ON THE POPULATION OF H-I DWARF GALAXIES
ON THE POPULATION OF H-I DWARF GALAXIES
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关于 H-I 矮星系的数量
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
J. Gorkom
中科院分区：
文献类型：
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作者：
D. Weinberg;A. Szomoru;P. Guhathakurta;J. Gorkom
我们报告的结果从21厘米的调查领域的英仙座双鱼座超星系团和前景的空白，这是为了寻找富含气体的矮星系或光学昏暗的H I云的质量M（HI）大于或类似于10（8）M。我们在超星系团中探测到了16个天体，其中9个以前未被编目。我们没有发现任何物体在虚空领域，H I矮星系遵循明亮星系定义的空间结构的一个迹象，虽然我们的结果不排除一个适度的“偏见”之间的矮星系和明亮的星系。探测到的星系数量比从光学光度函数的简单外推所预期的要少。这些数据没有留下大量的H I矮星或富含气体的低表面亮度巨星的空间，这些巨星可能会被传统的光学星系目录遗漏。
We report results from a 21 cm survey of fields in the Perseus-Pisces supercluster and a foreground void, which was designed to find gas-rich dwarf galaxies or optically faint H I clouds with masses M(HI) greater-than-or-similar-to 10(8) M.. We detected 16 objects in the supercluster, nine of them previously uncataloged. We found no objects in the void fields, an indication that H I dwarf galaxies follow the spatial structure defined by bright galaxies, although our results do not rule out a moderate "bias" between dwarfs and bright galaxies. The number of galaxies detected is smaller than expected from a simple extrapolation of the optical luminosity function. These data leave no room for a substantial population of H I dwarfs or gas-rich, low surface brightness giants that could have been missed by conventional, optical galaxy catalogs.