NuSTAR Discovery of a Compton-thick, Dust-obscured Galaxy: WISE J0825+3002
NuSTAR Discovery of a Compton-thick, Dust-obscured Galaxy: WISE J0825+3002
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DOI：
10.3847/1538-4357/ab5718
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
Y. Toba;S. Yamada;Y. Ueda;C. Ricci;Y. Terashima;T. Nagao;Wei-hao Wang;A. Tanimoto;T. Kawamuro
中科院分区：
文献类型：
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作者：
Y. Toba;S. Yamada;Y. Ueda;C. Ricci;Y. Terashima;T. Nagao;Wei-hao Wang;A. Tanimoto;T. Kawamuro
我们报告在 z = 0.89 处发现了康普顿厚 (CT) 的尘埃遮蔽星系，WISE J082501.48+300257.2 (WISE 0825+3002)，由核光谱望远镜阵列观测到。 XCLUMPY模型的X射线分析显示，WISE 0825+3002静止帧2~10 keV波段的硬X射线光度为LX（2~10 keV）= erg s−1，氢柱密度为NH = cm−2，表明WISE 0825+3002是一个轻度CT活跃的星系核（AGN）。我们用 CIGALE 进行光谱能量分布 (SED) 拟合，得出其恒星质量、恒星形成率和红外光度。基于恒星质量和 AGN 组件的最佳拟合 SED 积分估计的爱丁顿比为 λEdd = 0.70，这表明 WISE 0825+3002 在大量气体和尘埃后面隐藏着一个活跃生长的黑洞。我们发现X射线和6μm的光度比与Eddington比之间的关系遵循Toba等人报道的活动星系核的经验关系。
We report the discovery of a Compton-thick (CT), dust-obscured galaxy at z = 0.89, WISE J082501.48+300257.2 (WISE 0825+3002), observed by the Nuclear Spectroscopic Telescope Array. X-ray analysis with the XCLUMPY model revealed that hard X-ray luminosity in the rest-frame 2–10 keV band of WISE 0825+3002 is LX (2–10 keV) = erg s−1 while its hydrogen column density is NH = cm−2, indicating that WISE 0825+3002 is a mildly CT active galactic nucleus (AGN). We performed spectral energy distribution (SED) fitting with CIGALE to derive its stellar mass, star formation rate, and infrared luminosity. The estimated Eddington ratio based on stellar mass and integration of the best-fit SED of the AGN component is λEdd = 0.70, which suggests that WISE 0825+3002 harbors an actively growing black hole behind a large amount of gas and dust. We found that the relationship between the luminosity ratio of X-ray and 6 μm, and Eddington ratio, follows an empirical relation for AGNs reported by Toba et al.