POWERFUL RADIO EMISSION FROM LOW-MASS SUPERMASSIVE BLACK HOLES FAVORS DISK-LIKE BULGES

被引：3

作者：

Wang, J. ^{[1
,2
]}

Xu, Y. ^{[1
,2
]}

Xu, D. W. ^{[1
,2
]}

Wei, J. Y. ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, CAS Key Lab Space Astron & Technol, Natl Astron Observ, Beijing, Peoples R China

[2] Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing, Peoples R China

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2016年 / 833卷 / 01期

基金：

中国国家自然科学基金;

关键词：

galaxies: bulges; galaxies: nuclei; galaxies: Seyfert; LINE SEYFERT-1 GALAXIES; ACTIVE GALACTIC NUCLEI; STAR-FORMATION; HOST GALAXIES; ELECTROMAGNETIC EXTRACTION; ACCRETION DISKS; O-II; EVOLUTION; CLASSIFICATION; COEVOLUTION;

D O I：

10.3847/2041-8205/833/1/L2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The origin of spin of low-mass supermassive black holes (SMBHs) is still a puzzle at present. We report here a study on the host galaxies of a sample of radio-selected nearby (z < 0.05) Seyfert 2 galaxies with a BH mass of 106-7. M-circle dot. By modeling the SDSS r-band images of these galaxies through a two-dimensional bulge+disk decomposition, we identify a new dependence of SMBH's radio power on host bulge surface brightness profiles, in which more powerful radio emission comes from an SMBH associated with a more disk-like bulge. This result means low-mass and high-mass SMBHs are spun up by two entirely different modes that correspond to two different evolutionary paths. A low-mass SMBH is spun up by a gas accretion with significant disk-like rotational dynamics of the host galaxy in the secular evolution, while a high-mass one by a BH-BH merger in the merger evolution.

引用

页数：6

共 50 条

[1]

[Anonymous], 2016, ASTROPHYS J

[2]

Bagchi J., 2014, APJ, V788, P18

[3] Radio-loud Narrow Line Seyfert 1 under a different perspective: a revised black hole mass estimate from optical spectropolarimetry [J].