NGC 2213 BR photometry Virtual Observatory Resource

Authors
  1. Da Costa G.S.
  2. Mould J.R.
  3. Crawford M.D.
  4. Published by
    CDS
Abstract

The age of the LMC red globular cluster NGC 2213 has been estimated as 1.3+/-0.5x10^9^yr from a color-magnitude diagram, derived from CCD photometry, that reveals the cluster main sequence. The accuracy of the age estimate, however, is limited by uncertainly in the LMC distance modulus, by uncertainty in the cluster metal abundance which appears to lie in the range one-half to one-sixth solar, by uncertainty in the reddening of the cluster, and by uncertainty in the extent to which the theoretical isochrones used for the age dating are affected by the neglect, in standard stellar models, of the interior mixing caused by convective overshoot in the stellar cores. Using the adopted reddening of E(B-V)=0.09 and assuming Y=0.2, isochrone best fits to the cluster main sequence are found for [M/H]=-0.3 if (m-M)0=18.7 and for [M/H]=-0.7 if (m-M)0=18.2. After allowance for the possible effects of convective overshoot, the corresponding ages are 0.9^+0.5^_-0.3_ and 1.6^+0.8_^-0.4_x10^9^yr. Plausible alterations in the adopted reddening value and the adopted helium abundance also yield ages within these limits.

Keywords
  1. magellanic-clouds
  2. globular-star-clusters
  3. ccd-photometry
Bibliographic source Bibcode
1985ApJ...297..582D
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/297/582
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/297/582
Document Object Identifer DOI
doi:10.26093/cds/vizier.12970582

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/297/582
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/297/582
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/297/582
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

1997-12-09T20:45:30Z
Resource record created
1997-12-09T19:45:35Z
Updated
1997-12-09T20:45:30Z
Created

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr