Results 11 to 20 of about 2,213,777 (304)
THE REDMAPPER GALAXY CLUSTER CATALOG FROM DES SCIENCE VERIFICATION DATA [PDF]
Astrophysical Journal Supplement Series, 2016 We describe updates to the redMaPPer algorithm, a photometric red-sequence cluster finder specifically designed for large photometric surveys. The updated algorithm is applied to of Science Verification (SV) data from the Dark Energy Survey (DES), and to
E. Rykoff +88 more
semanticscholar +1 more source
The formation of ultradiffuse galaxies in the RomulusC galaxy cluster simulation
, 2020 We study the origins of 122 ultra-diffuse galaxies (UDGs) in the {\sc RomulusC} zoom-in cosmological simulation of a galaxy cluster (M$_{200} = 1.15\times10^{14}$ M$_{\odot}$), one of the only such simulations capable of resolving the evolution and ...
M. Tremmel +5 more
semanticscholar +1 more source
Accretion of galaxy groups into galaxy clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We study the role of group infall in the assembly and dynamics of galaxy clusters in ΛCDM. We select 10 clusters with virial mass M200 ∼ 1014 $\rm M_\odot$ from the cosmological hydrodynamical simulation Illustris and follow their galaxies with stellar mass M⋆ ≥ 1.5 × 108 $\rm M_\odot$.
Laura V. Sales +3 more
openaire +4 more sources
Weighing the giants– V. Galaxy cluster scaling relations [PDF]
, 2016 We present constraints on the scaling relations of galaxy cluster X-ray luminosity, temperature and gas mass (and derived quantities) with mass and redshift, employing masses from robust weak gravitational lensing measurements.
A. Mantz +12 more
semanticscholar +1 more source
Alignment of galaxies and clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 We investigated the influence of environment on cluster galaxies by examining the alignment of the brightest cluster galaxy (BCG) position angle with respect to the host cluster X-ray position angle. The cluster position angles were measured using high spatial resolution X-ray data taken from the Chandra ACIS archive, that significantly improved the ...
Boehringer, Hans +5 more
openaire +4 more sources
Simulations of ram-pressure stripping in galaxy-cluster interactions [PDF]
, 2016 Observationally, the quenching of star-forming galaxies appears to depend both on their mass and environment. The exact cause of the environmental dependence is still poorly understood, yet semi-analytic models (SAMs) of galaxy formation need to ...
Dominik Steinhauser +2 more
semanticscholar +1 more source
THE ASSEMBLY OF GALAXY CLUSTERS [PDF]
The Astrophysical Journal, 2008 We study the formation of fifty-three galaxy cluster-size dark matter halos formed within a pair of cosmological LCDM N-body simulations, and track the accretion histories of cluster subhalos with masses large enough to host 0.1L* galaxies. By associating subhalos with cluster galaxies, we find the majority of galaxies in clusters experience no pre ...
Berrier, Joel C. +5 more
openaire +5 more sources
DISCOVERY OF A GALAXY CLUSTER WITH A VIOLENTLY STARBURSTING CORE AT z = 2.506 [PDF]
, 2016 We report the discovery of a remarkable concentration of massive galaxies with extended X-ray emission at zspec = 2.506, which contains 11 massive (M* ≳ 1011 M⊙) galaxies in the central 80 kpc region (11.6σ overdensity).
Tao Wang +19 more
semanticscholar +1 more source
Structures in Galaxy Clusters [PDF]
The Astrophysical Journal, 1994 (16 pages in LATEX, 4 tables in LATEX are at the end of the file, the figures not included are available upon request), REF SISSA 158/93 ...
Marisa Girardi +6 more
openaire +5 more sources
ON THE DETERMINATION OF GALAXY STRUCTURE ELLIPTICITY
Odessa Astronomical Publications, 2007 We discuss factors influencing the determination of the observed shape of galaxy clusters when the covariance ellipse method is involved. The analysis of 377 Abell clusters show that at greater distances from the cluster center the ellipticity is rather ...
M. Biernacka +3 more
doaj +1 more source