2001A&A...366..578C


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.26CET05:58:03

2001A&A...366..578C - Astronomy and Astrophysics, volume 366, 578-584 (2001/2-1)

Asymptotic Giant Branch predictions: Theoretical uncertainties.

CASSISI S., CASTELLANI V., DEGL'INNOCENTI S., PIOTTO G. and SALARIS M.

Abstract (from CDS):

In this paper we investigate the level of agreement between observations and ``new" Asymptotic Giant Branch (AGB) models, as produced by updating the physical inputs adopted in previous stellar computations. One finds that the new physics increases the predicted luminosity of Horizontal Branch (HB) and AGB stellar structures by a similar amount, keeping unchanged the predictions about the difference in luminosity between these two evolutionary phases. The best fit of selected globular clusters appears rather satisfactory, disclosing the relevance of the assumption on the mass of the Red Giant Branch (RGB) progenitor in assessing the distance modulus of moderately metal rich clusters. The still existing uncertainties related either to the input physics or to the efficiency of some macroscopic mechanisms, like convection or microscopic diffusion, are critically discussed, ruling out the occurrence of the so called ``breathing pulses" during the central He exhaustion, in agreement with earlier suggestions.

Abstract Copyright:

Journal keyword(s): stars: AGB - stars: evolution - stars: Hertzsprung-Russel diagram

Simbad objects: 2

goto Full paper

goto View the reference in ADS

Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3575 0
2 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1782 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001A&A...366..578C and select 'bookmark this link' or equivalent in the popup menu


2020.10.26-05:58:03

© Université de Strasbourg/CNRS

    • Contact