10 citations · 56 across the 23 of their papers we have counts for
19 papers · 1 filter
Cluster Galaxy Morphologies: The Relationship among Structural Parameters, Activity and the Environment
Christopher Añorve, Omar López-Cruz, Hector Ibarra-Medel +1
We use an approach to estimate galaxy morphologies based on an ellipticity (e) vs. Bulge-to-Total ratio (B/T) plane. We have calibrated this plane by comparing with Dressler's clas…
X-ray Point Sources and Radio Galaxies in Clusters: Source of Distributed Heating of the ICM?
Quyen N. Hart, John T. Stocke, Eric J. Hallman
In our ongoing multi-wavelength study of cluster AGN, we find ~75% of the spectroscopically identified cluster X-ray point sources (XPS) with L(0.3-8.0keV)>10^{42} erg s^{-1} and c…
Calibrating AGN Feedback in Clusters
M. W. Wise
Whether caused by AGN jets, shocks, or mergers, the most definitive evidence for heating in cluster cores comes from X-ray spectroscopy. Unfortunately such spectra are essentially…
AGN Feedback: Does it work?
Smita Mathur, Rebecca Stoll, Yair Krongold +3
While feedback is important in theoretical models, we do not really know if it works in reality. Feedback from jets appears to be sufficient to keep the cooling flows in clusters f…
AGN outflow feedback: Constraints from variability
R. G. Detmers, J. S. Kaastra
We present an overview on how variability can be used to constrain the location of the ionized outflow in nearby Active Galactic Nuclei using high-resolution X-ray spectroscopy. Wi…
The Evolution of AGN in Groups and Clusters
Paul Martini
The evolution of AGN in groups and clusters provides important information about how their black holes grow, the extent to which galaxies and black holes coevolve in dense environm…
Cosmic Ray Feedback
William G. Mathews
Cosmic rays produced or deposited at sites in hot cluster gas are thought to provide the pressure that forms X-ray cavities. While cavities have a net cooling effect on cluster gas…
Why are there strong radio AGNs in the center of "non-cool core" clusters?
Ming Sun
Radio AGN feedback in X-ray cool cores has been proposed as a crucial ingredient in the evolution of baryonic structures. However, it has long been known that strong radio AGNs als…
AGN Feedback in the Compact Group of Galaxies HCG 62 - as revealed by Chandra, XMM and GMRT data
M. Gitti, E. O'Sullivan, S. Giacintucci +4
As a part of an ongoing study of a sample of galaxy groups showing evidence for AGN/hot gas interaction, we report on the preliminary results of an analysis of new XMM and GMRT dat…
Heating and Cooling in Clusters and Groups
A. C. Fabian, J. S. Sanders
The gas in the cores of many clusters and groups of galaxies has a short radiative cooling time. Energy from the central black hole is observed to flow into this gas by means of je…
The Monster's Fiery Breath and its Impact on Galaxy Formation
R. G. Bower
My aim in this talk is to make clear that there are two sides to galaxy formation: the properties of the galaxies themselves, and the properties of the material that is left over f…
3D Numerical Simulations of AGN Outflows in Clusters and Groups
M. Gaspari, C. Melioli, F. Brighenti +1
We compute 3D gasdynamical models of jet outflows from the central AGN, that carry mass as well as energy to the hot gas in galaxy clusters and groups. These flows have many attrac…
The Detectability of AGN Cavities in Cooling-Flow Clusters
L. Birzan, D. A. Rafferty, B. R. McNamara +2
Chandra X-ray Observatory has revealed X-ray cavities in many nearby cooling flow clusters. The cavities trace feedback from the central active galactic nulceus (AGN) on the intrac…
Cluster Core Heating from Merging Subclusters
J. A. ZuHone, M. Markevitch
Though feedback from central active galactic nuclei provides an attractive solution to the problem of overcooling in galaxy cluster cores, another possible source of heating may co…
Searching for a Gravitational Heating Signature in Nearby Luminous Ellipticals
Tomer Tal, Pieter G. van Dokkum, Jeffrey D. P. Kenney
We present a new deep optical study of a luminosity limited sample of nearby elliptical galaxies, attempting to observe the effects of gravitational interactions on the ISM of thes…
AGN feedback in galaxy groups: a joint GMRT/X-ray study
S. Giacintucci, J. M. Vrtilek, E. O'Sullivan +5
We present an ongoing study of 18 nearby galaxy groups, chosen for the availability of Chandra and/or XMM-Newton data and evidence for AGN/hot intragroup gas interaction. We have o…
Fossil Galaxy Groups -- Ideal Laboratories for Studying the Effects of AGN Heating
Nazirah N. Jetha, Habib Khosroshahi, Somak Raychaudhury +2
We present the first of a sample of fossil galaxy groups with pre-existing Chandra and/or XMM-Newton X-ray observations and new or forthcoming low frequency GMRT data -- RXJ1416.4+…
The Moderate Cooling Flow Model and Feedback in Galaxy Formation
Noam Soker, Assaf Sternberg, Fabio Pizzolato
For the recent four years we have been studying feedback heating in cooling flow (CF) clusters by AGN activity that inflate bubbles by jets; this short contribution to a meeting su…
Prospects for Probing Feedback from the First Black Holes and Stars During Reionization
Jack O. Burns
The feasibility of making highly redshifted HI 21-cm (rest frame) measurements from an early epoch of the Universe between the Dark Ages and Reionization (i.e., z>6 and nu<200 MHz)…