CADIS has seen the Virgo overdensity and parts of the Monoceros and " Orphan" streams in retrospect (Research Note)

被引:3
作者
Fuchs, B.
Phleps, S.
Meisenheimer, K.
机构
[1] Univ Heidelberg, Zentrum Astron, Astron Rechen Inst, D-69120 Heidelberg, Germany
[2] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
[3] Max Planck Inst Astron, D-69117 Heidelberg, Germany
关键词
galaxy : stellar content; galaxy : structure;
D O I
10.1051/0004-6361:20065698
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We reanalyze deep star counts in five CADIS fields. The data are presented as vertical density distributions of stars perpendicular to the Galactic plane. In three fields the profiles are consistent with each other, while in two fields significant overdensities of stars are found. The overdensity in one field can be associated with the Virgo overdensity which can be traced right into the disk of the Milky Way. Using this detection we estimate the mass of the Virgo overdensity and show that this is equivalent to the stellar content of a Local Group dwarf spheroidal galaxy. The overdensity in the second field is more difficult to associate with a previously known overdensity. We suggest that it is related both to the Monoceros stream and the recently discovered Orphan stream.
引用
收藏
页码:541 / 543
页数:3
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