scholarly journals X‐Ray Scaling Relations of Galaxy Groups in a Hydrodynamic Cosmological Simulation

2002 ◽  
Vol 579 (1) ◽  
pp. 23-41 ◽  
Author(s):  
Romeel Dave ◽  
Neal Katz ◽  
David H. Weinberg
Keyword(s):  
Scaling Relations ◽  
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 The redshift evolution of X-ray and Sunyaev–Zel’dovich scaling relations in the fable simulations

2019 ◽  
Vol 489 (2) ◽  
pp. 2439-2470 ◽  
Author(s):  
Nicholas A Henden ◽  
Ewald Puchwein ◽  
Debora Sijacki
Keyword(s):  
High Redshift ◽  
Scaling Relations ◽  
Observational Constraints ◽  
Lower Mass ◽  
X Ray ◽  
Galaxy Groups ◽  
Mass Scaling ◽  
Low Mass ◽  
Hydrodynamical Simulations ◽  
Intrinsic Scatter

Abstract We study the redshift evolution of the X-ray and Sunyaev–Zel’dovich (SZ) scaling relations for galaxy groups and clusters in the fable suite of cosmological hydrodynamical simulations. Using an expanded sample of 27 high-resolution zoom-in simulations, together with a uniformly sampled cosmological volume to sample low-mass systems, we find very good agreement with the majority of observational constraints up to z ∼ 1. We predict significant deviations of all examined scaling relations from the simple self-similar expectations. While the slopes are approximately independent of redshift, the normalizations evolve positively with respect to self-similarity, even for commonly used mass proxies such as the YX parameter. These deviations are due to a combination of factors, including more effective active galactic nuclei feedback in lower mass haloes, larger binding energy of gas at a given halo mass at higher redshifts, and larger non-thermal pressure support from kinetic motions at higher redshifts. Our results have important implications for cluster cosmology from upcoming SZ surveys such as SPT-3G, ACTpol, and CMB-S4, as relatively small changes in the observable–mass scaling relations (within theoretical uncertainties) have a large impact on the predicted number of high-redshift clusters and hence on our ability to constrain cosmology using cluster abundances. In addition, we find that the intrinsic scatter of the relations, which agrees well with most observational constraints, increases at lower redshifts and for lower mass systems. This calls for a more complex parametrization than adopted in current observational studies to be able to accurately account for selection biases.

scholarly journals Fossil Galaxy Groups; Scaling Relations, Galaxy Properties and Formation of BCGs

2006 ◽  
Vol 2 (S235) ◽  
pp. 214-214
Author(s):  
Habib G. Khosroshahi ◽  
T. J. Ponman
Keyword(s):  
Scaling Relations ◽  
X Ray ◽  
Cluster Galaxies ◽  
Galaxy Groups ◽  
Hot Gas ◽  
Early Formation ◽  
Central Galaxy ◽  
Brightest Cluster Galaxies ◽  
The Galaxy

AbstractWe study fossil galaxy groups, their hot gas and the galaxy properties. Fossils are more X-ray luminous than non-fossil groups, however, they fall comfortably on the conventional L-T relation of galaxy groups and clusters indicating that their X-ray luminosity and temperature are both boosted, arguably, as a result of their early formation. The central dominant galaxy in fossils have optical luminosity comparable to the brightest cluster galaxies (BCGs), however, the isophotal shapes of the central galaxy in fossils are non-boxy in contrast to the isophotes of majority of the BCGs.

scholarly journals Relativistic SZ temperature scaling relations of groups and clusters derived from the BAHAMAS and MACSIS simulations

2020 ◽  
Vol 493 (3) ◽  
pp. 3274-3292 ◽  
Author(s):  
Elizabeth Lee ◽  
Jens Chluba ◽  
Scott T Kay ◽  
David J Barnes
Keyword(s):  
Relativistic Correction ◽  
Scaling Relations ◽  
The Bahamas ◽  
Future Studies ◽  
X Ray ◽  
Galaxy Groups ◽  
Cluster Temperature ◽  
Temperature Scaling ◽  
Temperature Measure ◽  
Significant Mass

ABSTRACT The Sunyaev–Zeldovich (SZ) effect has long been recognized as a powerful cosmological probe. Using the BAHAMAS and MACSIS simulations to obtain ${\gt }10\, 000$ simulated galaxy groups and clusters, we compute three temperature measures and quantify the differences between them. The first measure is related to the X-ray emission of the cluster, while the second describes the non-relativistic thermal SZ (tSZ) effect. The third measure determines the lowest order relativistic correction to the tSZ signal, which is seeing increased observational relevance. Our procedure allows us to accurately model the relativistic SZ (rSZ) contribution and we show that a ${\gtrsim}10\!-\!40{{\ \rm per\ cent}}$ underestimation of this rSZ cluster temperature is expected when applying standard X-ray relations. The correction also exhibits significant mass and redshift evolution, as we demonstrate here. We present the mass dependence of each temperature measure alongside their profiles and a short analysis of the temperature dispersion as derived from the aforementioned simulations. We also discuss a new relation connecting the temperature and Compton-y parameter, which can be directly used for rSZ modelling. Simple fits to the obtained scaling relations and profiles are provided. These should be useful for future studies of the rSZ effect and its relevance to cluster cosmology.

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 Unifying X-ray scaling relations from galaxies to clusters

2015 ◽  
Vol 449 (4) ◽  
pp. 3806-3826 ◽  
Author(s):  
M. E. Anderson ◽  
M. Gaspari ◽  
S. D. M. White ◽  
W. Wang ◽  
X. Dai
Keyword(s):  
Scaling Relations ◽  
X Ray

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 LoCuSS: comparison of observed X-ray and lensing galaxy cluster scaling relations with simulations

2008 ◽  
Vol 482 (2) ◽  
pp. 451-472 ◽  
Author(s):  
Y.-Y. Zhang ◽  
A. Finoguenov ◽  
H. Böhringer ◽  
J.-P. Kneib ◽  
G. P. Smith ◽  
...  
Keyword(s):  
Galaxy Cluster ◽  
Scaling Relations ◽  
X Ray
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