scholarly journals AGN Feedback in Galaxy Groups: A Joint GMRT∕X-ray Study

2009 ◽  
Author(s):  
S. Giacintucci ◽  
J. M. Vrtilek ◽  
E. O’Sullivan ◽  
S. Raychaudhury ◽  
L. P. David ◽  
...  
Keyword(s):  
X Ray ◽  
Galaxy Groups

Supermassive Black Hole feedback in early type galaxies

2020 ◽  
Vol 15 (S359) ◽  
pp. 119-125
Author(s):  
W. Forman ◽  
C. Jones ◽  
A. Bogdan ◽  
R. Kraft ◽  
E. Churazov ◽  
...  
Keyword(s):  
Dark Matter Halo ◽  
Scaling Relations ◽  
Radio Sources ◽  
Early Type ◽  
X Ray ◽  
Galaxy Groups ◽  
Sufficient Energy ◽  
The Galaxy ◽  
Simple Scaling ◽  
Halo Masses

AbstractOptically luminous early type galaxies host X-ray luminous, hot atmospheres. These hot atmospheres, which we refer to as coronae, undergo the same cooling and feedback processes as are commonly found in their more massive cousins, the gas rich atmospheres of galaxy groups and galaxy clusters. In particular, the hot coronae around galaxies radiatively cool and show cavities in X-ray images that are filled with relativistic plasma originating from jets powered by supermassive black holes (SMBH) at the galaxy centers. We discuss the SMBH feedback using an X-ray survey of early type galaxies carried out using Chandra X-ray Observatory observations. Early type galaxies with coronae very commonly have weak X-ray active nuclei and have associated radio sources. Based on the enthalpy of observed cavities in the coronae, there is sufficient energy to “balance” the observed radiative cooling. There are a very few remarkable examples of optically faint galaxies that are 1) unusually X-ray luminous, 2) have large dark matter halo masses, and 3) have large SMBHs (e.g., NGC4342 and NGC4291). These properties suggest that, in some galaxies, star formation may have been truncated at early times, breaking the simple scaling relations.

scholarly journals Physical implications of the X-ray properties of galaxy groups and clusters

2002 ◽  
Vol 330 (2) ◽  
pp. 329-343 ◽  
Author(s):  
Arif Babul ◽  
Michael L. Balogh ◽  
Geraint F. Lewis ◽  
Gregory B. Poole
Keyword(s):  
X Ray ◽  
Galaxy Groups

scholarly journals On the occupation of X-ray-selected galaxy groups by radio active galactic nuclei since z = 1.3★

2011 ◽  
Vol 416 (1) ◽  
pp. L31-L35 ◽  
Author(s):  
V. Smolčić ◽  
A. Finoguenov ◽  
G. Zamorani ◽  
E. Schinnerer ◽  
M. Tanaka ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
X Ray ◽  
Galaxy Groups

scholarly journals A volume-limited sample of X-ray galaxy groups and clusters – III. Central abundance drops

2014 ◽  
Vol 447 (1) ◽  
pp. 417-436 ◽  
Author(s):  
E. K. Panagoulia ◽  
J. S. Sanders ◽  
A. C. Fabian
Keyword(s):  
Limited Sample ◽  
X Ray ◽  
Galaxy Groups

scholarly journals Mining the gap: evolution of the magnitude gap in X-ray galaxy groups from the 3-square-degree XMM coverage of CFHTLS

2014 ◽  
Vol 566 ◽  
pp. A140 ◽  
Author(s):  
G. Gozaliasl ◽  
A. Finoguenov ◽  
H. G. Khosroshahi ◽  
M. Mirkazemi ◽  
M. Salvato ◽  
...  
Keyword(s):  
X Ray ◽  
Galaxy Groups

scholarly journals The relation between the diffuse X-ray luminosity and the radio power of the central AGN in galaxy groups

2020 ◽  
Vol 497 (2) ◽  
pp. 2163-2174
Author(s):  
T Pasini ◽  
M Brüggen ◽  
F de Gasperin ◽  
L Bîrzan ◽  
E O’Sullivan ◽  
...  
Keyword(s):  
Radio Emission ◽  
Galaxy Clusters ◽  
Active Galactic Nucleus ◽  
Statistical Tests ◽  
Control Sample ◽  
Radio Galaxies ◽  
Very Large Array ◽  
X Ray ◽  
Galaxy Groups ◽  
Hydrodynamical Simulations

ABSTRACT Our understanding of how active galactic nucleus feedback operates in galaxy clusters has improved in recent years owing to large efforts in multiwavelength observations and hydrodynamical simulations. However, it is much less clear how feedback operates in galaxy groups, which have shallower gravitational potentials. In this work, using very deep Very Large Array and new MeerKAT observations from the MIGHTEE survey, we compiled a sample of 247 X-ray selected galaxy groups detected in the COSMOS field. We have studied the relation between the X-ray emission of the intra-group medium and the 1.4 GHz radio emission of the central radio galaxy. For comparison, we have also built a control sample of 142 galaxy clusters using ROSAT and NVSS data. We find that clusters and groups follow the same correlation between X-ray and radio emission. Large radio galaxies hosted in the centres of groups and merging clusters increase the scatter of the distribution. Using statistical tests and Monte Carlo simulations, we show that the correlation is not dominated by biases or selection effects. We also find that galaxy groups are more likely than clusters to host large radio galaxies, perhaps owing to the lower ambient gas density or a more efficient accretion mode. In these groups, radiative cooling of the intra-cluster medium could be less suppressed by active galactic nucleus heating. We conclude that the feedback processes that operate in galaxy clusters are also effective in groups.

scholarly journals X-RAY-SELECTED GALAXY GROUPS IN BOÖTES

2014 ◽  
Vol 794 (1) ◽  
pp. 88 ◽  
Author(s):  
Bruna Vajgel ◽  
Christine Jones ◽  
Paulo A. A. Lopes ◽  
William R. Forman ◽  
Stephen S. Murray ◽  
...  
Keyword(s):  
X Ray ◽  
Galaxy Groups

scholarly journals Caught in the Act: Witnessing a~Transforming Spiral in a Galaxy Group

2006 ◽  
Vol 2 (S235) ◽  
pp. 239-239
Author(s):  
J. Rasmussen ◽  
T. J. Ponman ◽  
J. S. Mulchaey
Keyword(s):  
Galaxy Clusters ◽  
Direct Evidence ◽  
X Ray ◽  
Galaxy Groups ◽  
Ram Pressure

AbstractRam pressure stripping of galaxies is believed to be inefficient in galaxy groups, but Chandra X-ray observations of the starburst spiral NGC 2276, a member of a small galaxy group, shows that this galaxy is being stripped of its gas at a rate of ~5 M⊙ yr−1 due to its motion through hot intragroup gas. This provides direct evidence that mechanisms associated with ram pressure can strip galaxies of their gas in systems much smaller than galaxy clusters.

The RASSCALS: An X‐Ray and Optical Study of 260 Galaxy Groups

2000 ◽  
Vol 534 (1) ◽  
pp. 114-132 ◽  
Author(s):  
Andisheh Mahdavi ◽  
Hans Bohringer ◽  
Margaret J. Geller ◽  
Massimo Ramella
Keyword(s):  
Optical Study ◽  
X Ray ◽  
Galaxy Groups
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