Study of Central Intensity Ratio of Seyfert Galaxies in Nearby Universe  

作　　者：K.T.Vinod C.Baheeja S.Aswathy C.D.Ravikumar 

机构地区：[1]Department of Physics,University of Calicut,Malappuram-673635,India [2]Department of Physics,Providence Women's College,Calicut-673009,India

出　　处：《Research in Astronomy and Astrophysics》2023年第4期85-93,共9页天文和天体物理学研究（英文版）

基　　金：the financial support from the Council of Scientific&Industrial Research (CSIR),Government of India。

摘　　要：We use the recently discovered simple photometric parameter Central Intensity Ratio(CIR)determined for a sample of 57 nearby(z<0.02)Seyfert galaxies to explore the central features of galaxies and their possible connection with galaxy evolution.The sample of galaxies shows strong anti-correlation between CIR and mass of their central supermassive black holes(SMBHs).The SMBH masses of ellipticals are systematically higher for a given CIR value than those for lenticulars and spirals in the sample.However,the correlation between CIR and central velocity dispersion is weak.CIR appears less influenced by the excess flux produced by the central engine in these galaxies,when compared to spectroscopic parameters like velocity dispersion and OⅣflux,and proves to be a fast and reliable tool for estimating central SMBH mass.

关 键 词：Galaxy evolution-galaxies active-galaxies photometry-(galaxies:)quasars supermassive black holes-galaxies SEYFERT 

分 类 号：P15[天文地球—天文学]