High mass-loss asymptotic giant branch stars detected by the Midcourse Space Experiment in the ‘intermediate’ and ‘outer’ Galactic bulge
نویسندگان
چکیده
منابع مشابه
High mass - loss AGB stars detected by MSX in the “ intermediate ” and “ outer ” Galactic bulge
We present a study of MSX point sources in the Galactic bulge (|l| < 3, 1 < |b| < 5), observed at A, C, D and E-band (8 to 21 μm), with a total area ∼ 48 deg and more than 7000 detected sources in the MSX D-band (15 μm). We discuss the nature of the MSX sources (mostly AGB stars), their luminosities, the interstellar extinction, the mass-loss rate distribution and the total mass-loss rate in th...
متن کاملMass loss of stars on the asymptotic giant branch
As lowand intermediate-mass stars reach the asymptotic giant branch (AGB), they have developed into intriguing and complex objects that are major players in the cosmic gas/dust cycle. At this stage, their appearance and evolution are strongly affected by a range of dynamical processes. Large-scale convective flows bring newlyformed chemical elements to the stellar surface and, together with pul...
متن کاملNucleosynthesis in Intermediate-Mass Asymptotic Giant Branch Stars
We summarise the main properties of Asymptotic Giant Branch stars, including their structure, evolution and nucleosynthesis. The main physical mechanisms are outlined, as are the uncertainties. In keeping with the multi-disciplinary nature of this meeting, this paper is designed for those who are not experts in stellar structure. 1 What Is An AGB Star? Most stars will pass through the Asymptoti...
متن کاملCrystallinity versus mass-loss rate in Asymptotic Giant Branch stars
Infrared Space Observatory (ISO) observations have shown that O-rich Asymptotic Giant Branch (AGB) stars exhibit crystalline silicate features in their spectra only if their mass-loss rate is higher than a certain threshold value. Usually, this is interpreted as evidence that crystalline silicates are not present in the dust shells of low mass-loss rate objects. In this study, radiative transfe...
متن کاملMass loss on the Asymptotic Giant Branch
Mass loss on the Asymptotic Giant Branch provides the origin of planetary nebulae. This paper reviews several relevant aspects of AGB evolution: pulsation properties, mass loss formalisms and time variable mass loss, evidence for asymmetries on the AGB, binarity, ISM interaction, and mass loss at low metallicity. There is growing evidence that mass loss on the AGB is already asymmetric, but wit...
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: Monthly Notices of the Royal Astronomical Society
سال: 2007
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2007.12320.x