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Radio Properties of Cavities in the ICM: Imprints of AGN Activity
L. Birzan, B. R. McNamara, C. L. Carilli +2
We present new, high resolution radio images of sources associated with cD galaxies and X-ray cavity systems located in cluster cores. The cavity properties derived from archival C…
The Growth of Black Holes and Bulges at the Cores of Cooling Flows
D. A. Rafferty, B. R. McNamara, P. E. J. Nulsen +1
Central cluster galaxies (cDs) in cooling flows are growing rapidly through gas accretion and star formation. At the same time, AGN outbursts fueled by accretion onto supermassive…
X-ray Supercavities in the Hydra A Cluster and the Outburst History of the Central Galaxy's Active Nucleus
M. W. Wise, B. R. McNamara, P. E. J. Nulsen +2
A 227 ksec Chandra Observatory X-ray image of the hot plasma in the Hydra A cluster has revealed an extensive cavity system. The system was created by a continuous outflow or a ser…
XMM-Newton view of MS0735+7421: the most energetic AGN outburst in a galaxy cluster
Myriam Gitti, Brian R. McNamara, Paul E. J. Nulsen +1
We discuss the possible cosmological effects of powerful AGN outbursts in galaxy clusters by starting from the results of an XMM-Newton observation of the supercavity cluster MS073…
AGN Heating through Cavities and Shocks
P. E. J. Nulsen, C. Jones, W. R. Forman +5
Three comments are made on AGN heating of cooling flows. A simple physical argument is used to show that the enthalpy of a buoyant radio lobe is converted to heat in its wake. Thus…
The Hot Gas Content of Low-Luminosity Early-Type Galaxies and the Implications Regarding Supernova Heating and AGN Feedback
Laurence P. David, Christine Jones, William Forman +2
We have analyzed Chandra observations of 18 low-luminosity early-type galaxies with L_B < 3 x 10e10 Lo. Thermal emission from hot gas with temperatures between 0.2 and 0.8 keV comp…
Chandra Observations of Nuclear Outflows in the Elliptical Galaxy NGC4552 in the Virgo Cluster
M. Machacek, P. E. J. Nulsen, C. Jones +1
We use a 54.4 ks Chandra observation to study nuclear outflow activity in NGC4552 (M89), an elliptical galaxy in the Virgo Cluster. Chandra images in the 0.5-2 keV band show two ri…
Filaments, Bubbles, and Weak Shocks in the Gaseous Atmosphere of M87
W. Forman, E. Churazov, C. Jones +10
We present the first results from a 500 ksec Chandra ACIS-I observation of M87. At soft energies (0.5-1.0 keV), we detect filamentary structures associated with the eastern and sou…
The Starburst in the Abell 1835 Cluster Central Galaxy: A Case Study of Galaxy Formation Regulated by an Outburst from a Supermassive Black Hole
B. R. McNamara, D. A. Rafferty, L. Birzan +6
We present an optical, X-ray, and radio analysis of the starburst in the Abell 1835 cluster's central cD galaxy. The dense gas surrounding the galaxy is radiating X-rays with a lum…
The complex X-ray morphology of NGC 7618: A major group-group merger in the local Universe?
R. P. Kraft, C. Jones, P. E. J. Nulsen +1
We present results from a short {\em Chandra}/ACIS-S observation of NGC 7618, the dominant central galaxy of a nearby (=0.017309, d=74.1 Mpc) group. We detect a sharp surface br…