The M_bh-sigma diagram, and the offset nature of barred active galaxies

Details The M_bh-sigma diagram, and the offset nature of barred active galaxies The M_bh-sigma diagram, and the offset nature of barred active galaxies

2009-04-08

arxiv.org/abs/0904.1290v2

Astrophys.J.698:812-818,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Short paper: 4 pages of text plus 4 figures and 1 table. Accepted by ApJ

Scientific paper

10.1088/0004-637X/698/1/812

From a sample of 50 predominantly inactive galaxies with direct supermassive black hole mass measurements, it has recently been established that barred galaxies tend to reside rightward of the M_bh-sigma relation defined by non-barred galaxies. Either black holes in barred galaxies tend to be anaemic or the central velocity dispersions in these galaxies have a tendency to be elevated by the presence of the bar. The latter option is in accord with studies connecting larger velocity dispersions in galaxies with old bars, while the former scenario is at odds with the observation that barred galaxies do not deviate from the M_bh-luminosity relation. Using a sample of 88 galaxies with active galactic nuclei, whose supermassive black hole masses have been estimated from their associated emission lines, we reveal for the first time that they also display this same general behavior in the M_bh-sigma diagram depending on the presence of a bar or not. A new symmetrical and non-symmetrical "barless" M_bh-sigma relation is derived using 82 non-barred galaxies. The barred galaxies are shown to reside on or up to ~1 dex below this relation. This may explain why narrow-line Seyfert 1 galaxies appear offset from the "barless" M_bh-sigma relation, and has far reaching implications given that over half of the disk galaxy population are barred.

Affiliated with

Also associated with

No associations

Rating

The M_bh-sigma diagram, and the offset nature of barred active galaxies 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 The M_bh-sigma diagram, and the offset nature of barred active galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The M_bh-sigma diagram, and the offset nature of barred active galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-214318