首页> 外文期刊>The Astrophysical journal >PRIMUS + DEEP2: CLUSTERING OF X-RAY, RADIO, AND IR-AGNs AT z?~?0.7
【24h】

PRIMUS + DEEP2: CLUSTERING OF X-RAY, RADIO, AND IR-AGNs AT z?~?0.7

机译:PRIMUS + DEEP2:在z?〜?0.7时的X射线,无线电和IR-AGN的聚类

获取原文
获取外文期刊封面目录资料

摘要

We measure the clustering of X-ray, radio, and mid-IR-selected active galactic nuclei (AGNs) at using multi-wavelength imaging and spectroscopic redshifts from the PRIMUS and DEEP2 redshift surveys, covering seven?separate fields spanning ~10 deg 2 . Using the cross-correlation of AGNs with dense galaxy samples, we measure the clustering scale length and slope, as well as the bias, of AGNs selected at different wavelengths. Similar to previous studies, we find that X-ray and radio AGNs are more clustered than mid-IR-selected AGNs. We further compare the clustering of each AGN sample with matched galaxy samples designed to have the same stellar mass, star-formation rate (SFR), and redshift distributions as the AGN host galaxies and find no significant differences between their clustering properties. The observed differences in the clustering of AGNs selected at different wavelengths can therefore be explained by the clustering differences of their host populations, which have different distributions in both stellar mass and SFR. Selection biases inherent in AGN selection therefore?determine the clustering of observed AGN samples. We further find no significant difference between the clustering of obscured and unobscured AGNs, using IRAC or Wide-field Infrared Survey Explorer colors or X-ray hardness ratio.
机译:我们使用PRIMUS和DEEP2红移测量的多波长成像和光谱红移,测量X射线,射电和中红外选择的活动星系核(AGN)的聚类,涵盖七个跨越10 deg 2的独立场。使用AGN与密集银河样本的互相关性,我们可以测量在不同波长选择的AGN的聚类尺度长度和斜率以及偏差。与以前的研究类似,我们发现X射线和射电AGN比中红外选择的AGN更加聚集。我们进一步将每个AGN样本的聚类与设计为具有与AGN宿主星系相同的恒星质量,恒星形成率(SFR)和红移分布的匹配星系样本进行比较,发现它们的聚类性质之间没有显着差异。因此,在不同波长选择的AGN的聚类中观察到的差异可以通过其宿主群体的聚类差异来解释,它们在恒星质量和SFR中都有不同的分布。因此,AGN选择所固有的选择偏差决定了观察到的AGN样本的聚类。我们进一步发现,使用IRAC或广域红外Survey Explorer颜色或X射线硬度比,模糊和未模糊AGN的聚类之间没有显着差异。
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号