Narrow-line Seyfert Galaxies. Connection between abundance and the large-scale structure

16th Russian Youth Conference on Physics and Astronomy

物理学;天文学

Ermash, A.A.^1 ; Komberg, B.V.^1

Astro Space Centre, P.N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia^1

关键词: Large scale structures;    Narrow lines;    Seyfert galaxies;    Spatial concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/572/1/012002/pdf
DOI  :  10.1088/1742-6596/572/1/012002

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Utilizing methods, developed by the author the correlations between spatial concentrations of active nuclei (NLS and BLS) and concentration of galaxies of full uniform sample were obtained. Galaxies of this uniform sample trace the large-scale structure. We used SDSS DR 7 data. The correlations obtained are linear and the NLS/BLS ratio is constant. That leads to conclusion that amounts NLS and BLS are some fixed portion of all galaxies independent on the density of large-scale environment. In order to check validity of our results we also confirmed the well known result that fraction of red galaxies increases with density of environment. Also it was confirmed that this trend is more prominent for less massive galaxies.