期刊
ASTRONOMY & ASTROPHYSICS
卷 477, 期 1, 页码 139-145出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20078392
关键词
galaxy : structure; galaxy : halo; galaxies : dwarf; local group
Aims. Sloan Digital Sky Survey (SDSS) DR5 photometric data with 120 degrees < alpha < 270 degrees, 25 degrees < delta < 70 degrees were searched for new Milky Way companions or substructures in the Galactic halo. Methods. Five candidates are identified as overdense faint stellar sources that have color-magnitude diagrams similar to those of known globular clusters, or dwarf spheroidal galaxies. The distance to each candidate is estimated by fitting suitable stellar isochrones to the color-magnitude diagrams. Geometric properties and absolute magnitudes are roughly measured and used to determine whether the candidates are likely dwarf spheroidal galaxies, stellar clusters, or tidal debris. Results. SDSSJ1000+5730 and SDSSJ1329+2841 are probably faint dwarf galaxy candidates while SDSSJ0814+5105, SDSSJ0821+5608, and SDSSJ1058+2843 are very likely extremely faint globular clusters. Conclusions. Follow-up study is needed to confirm these candidates.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据