference...
Beckmann, U., Bloecker, T., Foresto, V. Coude Du, Lacasse, M., Millan-Gabet, R., ...
We present K-band observations of five Mira stars with the IOTA interferometer. The interferograms were obtained with the FLUOR fiber optics beam combiner which provides high-accuracy visibility...
Bloecker, T., Przygodda, F., Weigelt, G.
We present computer simulations of interferometric imaging with the VLT interferometer and the AMBER instrument. These simulations include both the astrophysical modelling of a stellar object by...
Osterbart, R., Balega, Y., Bloecker, T., Men'shchikov, A., Weigelt, G.
We present high-resolution J-, H-, and K-band observations and the first H-K color image of the carbon star IRC +10216. The images were reconstructed from 6m telescope speckle interferograms using...
The dynamical evolution of the dust shell of IRC+10216 (2000)
Osterbart, R., Balega, Y., Bloecker, T., Men'shchikov, A., Weigelt, G.
We present high-resolution J-, H-, and K-band observations of the carbon star IRC+10216. The images were reconstructed from 6 m telescope speckle interferograms using the bispectrum speckle...
Bloecker, T., Balega, Y., Lichtenthaeler, J., Osterbart, R., Weigelt, G.
The hypergiant IRC+10420 is a unique object for the study of stellar evolution since it is the only object that is believed to be witnessed in its rapid transition from the red supergiant stage to...
Gauger, A., Balega, Y. Y., Irrgang, P., Osterbart, R., Weigelt, G.
We present the first diffraction-limited speckle masking observations of the oxygen-rich AGB star AFGL 2290. The data was obtained with the Russian 6m SAO telescope. At the wavelength of 2.11um a...
Weigelt, G., Bloecker, T., Osterbart, R., Balega, Y. Y., Fleischer, A. J., ...
We present high-resolution J-, H-, and K-band observations of the carbon star IRC+10216. The images were reconstructed from 6m telescope speckle interferograms using the speckle masking bispectrum...
Diffraction-limited Speckle-Masking Interferometry of the Red Supergiant VY CMa (1998)
Wittkowski, M., Langer, N., Weigelt, G.
We present the first diffraction-limited images of the mass-loss envelope of the red supergiant star VY CMa. The two-dimensional optical and NIR images were reconstructed from 3.6 m telescope speckle...
Weigelt, G., Balega, Y., Bloecker, T., Fleischer, A. J., Osterbart, R., Winters, J. M.
We present the first K'-band image of the carbon star IRC+10216 with 76 mas resolution. The diffraction-limited image was reconstructed from 6m telescope speckle data using the speckle masking...
Wittkowski, M., Balega, Y., Beckert, T., Duschl, W. J., Weigelt, G.
We present the first K-band bispectrum speckle interferometry of NGC 1068 with an angular resolution of 76 mas (~5.5pc). This angular resolution allows us to attribute the measured flux to only one...
Morhology and kinematics of eta Carinae (1994)
Duschl, W. J., Rigaut, F., Weigelt, G.
We present a high-resolution image of $\eta$~Car. Together with IR and visual observations of the central arcsecond, we use this to discuss the morphological structure of $\eta$~Car on the different...
Profiles of a Key Programme: Gravitational Lensing (1989)
Surdej, Jean, Arnaud, J, Borgeest, U, Djorgovski, S, Fleischmann, F, Hammer, F, ...
Prior to Professor van der Laan's enquiry, in the March 1988 issue of the Messenger, on the general interest among astronomers from the European community to possibly participate in Key Programmes...
LINC-NIRVANA : how to get a 23m wavefront nearly flat
Gässler, W., Ragazzoni, R., Herbst, T. M., Andersen, D., Arcidiacono, C., Baumeister, H., ...