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.