منابع مشابه
Stellar Populations : High Spectral Resolution Libraries . Improved TP - AGB Treatment
I present a short description of the STELIB, HNGSL, IndoUS, MILES, ELODIE, UVES-POP, and IRTF libraries of empirical stellar spectra and show some applications of their use in population synthesis models. When new calculations of the TP-AGB evolutionary phase for stars of different mass and metallicity are included in population synthesis models, the stellar mass in galaxies at z from 1 to 3 de...
متن کاملTP-AGB stars with envelope burning
In this paper we focus on the TP-AGB evolution of intermediate-mass stars experiencing envelope burning (M = 4÷5M⊙). Our model of the TP-AGB phase is suitably designed to follow the peculiar behaviour of these stars, to which the simple analytical treatment valid in the low-mass range can no longer be applied. The approach we have adopted is a semi-analytical one as it combines analytical relat...
متن کاملCS 30322 - 023 : an ultra metal - poor TP - AGB star ? ⋆
Context. The remarkable properties of CS 30322-023 became apparent during the course of a high-resolution spectroscopic study of a sample of 23 carbon-enhanced, metal-poor (CEMP) stars. Aims. This sample is studied in order to gain a better understanding of sand r-process nucleosynthesis at low metallicity, and to investigate the role of duplicity. Methods. High-resolution UVES spectra have bee...
متن کاملSynthetic photometry of M-type AGB stars with JWST & WISE
In this study we present a data set of synthetic photometry of M-type AGB stars for JWST, WISE and a lter set that will be referred to as the generic lter set, consisting of: UX BX B V R I J J2m H H2m Ks2m K L L’ M M’. 106 di erent models compromised of 4741 spectra have been processed for the three lter sets. We have also tted the models to eight observations of M-type AGB stars made by WISE, ...
متن کاملMass Loss Evolution and the Formation of Detached Shells around TP-AGB Stars
Context. The origin of the so called ’detached shells’ around AGB stars is not fully understood, but two common hypotheses state that these shells form either through the interaction of distinct wind phases or an eruptive mass loss associated with a He-shell flash. We present a model of the formation of detached shells around thermal pulse asymptotic giant branch (TP-AGB) stars, based on detail...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1999
ISSN: 0074-1809
DOI: 10.1017/s007418090020288x