Results 11 to 20 of about 1,810 (225)
THE FIRST GENERATION OF VIRGO CLUSTER DWARF ELLIPTICAL GALAXIES? [PDF]
The Astrophysical Journal, 2009 In the light of the question whether most early-type dwarf (dE) galaxies in clusters formed through infall and transformation of late-type progenitors, we search for an imprint of such an infall history in the oldest, most centrally concentrated dE subclass of the Virgo cluster: the nucleated dEs that show no signatures of disks or central residual ...
Lisker, Thorsten +9 more
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Intermittent Magnetic Fields Generated by Turbulence in Galaxies and Galaxy Clusters [PDF]
Symposium - International Astronomical Union, 1990 The turbulence of intracluster gas in galaxy clusters and interstellar gas in galaxies can act as a dynamo generating chaotic magnetic fields. These fields are concentrated in ropes with the doubled radius of curvature of about the turbulent correlation length l and thickness where Rm is the magnetic Reynolds number.
D. D. Sokoloff +2 more
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Turbulence and vorticity in Galaxy clusters generated by structure formation [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 21 pages, 21 figure.
Vazza, F. +6 more
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Entropy Generation in Merging Galaxy Clusters [PDF]
, 2008 Replaced to correct typo in equation 3. 6 page contribution to the Heating vs. Cooling conference in Garching, August 2006.
Balogh, Michael +3 more
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Gravitational redshift of galaxies in clusters as predicted by general relativity [PDF]
Nature, 2011 The theoretical framework of cosmology is mainly defined by gravity, of which general relativity is the current model. Recent tests of general relativity within the ΛCold Dark Matter (CDM) model have found a concordance between predictions and the observations of the growth rate and clustering of the cosmic web. General relativity has not hitherto been
Wojtak, R. +2 more
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A general framework to test gravity using galaxy clusters – VI. Realistic galaxy formation simulations to study clusters in modified gravity [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We present a retuning of the IllustrisTNG baryonic physics model which can be used to run large-box realistic cosmological simulations with a lower resolution. This new model employs a lowered gas density threshold for star formation and reduced energy releases by stellar and black hole feedback.
Myles A Mitchell +2 more
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Semi-analytical study on the generic degeneracy for galaxy clustering measurements [PDF]
Proceedings of the International Astronomical Union, 2014 AbstractFrom the galaxy power spectrum in redshift space, we derive semi-analytical results on the generic degeneracy of galaxy clustering measurements. Defining the observables A = Gbσ8 and R = Gfσ8, (being G the growth function, b the bias, f the growth rate, and σ8 the amplitude of the power spectrum), we perform a Fisher matrix formalism to ...
Guarnizo, Alejandro +3 more
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Properties of Fossil Groups of Galaxies
, 2021 We review the formation and evolution of fossil groups and clusters from both the theoretical and the observational points of view. In the optical band, these systems are dominated by the light of the central galaxy.
J. Alfonso L. Aguerri, Stefano Zarattini
core +1 more source
Faint Dwarf Galaxies in the Next Generation Virgo Cluster Survey [PDF]
EAS Publications Series, 2011 The Next Generation Virgo Cluster Survey (NGVS) is a CFHT Large Program that is using the wide field of view capabilities of the MegaCam camera to map the entire Virgo Cluster from its core to virial radius. The observing strategy has been optimized to detect very low surface brightness structures in the cluster, including intracluster stellar streams ...
Duc, Pierre-Alain +7 more
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Turbulence generation by substructure motion in clusters of galaxies [PDF]
Advances in Space Research, 2005 Clusters of galaxies form through major merger and/or absorption of smaller groups. In fact, some characteristic structures such as cold fronts, which are likely relevant to moving substructures, are found by {\it Chandra}. It is expected that moving substructures generate turbulence in the intracluster medium (ICM).
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