论文标题
矮星系中中红外选择AGN的困难
Difficulties in Mid-Infrared selection of AGN in dwarf galaxies
论文作者
论文摘要
尽管众所周知，众所周知，巨大的黑洞（MBH）居住在所有巨大的星系中，但尚未确认它们在矮星系中的无处不在，迄今为止仅发现有限的来源。最近，一些研究提出，基于类似的方法通常应用于类星体，拟议的红外发射是识别矮人中MBHS的另一种方法。在这项研究中，通过将光学和红外数据相结合，考虑到解决方案的效果和源重叠，我们详细研究了这种方法与当前基于地面的设施的可能局限性，发现在中间方面的DWARFS中发现了相当低的（$ \ sim $ \ sim $ 0.4）的活性MBH，与以前的几个结果相一致。我们的结果表明，红外选择受到了几种局限性的强烈影响，这些局限性使目前令人难以置信的矮人星系中MBHS的鉴定，尤其是因为与光学调查相比的分辨率非常差，并且可能受到附近来源的污染，尽管我们发现一些值得进一步随访的好候选人。因此，光学，X射线和无线电观察结果仍然代表了在矮人中搜索MBH的最安全方法。
While massive black holes (MBHs) are known to inhabit all massive galaxies, their ubiquitous presence in dwarf galaxies has not been confirmed yet, with only a limited number of sources detected so far. Recently, some studies proposed infrared emission as an alternative way to identify MBHs in dwarfs, based on a similar approach usually applied to quasars. In this study, by accurately combining optical and infrared data taking into account resolution effects and source overlapping, we investigate in detail the possible limitations of this approach with current ground-based facilities, finding a quite low ($\sim$0.4 per cent) fraction of active MBH in dwarfs that are luminous in mid-infrared, consistent with several previous results. Our results suggest that the infrared selection is strongly affected by several limitations that make the identification of MBHs in dwarf galaxies currently prohibitive, especially because of the very poor resolution compared to optical surveys, and the likely contamination by nearby sources, although we find a few good candidates worth further follow-ups. Optical, X-ray and radio observations, therefore, still represent the most secure way to search for MBH in dwarfs.
