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...
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...
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...
Docobo Durántez, José Angel, Tamazian, V.S., Balega, Y.Y., Andrade Baliño, Manuel, Schertl, D., Weigelt, G., ...
Orbits of new Hipparcos binaries. I (2005)
Balega, I. I., Balega, Y. Y., Hofmann, K. H., Pluzhnik, E. A., Schertl, D., Shkhagosheva, Z. U., ...
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., ...
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...
Speckle interferometry of nearby multiple stars. II. (2004)
Balega, I., Balega, Y. Y., Maksimov, A. F., Pluzhnik, E. A., Schertl, D., Shkhagosheva, Z. U., ...
Speckle interferometry of the HAeBe star V376 Cas (2004)
Smith, K. W., Balega, Y. Y., Hofmann, K. H., Preibisch, T., Schertl, D., Weigelt, G.
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...
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...
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...
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...
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...
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...
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...
High-resolution studies of young molecular outflow sources (2002)
Weigelt, G., Preibisch, T., Schertl, D., Balega, Y. Y., Smith, M. D.
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...
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...