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

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 639卷 / 01期

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.

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收藏

页码：L17 / L20

页数：4

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