Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· On-line Data
· References in the article
· Citations to the Article (330) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (3)
· Associated Articles
· Also-Read Articles (Reads History)
· HEP/Spires Information
·
· Translate This Page
Title:
Oxygen-enhanced models for globular cluster stars. II - Isochrones and luminosity functions
Authors:
Bergbusch, Peter A.; Vandenberg, Don A.
Affiliation:
AA(Regina, University, Canada), AB(Victoria, University, Canada)
Publication:
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 81, no. 1, July 1992, p. 163-220. Research supported by NSERC and University of Regina. (ApJS Homepage)
Publication Date:
07/1992
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Globular Clusters, Oxygen, Stellar Luminosity, Stellar Models, Color-Magnitude Diagram, Computational Astrophysics, Stellar Evolution, Stellar Spectrophotometry
DOI:
10.1086/191690
Bibliographic Code:
1992ApJS...81..163B

Abstract

An extensive grid of isochrones and luminosity functions (LFs) for iron abundances in the range -2.26 to -0.47, current best estimates of the helium and oxygen contents, and ages from 5-8 Gyr to 18 Gyr are presented. A novel interpolation code is used to generate the isochrones and LFs. Comparisons of the isochrones are made with the observed fiducial sequences for a few Galactic globular clusters (GCs) and with a number of the Population II subdwarf standards that have accurate parallax-based distances to demonstrate that they are consistent with these data within current uncertainties. Illustrative fits of the computed luminosity functions, which are provided for several power-law mass functions, to the observed LFs recently reported in the literature for M92, M13, and 47 Tuc are also presented and discussed. The calculations are extensively tabulated and should be particularly useful for determining the ages of the GCs, and for population synthesis analysis, given that they are predicted for the entire magnitude range of -3 to 12.

Associated Articles

Part  1     Part  2     Part  3    


Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


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

  New!

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