UBVI photometry of NGC 6872 clusters population Virtual Observatory Resource

Authors
  1. Bastian N.
  2. Hempel H.
  3. Kissler-Patig M.
  4. Homeier N.
  5. Trancho G.
  6. Published by
    CDS
Abstract

We present a photometric analysis of the rich star cluster population in the tidal tails of NGC 6872. We find star clusters with ages between 1-100Myr distributed in the tidal tails, while the tails themselves have an age of less than 150Myr. Most of the young massive (10^4^<=M/M_{sun}<=10^7^) clusters are found in the outer regions of the galactic disk or the tidal tails. The mass distribution of the cluster population can be well described by a power-law of the form N(m){prop.to}m^-alpha^, where alpha=1.85+/-0.11, in very good agreement with other young cluster populations found in a variety of different environments. We estimate the star formation rate for three separate regions of the galaxy, and find that the eastern tail is forming stars at ~2 times the rate of the western tail and ~5 times the rate of the main body of the galaxy. By comparing our observations with published N-body models of the fate of material in tidal tails in a galaxy cluster potential, we see that many of these young clusters will be lost into the intergalactic medium. We speculate that this mechanism may also be at work in larger galaxy clusters such as Fornax, and suggest that the so-called ultra-compact dwarf galaxies could be the most massive star clusters that have formed in the tidal tails of an ancient galactic merger.

Keywords
  1. stellar-associations
  2. infrared-photometry
  3. visible-astronomy
  4. Wide-band photometry
Bibliographic source Bibcode
2005A&A...435...65B
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/435/65
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/435/65
Document Object Identifer DOI
doi:10.26093/cds/vizier.34350065

Access

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/435/65
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/435/65
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/435/65
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IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
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https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/435/65/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/435/65/table2?

History

2005-05-05T13:25:39Z
Resource record created
2005-05-05T13:25:39Z
Created
2005-05-05T13:25:49Z
Updated

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