The detection of a 45° tidal stream associated with the globular cluster NGC 5466

被引:136
作者
Grillmair, CJ
Johnson, R
机构
[1] Spitzer Sci Ctr, Pasadena, CA 91125 USA
[2] Calif State Univ Long Beach, Dept Phys & Astron, Long Beach, CA 90840 USA
关键词
galaxy : halo; galaxy : structure; globular clusters : general; globular clusters : individual (NGC 5272; NGC; 5466);
D O I
10.1086/501439
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report on the detection in Sloan Digital Sky Survey data of a 45 degrees 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 degrees.4. 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.
引用
收藏
页码:L17 / L20
页数:4
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