How Does the Polar Dust Affect the Correlation between Dust Covering Factor and Eddington Ratio in Type 1 Quasars Selected from the Sloan Digital Sky Survey Data Release 16?
How Does the Polar Dust Affect the Correlation between Dust Covering Factor and Eddington Ratio in Type 1 Quasars Selected from the Sloan Digital Sky Survey Data Release 16?
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DOI：
10.3847/1538-4357/abe94a
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发表时间：
2021-02
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影响因子：
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通讯作者：
Y. Toba;Y. Ueda;P. Gandhi;C. Ricci;D. Burgarella;V. Buat;T. Nagao;S. Oyabu;H. Matsuhara
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文献类型：
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作者：
Y. Toba;Y. Ueda;P. Gandhi;C. Ricci;D. Burgarella;V. Buat;T. Nagao;S. Oyabu;H. Matsuhara
通过考虑活动星系核（AGN）的极尘辐射，我们重新讨论了尘埃环的覆盖因子（CF）对活动星系核（AGN）物理性质的依赖性。CF是由活动星系核尘埃环贡献的红外光度与活动星系核辐射热光度之比（L bol）换算而成，并假定光度比与内禀CF之间存在非线性关系。我们从Sloan Digital Sky Survey Data Release 16类星体目录中选择了37，181个z < 0.7的1型类星体。用QSFit谱拟合得到了它们的Lbol、黑洞质量（MBH）和爱丁顿比（λ Edd）。我们进行光谱能量分布分解，使用X-CIGALE与cluertorus和极地尘埃模型估计，而不受恒星和活动星系核极地尘埃对红外辐射的贡献。对于5752个物理量已确定的类星体，我们对CF和（i）L bol，（ii）M BH，（iii）λ Edd进行了相关分析。结果证实了CF-L bol、CF-M BH和CF-λ Edd的关系。我们发现，考虑活动星系核极尘辐射的影响后，这种关联性比不考虑它时更强，这表明活动星系核辐射压驱动的极尘风可能是调节活动星系核遮蔽物质的关键成分之一。
We revisit the dependence of the covering factor (CF) of dust torus on physical properties of active galactic nuclei (AGNs) by taking into account an AGN polar dust emission. The CF is converted from a ratio of infrared (IR) luminosity contributed from AGN dust torus ( ) and AGN bolometric luminosity (L bol), by assuming a nonlinear relation between luminosity ratio and intrinsic CF. We select 37,181 type 1 quasars at z < 0.7 from the Sloan Digital Sky Survey Data Release 16 quasar catalog. Their L bol, black hole mass (M BH), and Eddington ratio (λ Edd) are derived by spectral fitting with QSFit. We conduct spectral energy distribution decomposition by using X-CIGALE with a clumpy torus and polar dust model to estimate without being affected by the contribution of stellar and AGN polar dust to IR emission. For 5752 quasars whose physical quantities are securely determined, we perform a correlation analysis on CF and (i) L bol, (ii) M BH, and (iii) λ Edd. As a result, anticorrelations for CF–L bol, CF–M BH, and CF–λ Edd are confirmed. We find that incorporating the AGN polar dust emission makes those anticorrelations stronger compared to those without considering it. This indicates that polar dust wind probably driven by AGN radiative pressure is one of the key components to regulate obscuring material of AGNs.