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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Large-scale clustering of galaxies in general relativity [PDF]
Physical Review D, 2012 Several recent studies have shown how to properly calculate the observed clustering of galaxies in a relativistic context, and uncovered corrections to the Newtonian calculation that become significant on scales near the horizon. Here, we retrace these calculations and show that, on scales approaching the horizon, the observed galaxy power spectrum ...
Donghui Jeong +2 more
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Testing general relativity: New measurements of gravitational redshift in galaxy clusters
Astronomy & Astrophysics, 2022 Context.The peculiar velocity distribution of cluster member galaxies provides a powerful tool to directly investigate the gravitational potentials within galaxy clusters and to test the gravity theory on megaparsec scales.Aims.We exploit spectroscopic galaxy and galaxy cluster samples extracted from the latest releases of the Sloan Digital Sky Survey (
D. Rosselli +4 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 Cold Dark Matter (CDM) model have found a concordance between predictions and the observations of the growth rate and clustering of the cosmic web.
Radosław Wojtak +2 more
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New perspective on galaxy clustering as a cosmological probe: General relativistic effects [PDF]
Physical Review D, 2009 10 pages, 2 figures, accepted for publication in Physical Review ...
Jaiyul Yoo +2 more
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A general framework for unbiased tests of gravity using galaxy clusters [PDF]
, 2021 PhD thesis, 289 pages, 69 figures, 7 ...
Myles A. Mitchell
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Hydrodynamical simulations of galaxy clusters in dark energy cosmologies - I. General properties [PDF]
, 2011 15 pages, 11 figures, 4 tables, published in MNRAS.
Cristiano De Boni +5 more
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Young massive star clusters in nearby galaxies. I. Identification and general properties of cluster systems [PDF]
, 1999 Using ground-based UBVRI+Halpha CCD photometry we have been carrying out a search for young massive star clusters (YMCs) in a sample consisting of 21 nearby spiral galaxies. We find a large variety concerning the richness of the cluster systems, with some galaxies containing no YMCs at all and others hosting very large numbers of YMCs.
Soeren S. Larsen, T. Richtler
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Cross-correlations between X-ray clusters and the general galaxy population
Astronomy & AstrophysicsThis study presents highly precise measurements of the cross-correlation between volume-limited galaxy samples from the DESI Legacy Survey catalog and X-ray-selected galaxy clusters from eROSITA, which allows for a detailed analysis across redshift and color. Two key findings emerge.
Johan Comparat +7 more
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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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