arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1312.5380astro-ph.GA
收藏

具有WISE的AGN环面性质

AGN torus properties with WISE

Robert Nikutta, Maia Nenkova, Zeljko Ivezic, Nicholas Hunt-Walker, Moshe Elitzur

摘要:

广域红外巡天探测器(WISE)以前所未有的灵敏度在3.4、4.6、12和22微米四个红外波段扫描了整个天空。WISE点源目录包含超过5.6亿个天体,其中包括数十万个具有活动核(AGN)的星系。虽然1型活动星系核由于其明亮和无遮蔽的性质,很容易被探测到,并构成了一个相当完整和无偏的样本,但它们的2型对应物,由活动星系核统一假设,并不那么容易识别。匹配的WISE目录与已知的类星体在斯隆数字巡天,我们确认以前的识别类型1轨迹的WISE颜色空间。使用一个非常大的数据库的流行CLUMPY环面模型,我们找到了假定的2型对应物的颜色,也是第一次,预测他们的数量与通量的关系,可以预期在任何给定的WISE颜色范围内观察到。这将允许我们对环面参数施加统计上非常重要的约束。我们的结果是一个成功的测试活动星系核统一计划。

英文摘要:

The Wide-field Infrared Survey Explorer (WISE) has scanned the entire sky with unprecedented sensitivity in four infrared bands, at 3.4, 4.6, 12, and 22 micron. The WISE Point Source Catalog contains more than 560 million objects, among them hundreds of thousands of galaxies with Active Nuclei (AGN). While type 1 AGN, owing to their bright and unobscured nature, are easy to detect and constitute a rather complete and unbiased sample, their type 2 counterparts, postulated by AGN unification, are not as straightforward to identify. Matching the WISE catalog with known QSOs in the Sloan Digital Sky Survey we confirm previous identification of the type 1 locus in the WISE color space. Using a very large database of the popular CLUMPY torus models, we find the colors of the putative type 2 counterparts, and also, for the first time, predict their number vs. flux relation that can be expected to be observed in any given WISE color range. This will allow us to put statistically very significant constraints on the torus parameters. Our results are a successful test of the AGN unification scheme.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑