BAT AGN Spectroscopic Survey XXVII: scattered X-Ray radiation in obscured active galactic nuclei

摘要: Accreting supermassive black holes (SMBHs), also known as active galactic nuclei (AGN), are generally surrounded by large amounts of gas and dust. This surrounding material reprocesses the primary X-ray emission produced close to SMBH gives rise several components in broadband spectra AGN, including a power-law possibly associated with Thomson-scattered radiation. In this work, we study properties scattered component for sample 386 hard-X-ray-selected, nearby ($z \sim 0.03$) obscured AGN from 70-month Swift/BAT catalog. We investigate how fraction radiation correlates different physical such line-of-sight column density, luminosity, hole mass, Eddington ratio. find significant negative correlation between scattering density. Based on number spectral simulations, exclude possibility that anti-correlation is due degeneracies parameters. The persists when considering ranges discuss might be either angle dependence Thomson cross-section or more sources having higher covering factor torus. positive ratio [OIII] $\lambda$5007 luminosity. result consistent previous studies suggests narrow-line region.