A 22° Tidal Tail for Palomar 5

  • Grillmair C
  • Dionatos O
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Abstract

Using Data Release 4 of the Sloan Digital Sky Survey, we have applied an optimal contrast, matched filter technique to trace the trailing tidal tail of the globular cluster Palomar 5 to a distance of 18.5 degrees from the center of the cluster. This more than doubles the total known length of the tail to some 22 degrees on the sky. Based on a simple model of the Galaxy, we find that the stream's orientation on the sky is consistent at the 1.7 sigma level with existing proper motion measurements. We find that a spherical Galactic halo is adequate to model the stream over its currently known length, and we are able to place new constraints on the current space motion of the cluster.

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CITATION STYLE

APA

Grillmair, C. J., & Dionatos, O. (2006). A 22° Tidal Tail for Palomar 5. The Astrophysical Journal, 641(1), L37–L39. https://doi.org/10.1086/503744

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