AAS 199th meeting, Washington, DC, January 2002
Session 79. Star Clusters
Oral, Tuesday, January 8, 2002, 2:00-3:30pm, Jefferson East

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[79.05] A Matched Filter Analaysis of the Tidal Tails of Pal 5

C. M. Rockosi (University of Washington)

I present a matched-filter analysis of the tidal tails around the globular cluster Palomar 5. Of the total number of Pal 5 stars detected both within the cluster's tidal radius and in the tails, 45% are out in the tails. The tails are found as the only statistical overdensity of cluster stars over a 41 square degree area of the SDSS photometric catalogs, and the performance of matched filter as a detection method for stellar populations is discussed in this context. The annular-averaged density of stars along the tails is fit to a power-law in radius with best-fit index -1.58, significantly steeper than that predicted from a constant orbit-averaged mass-loss rate.


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