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32 papers · 2 filters
New determination of abundances and stellar parameters for a set of weak G-band stars
A. Palacios, G. Jasniewicz, T. Masseron +3
Weak G-band (wGb) stars are very peculiar red giants almost devoided of carbon and often mildly enriched in lithium. Despite their very puzzling abundance patterns, very few detail…
Pathways for Observing Stellar Surfaces Using 3D Hydrodynamical Simulations of Evolved Stars
A. Chiavassa, B. Freytag
Evolved stars are among the largest and brightest stars and they are ideal targets for the new generation of sensitive, high resolution instrumentation that provides spectrophotome…
The nearby AGB star L2 Puppis: the birth of a planetary nebula ?
P. Kervella, M. Montargès, E. Lagadec
Adaptive optics observations in the infrared (VLT/NACO, Kervella et al. 2014) and visible (VLT/SPHERE, Kervella et al. 2015) domains revealed that the nearby AGB star L2 Pup (d=64…
The convection of close red supergiant stars observed with near-infrared interferometry
Miguel Montargès, Pierre Kervella, Guy Perrin +2
Our team has obtained observations of the photosphere of the two closest red supergiant stars Betelgeuse ( Ori) and Antares ( Sco) using near infrared interferometry. We have…
Olivier Chesneau's work on low mass stars
Lagadec Eric
During his too short career, Olivier Chesneau pioneered the study of the circumstellar environments of low mass evolved stars using very high angular resolution techniques. He appl…
Monte-Carlo radiative transfer simulation of the circumstellar disk of the Herbig Ae star HD 144432
L. Chen, A. Kreplin, G. Weigelt +6
Studies of pre-transitional disks, with a gap region between the inner infrared-emitting region and the outer disk, are important to improving our understanding of disk evolution a…