Solo dwarfs II: the stellar structure of isolated Local Group dwarf galaxies
Solo dwarfs II: the stellar structure of isolated Local Group dwarf galaxies
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DOI：
10.1093/mnras/stab002
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发表时间：
2021-01
期刊：
影响因子：
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通讯作者：
C. Higgs;A. McConnachie;N. Annau;M. Irwin;G. Battaglia;P. Cot'e;G. Lewis;K. Venn
中科院分区：
文献类型：
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作者：
C. Higgs;A. McConnachie;N. Annau;M. Irwin;G. Battaglia;P. Cot'e;G. Lewis;K. Venn
孤星系巡天（Solo Dwarf Galaxy survey）是一个体积有限的宽视场g−和i−波段巡天，观测所有已知的附近（距离银河或M31 300 kpc）矮星系。这一组44个侏儒进行了同质分析，以定量比较的卫星侏儒人口的theMilkyWay和M31。本文分析了从北方半球可以观测到的12个最近的Solo矮星系，包括它们的距离、空间分布、形态和扩展结构，包括它们的内部积分光特性和外部分辨星星分布。所有12个星系都被发现可以用二维的Sérsic函数很好地描述，尽管UGC 4879特别显示了两个不同组成部分的初步证据。没有突出的扩展恒星子结构，这可能是微弱的卫星或最近的合并的迹象，被确定在任何系统的外部区域检查。
The Solo (Solitary Local) Dwarf Galaxy survey is a volume limited, wide-field g− and i−band survey of all knownnearby (300 kpc from theMilkyWayorM31) dwarf galaxies. This set of 44 dwarfs are homogeneously analysed for quantitative comparisons to the satellite dwarf populations of theMilkyWay andM31. In this paper, an analysis of the 12 closest Solo dwarf galaxies accessible from the northern hemisphere is presented, including derivation of their distances, spatial distributions, morphology, and extended structures, including their inner integrated light properties and their outer resolved star distributions. All 12 galaxies are found to be reasonably well described by two-dimensional Sérsic functions, although UGC 4879 in particular shows tentative evidence of two distinct components. No prominent extended stellar substructures, that could be signs of either faint satellites or recent mergers, are identified in the outer regions of any of the systems examined.