Substructure in the Fornax dSph Galaxy:: A possible merger remnant

被引：0
|
作者：
Coleman, M [1 ]
Da Costa, GS [1 ]
Martínez-Delgado, D [1 ]
Bland-Hawthorn, J [1 ]
机构：
[1] Australian Natl Univ, Inst Adv Studies, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia
来源：
Satellites and Tidal Streams | 2004年 / 327卷
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present initial results from a wide field photometric survey of the Fornax dwarf spheroidal (dSph) galaxy, concentrating on a small overdensity of stars located approximately 15' (500 pc in projection) from the centre of Fornax. An analysis of two sets of CCD data in four bands implies the clump has a luminosity of similar to 10(3) M-circle dot and is similar to 2 Cyr old. Our preferred interpretation is that the overdensity represents a merger between Fornax and a smaller, gas-rich system that occurred approximately 2 Gyr ago.
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页码：173 / 177
页数：5
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