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13 papers · 2 filters

astro-ph2000★ 567 cited

ISO spectroscopy of circumstellar dust in 14 Herbig Ae/Be systems: towards an understanding of dust processing

G. Meeus, L. B. F. M. Waters, J. Bouwman +3

We present Infrared Space Observatory (ISO) spectra of fourteen isolated Herbig Ae/Be (HAEBE) stars, to study the characteristics of their circumstellar dust. These spectra show la…

astro-ph2000★ 9 cited

A search for new gamma Doradus stars in the Geneva photometric database

Laurent Eyer, Conny Aerts

We present a study of selected potential gamma Doradus stars observed in the Geneva photometric system. Eleven stars were monitored at least during the last year of functioning of…

astro-ph2000★ 29 cited

HD172481: a super lithium-rich metal-deficient post-AGB binary with a red AGB companion

Maarten Reyniers, Hans Van Winckel

We present in this paper a study on the peculiar supergiant HD172481. Its spectral type (F2Ia), high galactic latitude (b=-10.37), circumstellar dust, high radial velocity and mode…

astro-ph2000

ISO impact on stellar models and vice versa

L. Decin, C. Waelkens, K. Eriksson +5

We present a detailed spectroscopic study of a sample of bright, mostly cool, stars observed with the Short-Wavelength Spectrometer (SWS) on board the Infrared Space Observatory (I…

astro-ph2000★ 4 cited

ISO-SWS calibration and the accurate modelling of cool-star atmospheres: I. Method

L. Decin, C. Waelkens, K. Eriksson +5

A detailed spectroscopic study of the ISO-SWS data of the red giant Alpha Tau is presented, which enables not only the accurate determination of the stellar parameters of Alpha Tau…

astro-ph2000

The observation of Delta Sct and Gamma Dor stars by using MONS satellite

F. M. Zerbi, E. Poretti, C. Aerts +2

The MONS space experiment will be able to verify some of the most important topics in the asteroseismologic studies of Delta Sct and Gamma Dor stars. We discuss how the Doradus…

astro-ph2000

Prospects of Variable Star Research by Future Space Missions

Laurent Eyer

ESA and NASA are studying projects having a tremendous return on variable star research. Other national space agencies are also studying or developing projects of smaller costs but…

astro-ph2000★ 12 cited

ISO spectroscopy of circumstellar dust in the Herbig Ae systems AB Aur and HD 163296

M. E. van den Ancker, J. Bouwman, P. R. Wesselius +3

Using both the Short- and Long-wavelength Spectrometers on board the Infrared Space Observatory (ISO), we have obtained infrared spectra of the Herbig Ae systems AB Aur and HD 1632…

astro-ph2000★ 4 cited

Predictions on the number of variable stars for the GAIA space mission and for surveys as the ground-based International Liquid Mirror Telescope

Laurent Eyer, Jan Cuypers

Future space and ground-based survey programmes will produce an impressive amount of photometric data. The GAIA space mission will map the complete sky down to mag V=20 and produce…

astro-ph2000★ 1 cited

Mode identification from line-profile variations

Conny Aerts, Laurent Eyer

We review the current status of different mode-identification techniques based on observed line-profile variations. Three basic methods are currently available to identify the non-…

astro-ph2000

New gamma Doradus Stars from the Hipparcos Mission and Geneva Photometry

Laurent Eyer, Conny Aerts

A search for new gamma Dor stars was undertaken using the Hipparcos periodic variable star catalogue and the Geneva photometric database, leading to a list of 40 new candidates. We…

astro-ph2000

Problems encountered in the Hipparcos variable stars analysis

Laurent Eyer, Michel Grenon

Among the 17 volumes of results from the Hipparcos space mission, two are dedicated to variable stars. These two volumes arose from the work of two groups, one at the Geneva Observ…

astro-ph2000★ 50 cited

Asteroseismology and Oblique Pulsator Model of Beta Cephei

H. Shibahashi, C. Aerts

We discuss the oscillation features of Beta Cephei, which is a magnetic star in which the magnetic axis seems to be oblique to the rotation axis. We interpret the observed equi-dis…