在COSMOS场中追寻高度遮蔽的类星体
天体物理学
2014-11-18 v1
摘要
(删节版)我们利用COSMOS场中钱德拉和斯皮策望远镜对大面积（超过钱德拉深场CDFs覆盖面积的10倍）的深度覆盖，将高度遮蔽的康普顿厚活动星系核的搜索扩展到更高光度。这些源具有低面密度，只有通过大面积巡天（如COSMOS巡天）才能获得大样本。我们分析了24m流量高于550Jy的COSMOS MIPS源的X射线性质。对于钱德拉图像中未直接探测到的MIPS源，我们在软X射线和硬X射线波段生成叠加图像。为了估计MIPS源群中康普顿厚AGN的比例，我们将观测到的叠加计数率和硬度比与包含遮蔽AGN和恒星形成星系的详细蒙特卡洛模拟预测值进行比较。在处，较低光度康普顿厚AGN（logL(2-10keV)=43.5-44）的密度为 Mpc，相当于X射线选择AGN密度的。在高光度和低光度下，红外选择的康普顿厚AGN与X射线选择的无遮蔽和中等遮蔽AGN的比例比较表明，康普顿厚AGN遵循与康普顿薄AGN类似的光度依赖性，在高光度下变得相对稀少。我们估计AGN（无遮蔽、中等遮蔽和康普顿厚）占MIPS源群总数的比例为，该值显著高于先前在类似24m流量下的估计。我们讨论了我们的发现如何约束AGN反馈模型。
引用
@article{arxiv.0810.0720,
title = {Chasing highly obscured QSOs in the COSMOS field},
author = {F. Fiore and S. Puccetti and M. Brusa and M. Salvato and G. Zamorani and T. Aldcroft and H. Ausse and H. Brunner and P. Capak and N. Cappelluti and F. Civano and A. Comastri and M. Elvis and C. Feruglio and A. Finoguenov and A. Fruscione and R. Gilli and G. Hasinger and A. Koekemoer and J. Kartaltepe and O. Ilbert and C. Impey and E. Le Floc'h and S. Lilly and V. Mainieri and A. Martinez-Sansigre and H. J. McCracken and N. Menci and A. Merloni and T. Miyaji and D. B. Sanders and M. Sargent and E. Schinnerer and N. Scoville and J. Silverman and V. Smolcic and A. Steffen and P. Santini and Y. Taniguchi and D. Thompson and J. R. Trump and C. Vignali and M. Urry and L. Yan},
journal= {arXiv preprint arXiv:0810.0720},
year = {2014}
}
备注
Paper submitted to ApJ. This is the revised version after all referee's comments have been addressed