Influence of Comptonization region over the ambiance of accretion disc in active galactic nucleus

Journal Article · Wed Dec 15 00:00:00 EST 2021 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/stab3610· OSTI ID:1839449

Sriram, K.; Nour, D.; Choi, C. S.

Understanding the radiative and physical structures of inner region of a few 100 pc of active galactic nucleus (AGNs) is important to constrain the causes of their activities. Although the X-ray emission from the Comptonization region/corona and the accretion disc regulates the broad-line emission regions and torus structures, the exact mutual dependency is not understood well. We performed correlation studies for X-ray, mid-infrared, and different components of Balmer emission lines for the selected sample of AGNs. Almost 10 different parameters and their interdependencies were explored in order to understand the underlying astrophysics. We found that the X-ray luminosity has a linear dependency on the various components of broad Balmer emission lines (e.g. L$$_{\text{2-10 keV}}\, \propto$$ L$$^{0.78}_{\text{H}\beta ^{\text{B}}}$$) and found a strong dependency on the optical continuum luminosity (L$$_{\text{2-10 keV}}\, \propto$$ L$$^{0.86}_{5100\, \mathring{\rm A}}$$). For a selected sample, we also observed a linear dependency between X-ray and mid-infrared luminosity (L$$_{\text{2-10 keV}}\, \propto$$ L$$^{0.74}_{6\, \mu \text{m}}$$). A break point was observed in our correlation studies for X-ray power-law index, Γ, and mass of black hole at ~ log (M/M_⊙)  = 8.95. Similarly, the relations between Γ and full width at half-maximum (FWHM) of H α and H β broad components show breaks at FWHM_{H α} = 7642 ± 657 km s^-1 and FWHM_{H β} = 7336 ± 650 km s^-1. However, more data are required to confine the breaks locations exactly. We noted that Γ and Eddington ratios are negatively correlated to Balmer decrements in our selected sample. We analysed and discussed about the implications of new findings in terms of interaction AGN structures.

• Research Organization: US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Sloan Digital Sky Survey (SDSS)
• Sponsoring Organization: USDOE Office of Science (SC)
• OSTI ID: 1839449
• Alternate ID(s): OSTI ID: 1982569
• Journal Information: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Vol. 510 Journal Issue: 3; ISSN 0035-8711
• Publisher: Oxford University Press
• Country of Publication: United Kingdom
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
astronomy
astrophysics
accretion
accretion discs
galaxies
active