Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-08-11
Astronomy and Astrophysics
Astrophysics
5 pages, 2 figures, accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2004.08305.x
Using a sample of more than 6000 quasars from the Sloan digital sky survey (SDSS) we compare the black-hole mass distributions of radio-loud and radio-quiet quasars. Based on the virial black-hole mass estimator the radio-loud quasars (RLQs) are found to harbour systematically more massive black holes than radio-quiet quasars (RQQs) with very high significance (>>99.99%), with mean black-hole masses of <\log(M_{bh}/\Msun)>=8.89\pm0.02 and <\log(M_{bh}/\Msun)>=8.69\pm0.01 for the RLQs and RQQs respectively. Crucially, the new RLQ and RQQ samples have indistinguishable distributions on the redshift-optical luminosity plane, excluding the possibility that either parameter is responsible for the observed black-hole mass difference. Moreover, this black-hole mass difference is shown to be in good agreement with the optical luminosity difference observed between RLQ and RQQ host galaxies at low redshift (i.e. \Delta M_{host}=0.4-0.5 magnitudes). Within the SDSS samples, black-hole mass is strongly correlated with both radio luminosity and the radio-loudness $\mathcal{R}$ parameter (>7 sigma significance), although the range in radio luminosity at a given black-hole mass is several orders of magnitude. It is therefore clear that the influence of additional physical parameters or evolution must also be invoked to explain the quasar radio-loudness dichotomy.
Jarvis Martin J.
McLure Ross J.
No associations
LandOfFree
The relationship between radio luminosity and black-hole mass in optically-selected quasars 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 relationship between radio luminosity and black-hole mass in optically-selected quasars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The relationship between radio luminosity and black-hole mass in optically-selected quasars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-207878