MESS (Mass-loss of Evolved StarS), aHerschelkey program
نویسندگان
چکیده
منابع مشابه
Dust production and mass loss in cool evolved stars
Following the red giant branch phase and the subsequent core He-burning phase, the lowto intermediate-mass stars (0.8 < M/M < 8) begin to ascend the asymptotic giant branch (AGB). Pulsations levitate material from the stellar surface and provide density enhancements and shocks, which can encourage dust formation and re-processing. The dust composition depends on the atmospheric chemistry (abund...
متن کاملMass loss and dust formation around oxygen - rich evolved stars
Infrared spectra of a number of evolved O-rich stars have been obtained with the Short and Long Wavelength spectrometers on board the Infrared Space Observatory. The very broad wavelength coverage (2.4–197μm) obtained by combining observations made with the two spectrometers includes practically all of the flux emitted by the sources, and allows us to determine the emission and absorption featu...
متن کاملRotating models for evolved low-mass stars
Low mass stars (< 2-2.5M⊙) exhibit, at all the stages of their evolution, signatures of processes that require challenging modeling beyond the standard stellar theory. In this paper we focus on their peculiarities while they climb the red giant branch (RGB). We first compare the classical predictions for abundance variations due to the first dredge-up with observational data in various environm...
متن کاملCNO in evolved intermediate mass stars ⋆
In order to investigate the possible influence of rotation on the efficiency of the first dredge-up we determined atmospheric parameters, masses, and abundances of carbon, nitrogen, and oxygen in a sample of evolved intermediate mass stars. We used high resolution spectra and conducted a model atmosphere analysis. The abundances were calculated through spectral synthesis and compared to the pre...
متن کاملExtrasolar Planets and the Rotation and Axisymmetrical Mass Loss of Evolved Stars
I examine the implications of the recently found extrasolar planets on the planet-induced axisymmetrical mass loss model for the formation of elliptical planetary nebulae (PNs). This model, which was developed in several earlier papers by the author and a few collaborators, attributes low departure from spherical mass loss of upper asymptotic giant branch (AGB) stars to envelope rotation which ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2011
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201015829