Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-25T16:13:31.587Z Has data issue: false hasContentIssue false
  • English
  • Français

Improved synthetic TP-AGB models

Published online by Cambridge University Press:  25 May 2016

P. Marigo
P. Marigo*
Affiliation:
Max-Planck-Institut für Astrophysik, Garching bei München, Germany

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present recent improvements and results of an extensive analysis of the TP-AGB phase performed by means of a synthetic model (Marigo 1998a, b; Marigo et al. 1998a, b). The improvements concern: i) the use of a homogeneous and accurate set of analytical relations (Wagenhuber & Groenewegen 1998); ii) a new treatment of envelope burning in the most massive TP-AGB stars (M > 3.5M⊙) to account for the possible break-down of the core mass-luminosity relation; iii) a better treatment of the third dredge-up to infer if and when the process takes place.

Extensive calculations of synthetic TP-AGB models have been carried out over the mass range (0.8M⊙ ÷ 5M⊙) and for three sets of initial metallicity (Z = 0.019, Z = 0.008, Z = 0.004). The formation of carbon stars is investigated addressing the following issues: a) the reproduction of the observed luminosity functions of carbons stars in both Magellanic Clouds, and b) the formation of very bright and optically obscured carbon stars.

Type
Part 1. Basic Facts, Structure, Evolution, Nucleosynthesis
Information
Symposium - International Astronomical Union , Volume 191: Asymptotic Giant Branch Stars , 1999 , pp. 53 - 58
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Baud, B., Habing, H.J., 1983, A&A 127, 73 Google Scholar
Blöcker, T., Schönberner, D., 1991, A&A 244, L43 (BS91) Google Scholar
Blöcker, T., 1995, A&A 297, 727 (B95) Google Scholar
Boothroyd, A.I., Sackmann, I.-J., 1988, ApJ 328, 671 Google Scholar
Costa, E., Frogel, J.A., 1996, AJ 112, 2607 Google Scholar
Frost, C.A., Cannon, R.C., Lattanzio, J.C., et al., 1998, A&A 332, L17 Google Scholar
Groenewegen, M.A.T., de Jong, T., 1993, A&A 267, 410 Google Scholar
Marigo, P., 1998a, PhD Thesis, University of Padova Google Scholar
Marigo, P., 1998b, A&A, in press Google Scholar
Marigo, P., Bressan, A., Chiosi, C., 1996, A&A 313, 545 Google Scholar
Marigo, P., Bressan, A., Chiosi, C., 1998a, A&A 331, 564 Google Scholar
Marigo, P., Girardi, L., Bressan, A., 1998b, A&A submitted Google Scholar
Rebeirot, E., Azzopardi, M., Westerlund, B.E., 1993, A&AS 97, 603 Google Scholar
Renzini, A., Voli, M., 1981, A&A 94, 175 Google Scholar
Vassiliadis, E., Wood, P.R., 1993, ApJ 413, 641 Google Scholar
Wagenhuber, J., Groenewegen, M.A.T., 1998, A&A 340, 183 Google Scholar
Wood, P.R., 1981, in Physical Processes in Red Giants, Iben, I. Jr. and Renzini, A. (eds.), D. Reidel Publishing Co., Dordrecht, p. 135 Google Scholar