Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0711.4922)
· On-line Data
· References in the article
· Citations to the Article (141) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (6)
· Associated Articles
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Evolution of asymptotic giant branch stars. II. Optical to far-infrared isochrones with improved TP-AGB models
Authors:
Marigo, P.; Girardi, L.; Bressan, A.; Groenewegen, M. A. T.; Silva, L.; Granato, G. L.
Affiliation:
AA(Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, 35122 Padova, Italy ), AB(Osservatorio Astronomico di Padova - INAF, Vicolo dell'Osservatorio 5, 35122 Padova, Italy), AC(Osservatorio Astronomico di Padova - INAF, Vicolo dell'Osservatorio 5, 35122 Padova, Italy ; INAOE, Luis Enrique Erro 1, 72840 Tonantzintla, Puebla, Mexico), AD(Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, 3001 Leuven, Belgium), AE(Osservatorio Astronomico di Trieste - INAF, via Tiepolo 11, 34131 Trieste, Italy), AF(Osservatorio Astronomico di Padova - INAF, Vicolo dell'Osservatorio 5, 35122 Padova, Italy)
Publication:
Astronomy and Astrophysics, Volume 482, Issue 3, 2008, pp.883-905 (A&A Homepage)
Publication Date:
05/2008
Origin:
EDP Sciences
Keywords:
astronomical data bases: miscellaneous, stars: AGB and post-AGB, stars: carbon, stars: evolution, galaxies: Magellanic Clouds, stars: Hertzsprung-Russell (HR) and C-M diagrams
DOI:
10.1051/0004-6361:20078467
Bibliographic Code:
2008A&A...482..883M

Abstract

We present a large set of theoretical isochrones, whose distinctive features mostly reside on the greatly-improved treatment of the thermally-pulsing asymptotic giant branch (TP-AGB) phase. Essentially, we have coupled the TP-AGB tracks described in Paper I, at their stages of pre-flash quiescent H-shell burning, with the evolutionary tracks for the previous evolutionary phases from Girardi et al. (2000, A&AS, 141, 371). Theoretical isochrones for any intermediate value of age and metallicity are then derived by interpolation in the grids. We take care that the isochrones keep, to a good level of detail, the several peculiarities present in these TP-AGB tracks - e.g., the cool tails of C-type stars owing to the use of proper molecular opacities as convective dredge-up occurs along the TP-AGB; the bell-shaped sequences in the Hertzsprung-Russell (HR) diagram for stars with hot-bottom burning; the changes of pulsation mode between fundamental and first overtone; the sudden changes of mean mass-loss rates as the surface chemistry changes from M- to C-type; etc. Theoretical isochrones are then converted to about 20 different photometric systems - including traditional ground-based systems, and those of recent major wide-field surveys such as SDSS, OGLE, DENIS, 2MASS, UKIDSS, etc., - by means of synthetic photometry applied to an updated library of stellar spectra, suitably extended to include C-type stars. Finally, we correct the predicted photometry for the effect of circumstellar dust during the mass-losing stages of the AGB evolution, which allows us to improve the results for the optical-to-infrared systems, and to simulate mid- and far-IR systems such as those of Spitzer and AKARI. We illustrate the most striking properties of these isochrones by means of basic comparisons with observational data for the Milky Way disc and the Magellanic Clouds. Access to the data is provided both via a web repository of static tables (http://stev.oapd.inaf.it/dustyAGB07 and CDS), and via an interactive web interface (http://stev.oapd.inaf.it/cmd), which provides tables for any intermediate value of age and metallicity, for several photometric systems, and for different choices of dust properties.

Associated Articles

Part 1     Part  2    

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints