期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 482, 期 4, 页码 4985-4999出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty2995
关键词
line: profiles; polarization; galaxies: active; galaxies: nuclei; quasars:emission lines; quasars: supermassive black holes
资金
- Ministry of Education and Science of Russian Federation [16.552.11.7028, 16.518.11.7073]
- Russian Foundation for Basic Research [N15-02-02101]
- Ministry of Education, Science and Technological Development (Republic of Serbia) through the project Astrophysical Spectroscopy of Extragalactic Objects [176001]
Here we present the spectropolarimetric observations of a sample of 30 Type 1 active galactic nuclei (AGNs) and an analysis of the observed polarization in these AGNs. The observations have been performed with the 6m telescope of SAO RAS using the modified SCORPIO-2 spectropolarimeter. We measured the Stokes parameters for the continuum and the broad Ha line and obtained the values of polarization degree and the angle of polarization. We found that equatorial scattering is dominant polarization mechanism in the sample that allows us to use the observed polarization in the broad lines for determination of the central black hole (BH) masses and characteristics (the inclination and emissivity) of the broad-line region (BLR). We demonstrated that the recently proposed method of Afanasiev & Popovic (2015) for BH mass measurement gives accurate BH masses that are in a good correlation with the stellar velocity dispersion, and consequently, the masses determined by the polarization method can be used with calibration purposes. Additionally we found that the BLR in the sample of 30 AGNs has an averaged inclination of 35 degrees +/- 9 (mostly between 20 degrees and 40 degrees) and emissivity alpha similar to -0.57 that is more flat than one expected for the classical accretion disc alpha similar to -0.75.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据