Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.0103m&link_type=abstract
American Astronomical Society, HEAD meeting #8, #01.03; Bulletin of the American Astronomical Society, Vol. 36, p.902
Astronomy and Astrophysics
Astronomy
Scientific paper
It is becoming increasingly evident that the hot gas in galaxy clusters is heated and redistributed on large scales by powerful radio sources. Discoveries by the Chandra X-ray Observatory of nearly two dozen cavity systems show that radio sources deposit between 1057}-10{60 erg into the keV gas during a typical radio outburst. We show that feedback at this level is sufficient to balance cooling in many systems, and that it plays a significant role in magnetizing and preheating clusters.
We report a spectacular new Chandra observation of a redshift z=0.2 cluster harboring twin, radio-filled cavities, each of which is nearly 250 kpc in diameter. These enormous cavities are surrounded by prominent shocks. By far the largest and most powerful cavity system known, it has deposited more than 4x1061 erg into the intracluster medium over the past 100 Myr, equivalent to a powerful quasar. Unlike a quasar, however, its modest radio power yet remarkably large kinetic power shows that even modest radio sources in clusters can be dynamically significant.
Birzan Laura
McNamara Brian R.
Nulsen Paul E. J.
Rafferty David
Wise Michael Wayne
No associations
LandOfFree
Bubbles and Supercavities in Clusters of 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 Bubbles and Supercavities in Clusters of Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bubbles and Supercavities in Clusters of Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1174779