The Galactic distribution of asymptotic giant branch stars
نویسندگان
چکیده
منابع مشابه
The Galactic Distribution of Asymptotic Giant Branch Stars
We study the Galactic distribution of ∼10,000 Asymptotic Giant Branch (AGB) stars selected by IRAS colors and variability index. The distance to each star is estimated by assuming a narrow luminosity function and a model-derived bolometric correction. The characteristic AGB star luminosity, LAGB, is determined from the condition that the highest number density must coincide with the Galactic bu...
متن کاملNucleosynthesis in asymptotic giant branch stars
The nucleosynthesis in asymptotic giant branch stars (briefly: AGB)is a challenging and fascinating subject in the theory of stellar evolution and important for observations as well. This is because about of half the heavy elements beyond iron are synthesized during thermal pulsation phases of these stars. Furthermore, the understanding of the production of the heavy elements and some light ele...
متن کاملBackflow in Post-asymptotic Giant Branch Stars
We derive the conditions for a backflow toward the central star(s) of circumstellar material to occur during the post-asymptotic giant branch (AGB) phase. The backflowing material may be accreted by the post-AGB star and/or its companion, if such exists. Such a backflow may play a significant role in shaping the descendant planetary nebula, by, among other things, slowing down the post-AGB evol...
متن کاملSodium production in asymptotic giant branch stars
A new scenario is presented for the production of 23Na in asymptotic giant branch (AGB) stars. The scenario takes advantage of the periodic third dredge-up episodes characterizing those stars, which mix primary 12C from their intershell layers to their surface. Two successive interpulse/pulse/dredgeup sequences are then required to produce 23Na. During the first sequence carbon and oxygen are c...
متن کاملMagnetic Flares on Asymptotic Giant Branch Stars
We investigate the consequences of magnetic flares on the surface of asymptotic giant branch (AGB) and similar stars. In contrast to the solar wind, in the winds of AGB stars the gas cooling time is much shorter than the outflow time. As a result, we predict that energetic flaring should enhance, rather than inhibit, dust formation around AGB stars. Analysis of an archival ROSAT X-ray spectrum ...
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: 2002
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.2002.05980.x