HST observations of old clusters in the LMC Virtual Observatory Resource

Authors
  1. Johnson J.A.
  2. Bolte M.
  3. Stetson P.B.
  4. Hesser J.E.
  5. Somerville R.S.
  6. Published by
    CDS
Abstract

We present V, V-I color-magnitude diagrams (CMDs) for three old star clusters in the Large Magellanic Cloud (LMC): NGC 1466, NGC 2257, and Hodge 11. Our data extend {~}3 mag below the main-sequence turnoff, allowing us to determine accurate relative ages and the blue straggler frequencies. Based on a differential comparison of the CMDs, any age difference between the three LMC clusters is less than 1.5 Gyr. Comparing their CMDs to those of M92 and M3, the LMC clusters, unless their published metallicities are significantly in error, are the same age as the old Galactic globulars. The similar ages to Galactic globulars are shown to be consistent with hierarchical clustering models of galaxy formation. The blue straggler frequencies are also similar to those of Galactic globular clusters. We derive a true distance modulus to the LMC of (m - M)_0_ = 18.46 {+/-} 0.09 [assuming (m - M)_0_ = 14.61 for M92] using these three LMC clusters.

Keywords
  1. globular-star-clusters
  2. hertzsprung-russell-diagram
  3. magellanic-clouds
  4. photometry
Bibliographic source Bibcode
1999ApJ...527..199J
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/527/199
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/527/199
Document Object Identifer DOI
doi:10.26093/cds/vizier.15270199

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/527/199
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/527/199
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/527/199
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

2000-03-16T10:14:22Z
Resource record created
2000-03-16T09:14:34Z
Updated
2000-03-16T10:14:22Z
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