Post-AGB stars with hot circumstellar dust: binarity of the low-amplitude pulsators (2009)
Van Winckel, Hans, Evans, Tom Lloyd, Briquet, Maryline, De Cat, Peter, Degroote, Pieter, De Meester, Wim, ...
While the first binary post-AGB stars were serendipitously discovered, the distinct characteristics of their Spectral Energy Distribution (SED) allowed us to launch a more systematic search for...
The rotation and coma profiles of comet C/2004 Q2 (Machholz) (2008)
Reyniers, Maarten, Degroote, Pieter, Bodewits, Dennis, Cuypers, Jan, Waelkens, Christoffel
Aims. Rotation periods of cometary nuclei are scarce, though important when studying the nature and origin of these objects. Our aim is to derive a rotation period for the nucleus of comet C/2004 Q2...
A Spectroscopic and Photometric Study of the Metal-Poor, Pulsating, Post-AGB Binary HD 46703 (2008)
Hrivnak, Bruce J., Van Winckel, Hans, Reyniers, Maarten, Bohlender, David, Waelkens, Christoffel, Lu, Wenxian
The metal-poor post-AGB star HD 46703 is shown to be a single-line spectroscopic binary with a period of 600 days, a high velocity of -94 km/s, and an orbital eccentricity of 0.3. Light curve studies...
METIS - the Mid-infrared E-ELT Imager and Spectrograph (2008)
Brandl, Bernhard R., Lenzen, Rainer, Pantin, Eric, Glasse, Alistair, Blommaert, Joris, Venema, Lars, ...
METIS, the Mid-infrared ELT Imager and Spectrograph (formerly called MIDIR), is a proposed instrument for the European Extremely Large Telescope (E-ELT), currently undergoing a phase-A study. The...
The Photodetector Array Camera and Spectrometer (PACS) for the Herschel space observatory (2008)
Poglitsch, Albrecht, Waelkens, Christoffel, Bauer, Otto H., Cepa, Jordi, Feuchtgruber, Helmut, Henning, Thomas, ...
The SPICA Consortium, Swinyard, Bruce, Nakagawa, Takao, Merken, Patrick, Royer, Pierre, Souverijns, Tim, ...
METIS: the mid-infrared E-ELT imager and spectrograph (2008)
Brandl, Bernhard R., Lenzen, Rainer, Pantin, Eric, Glasse, Alistair, Blommaert, Joris, Venema, Lars, ...
The Photodetector Array Camera and Spectrometer (PACS) for the Herschel Space Observatory (2008)
Poglitsch, Albrecht, Waelkens, Christoffel, Bauer, Otto H., Cepa, Jordi, Feuchtgruber, Helmut, Henning, Thomas, ...
The Photodetector Array Camera and Spectrometer (PACS) is one of the three science instruments for ESA's far infrared and submillimeter observatory Herschel. It employs two Ge:Ga photoconductor...
METIS: the mid-infrared E-ELT imager and spectrograph (2008)
Brandl, Bernhard R., Lenzen, Rainer, Pantin, Eric, Glasse, Alistair, Blommaert, Joris, Venema, Lars, ...
METIS, the Mid-infrared ELT Imager and Spectrograph (formerly called MIDIR), is a proposed instrument for the European Extremely Large Telescope (E-ELT), currently undergoing a phase-A study. The...
The Photodetector Array Camera and Spectrometer (PACS) for the Herschel Space Observatory (2006)
Poglitsch, Albrecht, Waelkens, Christoffel, Bauer, Otto H., Cepa, Jordi, Feuchtgruber, Helmut, Henning, Thomas, ...
The photodetector array camera and spectrometer (PACS) for the Herschel Space Observatory (2006)
Poglitsch, Albrecht, Waelkens, Christoffel, Bauer, Otto H., Cepa, Jordi, Feuchtgruber, Helmut, Henning, Thomas, ...
The Photodetector Array Camera and Spectrometer (PACS) is one of the three science instruments for ESA's far infrared and submillimeter observatory Herschel. It employs two Ge:Ga photoconductor...
The photodetector array camera & spectrometer (ACS) for the Herschel space observatory (2005)
Poglitsch, Albrecht, Waelkens, Christoffel, Bauer, Otto H., Cepa, Jordi, Hennig, Thomas, Van Hoof, Chris, ...
The Photodetector Array Camera & Spectrometer (PACS) for the Herschel Space Observatory (2005)
Poglitsch, Albrecht, Waelkens, Christoffel, Bauer, Otto H., Cepa, Jordi, Henning, Thomas, Van Hoof, Chris, ...
The Photodetector Array Camera and Spectrometer (PACS) is one of the three science instruments for ESA's far infrared and submillimetre observatory, Herschel. It employs two Ge:Ga photoconductor...
Chemical analysis of 24 dusty (pre-)main-sequence stars (2004)
Acke, Bram, Waelkens, Christoffel
We have analysed the chemical photospheric composition of 24 Herbig Ae/Be and Vega-type stars in search for the lambda Bootis phenomenon. We present the results of the elemental abundances of the...
Aerts, C, Cuypers, J, De Cat, P, Dupret, MA, De Ridder, J, Eyer, L, ...
We gathered long-term multicolour Geneva UB(1)BB(2)V(1)VG photometric and high-resolution (R = 40000) spectroscopic data of the two gamma Doradus stars HD 12901 and HD48501. The photometry reveals...
Dupret, MA, Thoul, A, Scuflaire, R, Daszynska-Daszkiewicz, J, Aerts, C, Bourge, PO, ...
We perform a detailed seismic study of the beta Cep star HD 129929. Our analysis is based on the recent derivation of six pulsation frequencies. These frequencies are unambiguously identified from...
The Photodetector Array Camera & Spectrometer (PACS) for the Herschel Space Observatory (2004)
Poglitsch, Albrecht., Waelkens, Christoffel, Bauer, Otto H., Cepa, Jordi, Henning, Thomas, Van Hoof, Chris, ...
First results of Mercator observations of variable B stars (2004)
De Cat, P, De Ridder, J, Uytterhoeven, K, Davignon, Geert; U0018794, Raskin, G, Cuypers, J, ...
beta Centauri: An eccentric binary with two beta Cep-type components (2002)
Ausseloos, Mario; U0039073, Aerts, Conny; U0002448, Uytterhoeven, K, Schrijvers, C, Waelkens, Christoffel; U0007261, Cuypers, J
We introduce our observational study of the orbital motion and the intrinsic variability of the double-lined spectroscopic binary beta Cen. Using 463 high signal-to-noise, high-resolution spectra...
The Infrared Continuum Spectrum of VY CMa (2001)
Harwit, Martin, Malfait, Koen, Decin, Leen, Waelkens, Christoffel, Feuchtgruber, Helmut, Melnick, Gary J.
We combine spectra of VY CMa obtained with the short- and long-wavelength spectrometers, SWS and LWS, on the Infrared Space Observatory to provide a first detailed continuum spectrum of this highly...
Line-profile variations of the double-lined spectroscopic binary kappa Scorpii (2001)
Uytterhoeven, K, Aerts, Conny; U0002448, De Cat, Peter; U0003494, De Mey, K, Telting, JH, Schrijvers, C, ...
We present a total time series of high signal-to-noise, high-resolution spectra of the SiIII lambda 4552.6, lambda 4567.8 and lambda 4574.8 Angstrom lines of the fast-rotating, spectroscopic binary...
Spectral variability of the binary HR 4049 (1998)
Bakker, Eric J., Lambert, David L., Van Winckel, Hans, McCarthy, James K., Waelkens, Christoffel, Gonzalez, Guillermo
The H$\alpha$ profile varies with the orbital period. The two strong shell type emission peaks are identified as from one single broad emission feature with an absorption centered around -7.5~\kms....
Decin, Leen, Van Winckel, Hans, Waelkens, Christoffel, Bakker, Eric J.
We present a detailed chemical analysis on the basis of high-resolution, high signal-to-noise optical spectra of two post-AGB objects IRAS 22223+4327 and IRAS 04296+3429. Both display the...
On the possibility of a tidally excited low-frequency g(+)-mode in 51 Peg (1997)
Willems, B, Smeyers, P, Waelkens, Christoffel; U0007261
The possibility of a resonant excitation of a free oscillation mode with an observed period of 4.2311 d in the star 51 Pegasi by the tidal action of a low-mass companion is investigated.
The 218 day period of the peculiar late B-type star HD 101584 (1995)
Bakker, Eric J., Waelkens, Christoffel
We have searched for periodicity in the photometric and spectroscopic variations of the enigmatic star HD 101584 and found a long-term variability on a typical time scale of 1700 days (4.7 years) and...
A study on the nature of the peculiar supergiant HD101584 (1995)
Bakker, Eric J., Waelkens, Christoffel, Trams, Norman R., Van Winckel, Hans
We present a study of low- and high-resolution ultraviolet, high-resolution optical CAT/CES spectra and ultraviolet, optical and infrared photometry of the peculiar supergiant HD101584. From the...