THE LUMINOSITY FUNCTION OF STAR CLUSTERS IN 20 STAR-FORMING GALAXIES BASED ON HUBBLE LEGACY ARCHIVE PHOTOMETRY [PDF]
, 2014 Luminosity functions (LFs) have been determined for star cluster populations in 20 nearby (4–30 Mpc), star-forming galaxies based on Advanced Camera for Surveys source lists generated by the Hubble Legacy Archive (HLA). These cluster catalogs provide one
B. Whitmore +6 more
semanticscholar +1 more source
New constraints on f(R) gravity from clusters of galaxies [PDF]
, 2014 The abundance of massive galaxy clusters is a powerful probe of departures from general relativity (GR) on cosmic scales. Despite current stringent constraints placed by stellar and galactic tests, on larger scales alternative theories of gravity such as
M. Cataneo +13 more
semanticscholar +1 more source
Pointing to the minimum scatter: the generalized scaling relations for galaxy clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 6 pages, 3 figures.
Stefano Borgani +7 more
openaire +6 more sources
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).
openaire +3 more sources
Shape of clusters of galaxies as a probe of screening mechanisms in modified gravity. [PDF]
Physical Review Letters, 2012 Scalar fields are crucial components in high energy physics and extensions of general relativity. The fact that they are not observed in the Solar System may be due to a mechanism which screens their presence in high dense regions.
C. Llinares, D. Mota
semanticscholar +1 more source
Thermodynamics of galaxy clusters in modified Newtonian potential [PDF]
Physica Scripta, 2021 We study the thermodynamics of galaxy clusters in a modified Newtonian potential motivated by a general solution to Newton’s ‘sphere-point’ equivalence theorem.
Abdul W. Khanday +2 more
semanticscholar +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
openaire +5 more sources
A general framework to test gravity using galaxy clusters IV: cluster and halo properties in DGP gravity [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT We study and model the properties of galaxy clusters in the normal-branch Dvali–Gabadadze–Porrati (nDGP) model of gravity, which is representative of a wide class of theories that exhibit the Vainshtein screening mechanism. Using the first cosmological simulations that incorporate both full baryonic physics and nDGP, we find ...
Myles A Mitchell +3 more
openaire +5 more sources
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
openaire +5 more sources
THE EFFECT OF SECOND-GENERATION POPULATIONS ON THE INTEGRATED COLORS OF METAL-RICH GLOBULAR CLUSTERS IN EARLY-TYPE GALAXIES [PDF]
, 2013 The mean color of globular clusters (GCs) in early-type galaxies is in general bluer than the integrated color of halo field stars in host galaxies. Metal-rich GCs often appear more associated with field stars than metal-poor GCs, yet show bluer colors ...
C. Chung +3 more
semanticscholar +1 more source