Feii emission in NLS1s – originating from denser regions with higher abundances?. Issue Volume 15:Issue S356(2019) (October 2019)

• Record Type: Journal Article
• Authors: Panda, Swayamtrupta; Marziani, Paola; Czerny, Bożena
• Editors: Pović, Mirjana; Marziani, Paola; Masegosa, Josefa; Netzer, Hagai; Negu, Seblu H.; Tessema, Solomon B.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S356(2019)
• Page Start: 77
• Page End: 81
• Publication Date: 2019-10
• Subjects: accretion, -- accretion disks, -- radiation mechanisms: thermal, -- radiative transfer, -- galaxies: active, -- (galaxies:) quasars: emission lines, -- galaxies: Seyfert; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921320002616
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: The interpretation of the main sequence of quasars has become a frontier subject in the last years. This considers the effect of a highly flattened, axially symmetric geometry for the broad line region (BLR) on the parameters related to the distribution of quasars along their main sequence. We utilize the photoionization code CLOUDY to model the BLR, assuming 'un-constant' virial factor with a strong dependence on the viewing angle. We show the preliminary results of the analysis to highlight the co-dependence of the Eigenvector 1 parameter, RFeii on the broad H β FWHM (i.e. the line dispersion) and the inclination angle ( θ ), assuming fixed values for the Eddington ratio ( L bo1 / L Edd ), black hole mass ( M BH ) and spectral energy distribution (SED) shape. We consider four cases with changing cloud density (nH ) and composition. Understanding the emitting region is crucial as this knowledge can be extended to the use of quasars as distance indicators for Cosmology.‡