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arXiv 1505.05487astro-ph.GAastro-ph.CO
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斯巴鲁-XMM-牛顿深度勘测(SXDS)VIII .:X射线源的多波长鉴别、光学/近红外光谱特性和光度红移

The Subaru-XMM-Newton Deep Survey (SXDS) VIII.: Multi-wavelength Identification, Optical/NIR Spectroscopic Properties, and Photometric Redshifts of X-ray Sources

Masayuki Akiyama, Yoshihiro Ueda, Mike G. Watson, Hisanori Furusawa, Tadafumi Takata, Chris Simpson, Tomoki Morokuma, Toru Yamada, Kouji Ohta, Fumihide Iwamuro,… 展开作者

Masayuki Akiyama, Yoshihiro Ueda, Mike G. Watson, Hisanori Furusawa, Tadafumi Takata, Chris Simpson, Tomoki Morokuma, Toru Yamada, Kouji Ohta, Fumihide Iwamuro, Kiyoto Yabe, Naoyuki Tamura, Yuuki Moritani, Naruhisa Takato, Masahiko Kimura, Toshinori Maihara, Gavin Dalton, Ian Lewis, Hanshin Lee, Emma Curtis Lake, Edward Macaulay, Frazer Clarke, John D. Silverman, Scott Croom, Masami Ouchi, Hitoshi Hanami, J. Diaz Tello, Tomohiro Yoshikawa, Naofumi Fujishiro, Kazuhiro Sekiguchi

摘要:

本文报道了利用Subaru-XMM-Newton深度调查(SXDS)中发现的X射线源的多波长识别。我们利用覆盖了远紫外到中红外波长范围的深度成像数据,通过对R波段、3.6微米、近紫外、近红外、近红外和远红外波段的探测数据应用似然比方法来选择每个X射线源的主要对应源。和24微米源星表以及在1.4GHz射电和i '波段变率巡天中选出的活动星系核候选者的匹配星表。一旦除去银河系恒星、附近星系中的超亮X射线源和星系团的候选者,样本中就有896个活动星系核候选者。我们利用光学和近红外多目标光谱仪对活动星系核进行了光谱观测,发现了65%的活动星系核候选者的X射线光谱。对于其余的X射线活动星系核候选者,我们用15个波段的光度数据估算了它们的光度红移。利用大样本的X射线选择活动星系核的多波长光度数据,我们估算了窄线活动星系核的宿主星系的恒星质量M*。恒星质量的分布在z=0.1到4.0之间是非常恒定的。M* 与2- 10 keV光度的关系可用黑洞质量与M* 关系的强宇宙学演化来解释。我们还评估了X射线活动星系核的紫外-中红外光谱能量分布(SED)的散射作为X射线亮度和吸收到核的函数。散射进行了比较与星系的红移和恒星质量分布与X射线活动星系核相匹配。被遮蔽的X射线活动星系核的紫外-近红外辐射强度与匹配样品中的星系相似。在近红外-中红外波段,X射线活动星系核的中位散射强度较红,但匹配样本中X射线活动星系核的散射强度与星系的散射强度大致重叠。

英文摘要:

We report the multi-wavelength identification of the X-ray sources found in the Subaru-XMM-Newton Deep Survey (SXDS) using deep imaging data covering the wavelength range between the far-UV to the mid-IR. We select a primary counterpart of each X-ray source by applying the likelihood ratio method to R-band, 3.6micron, near-UV, and 24micron source catalogs as well as matching catalogs of AGN candidates selected in 1.4GHz radio and i'-band variability surveys. Once candidates of Galactic stars, ultra-luminous X-ray sources in a nearby galaxy, and clusters of galaxies are removed there are 896 AGN candidates in the sample. We conduct spectroscopic observations of the primary counterparts with multi-object spectrographs in the optical and NIR; 65\% of the X-ray AGN candidates are spectroscopically-identified. For the remaining X-ray AGN candidates, we evaluate their photometric redshift with photometric data in 15 bands. Utilising the multi-wavelength photometric data of the large sample of X-ray selected AGNs, we evaluate the stellar masses, M*, of the host galaxies of the narrow-line AGNs. The distribution of the stellar mass is remarkably constant from z=0.1 to 4.0. The relation between M* and 2--10 keV luminosity can be explained with strong cosmological evolution of the relationship between the black hole mass and M*. We also evaluate the scatter of the UV-MIR spectral energy distribution (SED) of the X-ray AGNs as a function of X-ray luminosity and absorption to the nucleus. The scatter is compared with galaxies which have redshift and stellar mass distribution matched with the X-ray AGN. The UV-NIR SEDs of obscured X-ray AGNs are similar to those of the galaxies in the matched sample. In the NIR-MIR range, the median SEDs of X-ray AGNs are redder, but the scatter of the SEDs of the X-ray AGN broadly overlaps that of the galaxies in the matched sample.

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