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The luminosity function of Palomar 5 and Its tidal tails

Research output: Contribution to journalJournal article

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  • Andreas Koch
  • Michael Odenkirchen
  • E. K. Grebel
  • D. Martinez-Delgado
  • John A. R. Caldwell
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<mark>Journal publication date</mark>2004
<mark>Journal</mark>ASP Conference Series
Volume327
Number of pages4
Pages (from-to)333-336
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We present the main sequence luminosity function of the tidally disrupted globular cluster Palomar 5 and its tidal tails. For this work we analyzed imaging data obtained with the Wide Field Camera at the INT (La Palma) and data from the Wide Field Imager at the MPG/ESO 2.2 m telescope at La Silla down to a limiting magnitude of approximately 24.5 mag in B. Our results indicate that preferentially fainter stars were removed from the cluster so that the LF of the cluster's main body exhibits a significant degree of flattening compared to other GCs. This is attributed to its advanced dynamical evolution. The LF of the tails is, in turn, enhanced with faint, low mass stars, which we interpret as a consequence of mass segregation in the cluster.