The black hole mass of BL Lacertae objects from the stellar velocity dispersion of the host galaxy

被引:61
作者
Falomo, R
Kotilainen, JK
Treves, A
机构
[1] Astron Observ Padova, I-35122 Padua, Italy
[2] Univ Turku, Tuorla Observ, FIN-21500 Piikkio, Finland
[3] Univ Insubria, I-22100 Como, Italy
基金
美国国家科学基金会;
关键词
BL Lacertae objects : general galaxies : active; galaxies : elliptical and lenticular cD; galaxies : kinematics and dynamics galaxies : nuclei;
D O I
10.1086/340642
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The correlation between black hole mass M-BH and stellar velocity dispersion sigma in nearby elliptical galaxies MBH affords us a novel way to determine M-BH in active galaxies. We report on measurements of sigma from optical spectra MBH of seven BL Lacertae host galaxies. The derived values of sigma are in the range of 160-290 km s(-1) corresponding to M-BH of 5 x 10(7)-1 x 10(9) M-.. The average ratio of M-BH to the host galaxy mass is 1.4 x 10(-3), consistent with that estimated in other active and inactive galaxies. The velocity dispersions and the derived values of M-BH of the BL Lac objects are similar to those obtained for low-redshift radio galaxies, in good agreement with MBH the predictions of the unified models for radio-loud active galaxies.
引用
收藏
页码:L35 / L38
页数:4
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