Other
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1201...92m&link_type=abstract
THE MONSTER'S FIERY BREATH: FEEDBACK IN GALAXIES, GROUPS, AND CLUSTERS. AIP Conference Proceedings, Volume 1201, pp. 92-95 (200
Other
Clusters Of Galaxies, Galactic Nuclei, Accretion Disks, X-Rays, Interstellar Magnetic Fields, Small And Compact Galaxy Groups, Galactic Nuclei, Circumnuclear Matter, And Bulges, Infall, Accretion, And Accretion Disks, X-Ray, Electric And Magnetic Fields
Scientific paper
We investigate the possibility that AGN in brightest cluster galaxies (BCGs) are powered by angular momentum released by spinning, supermassive black holes (SMBH). Spin is poorly constrained by observed jet power alone because most spin models require a finite accretion rate to tap the black hole's angular momentum, and because BCGs usually have adequate fuel supplies to power AGN by accretion. Nevertheless, assuming all systems are accreting at a constant fraction of the Eddington accretion rate, their jet powers estimated from X-ray cavities are consistent with a broad distribution of spin parameter. Using the highest power AGN i.e., with Pjet>1046 erg s-1 such as MS0735 and Hercules A, we constrain the (model dependent) critical transitional accretion rate between radiatively inefficient accretion flows (ADAFs) and quasars to be ṁcrit~=0.02, which is consistent with other estimates. The high accretion rate required to power the AGN outburst in MS0735 relative to its meager gas supply, and the need for spin parameters uncomfortably close to unity suggest an efficiency of spin powering Pjet>Ṁc2, which is difficult to achieve with current models.
McNamara Brian R.
Nulsen Paul E. J.
Rohanizadegan Mina
No associations
LandOfFree
Black Hole Spin Powered Feedback 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 Black Hole Spin Powered Feedback, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Black Hole Spin Powered Feedback will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1882247