Detection of a 45 Degree Tidal Stream Associated with the Globular Cluster NGC 5466

Details Detection of a 45 Degree Tidal Stream Associated with the Globular Cluster NGC 5466 Detection of a 45 Degree Tidal Stream Associated with the Globular Cluster NGC 5466

2006-02-27

arxiv.org/abs/astro-ph/0602602v1

Astrophys.J.639:L17-L20,2006

Astronomy and Astrophysics

Astrophysics

11 pages, 2 figures, published in ApJ Letters

Scientific paper

10.1086/501439

We report on the detection in Sloan Digital Sky Survey data of a 45 degree tidal stream of stars, extending from Bootes to Ursa Major, which we associate with the halo globular cluster NGC 5466. Using an optimal contrast, matched filter technique, we find a long, almost linear stellar stream with an average width of 1.4 degrees. The stream is an order of magnitude more tenuous than the stream associated with Palomar 5. The stream's orientation on the sky is consistent to a greater or lesser extent with existing proper motion measurements for the cluster.

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