Abstract Details

Name: Nour Dergham
Affiliation: Osmania University
Conference ID: ASI2021_128
Title : Correlation studies of Broad and Narrow line vs the X-ray producing regions in a sample of unobscured AGNs
Authors and Co-Authors : Nour Dergham(Osmania University) , Sriram, K(Osmania University)
Abstract Type : Poster
Abstract Category : Extragalactic Astronomy
Abstract : We modelled continuum and emission lines for a sample of unobscured Type I Active Galactic Nuclei (AGNs) using SDSS data (DR12). After removing the effects caused by galactic extinction, redshift and the contribution of host galaxy, we calculated various parameters of Hɑ, Hβ and OIII emission lines. We used two component model to get the properties of Hɑ and Hβ and calculated the luminosity and EW of these lines. Correlation studies were carried between the optical and X-ray luminosity (2-10 keV) as well with power-law index for few of the AGNs. We found that the broad components of emission lines show the best correlation with hard X-ray luminosity when compared with narrow component and this agree with the picture that broad line region (BLR) has the closest link with the AGN’s compact X-ray emission. [OIII] emission line show relatively strong correlation with X-ray luminosity. We found that only Hβ broad component is exhibiting a negative correlation with X-ray power-law index, whereas other components of other spectral lines does not show any correlations. We briefly discuss these results which clarifies the picture of association of inner region of accretion disk and regions producing the spectral lines.