On the BL Lacertae objects/radio quasars and the FRI/II dichotomy

Details On the BL Lacertae objects/radio quasars and the FRI/II dichotomy On the BL Lacertae objects/radio quasars and the FRI/II dichotomy

2009-02-14

arxiv.org/abs/0902.2426v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

4 pages, 2 figures, accepted by ApJL

Scientific paper

10.1088/0004-637X/694/2/L107

In the frame of unification schemes for radio-loud active galactic nuclei (AGNs), FR I radio galaxies are believed to be BL Lacertae (BL Lac) objects with the relativistic jet misaligned to our line of sight, and FR II radio galaxies correspond to misaligned radio quasars. The Ledlow-Owen dividing line for FR I/FR II dichotomy in the optical absolute magnitude of host galaxy-radio luminosity (M_R-L_Rad) plane can be translated to the line in the black hole mass-jet power (M_bh-Q_jet) plane by using two empirical relations: Q_jet-L_Rad and M_bh}-M_R. We use a sample of radio quasars and BL Lac objects with measured black hole masses to explore the relation of the jet power with black hole mass, in which the jet power is estimated from the extended radio emission. It is found that the BL Lac objects are clearly separated from radio quasars by the Ledlow & Owen FR I/II dividing line in the M_bh-Q_jet plane. This strongly supports the unification schemes for FR I/BL Lac object and FR II/radio quasar. We find that the Eddington ratios L_bol/L_Edd of BL Lac objects are systematically lower than those of radio quasars in the sample with a rough division at L_bol/L_Edd 0.01, and the distribution of Eddington ratios of BL Lac objects/quasars exhibits a bimodal nature, which imply that the accretion mode of BL Lac objects may be different from that of radio quasars.

Affiliated with

Also associated with

No associations

Rating

On the BL Lacertae objects/radio quasars and the FRI/II dichotomy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the BL Lacertae objects/radio quasars and the FRI/II dichotomy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the BL Lacertae objects/radio quasars and the FRI/II dichotomy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-55077