Results 1 to 10 of about 1,031,806 (246)

Cosmology with Clusters of Galaxies [PDF]

open access: yes, 2008
In this Chapter I review the role that galaxy clusters play as tools to constrain cosmological parameters. I will concentrate mostly on the application of the mass function of galaxy clusters, while other methods, such as that based on the baryon fraction, are covered by other Chapters of the book.
openaire   +3 more sources

ON THE CLUSTERING OF SUBMILLIMETER GALAXIES [PDF]

open access: yesThe Astrophysical Journal, 2011
We measure the angular two-point correlation function of sub-millimeter galaxies (SMGs) from 1.1-millimeter imaging of the COSMOS field with the AzTEC camera and ASTE 10-meter telescope. These data yields one of the largest contiguous samples of SMGs to date, covering an area of 0.72 degrees^2 down to a 1.26 mJy/beam (1-sigma) limit, including 189 (328)
Williams, CC   +16 more
openaire   +3 more sources

Massive star clusters in the semi-analytical galaxy formation model L-Galaxies 2020

open access: yesAstronomy & Astrophysics
It has been established that a direct link exists between the formation history of star cluster populations and their host galaxies. However, our lack of understanding of the assembly of star cluster populations impedes our ability to use them as tracers
Hoyer Nils   +9 more
doaj   +1 more source

Probing the evolution of galaxy clusters using SZ effect and non-thermal emission: First results from A1413 [PDF]

open access: yesEPJ Web of Conferences
Mass is the most fundamental property of galaxy clusters. However, measuring it is still a challenge. Calibrating mass from intracluster medium observables such as the Sunyaev-Zel’dovich (SZ) effect is subject to uncertainty and biases because of the ...
Pachchigar M., Perrott Y., Parashar T.
doaj   +1 more source

Novae in Clusters and Galaxies [PDF]

open access: yesInternational Astronomical Union Colloquium, 1990
My main goal in giving this review is NOT to induce hibernation in the audience. Rather, it is to survey the known cases of erupting classical novae in open and globular clusters, and galaxies external to the Milkey Way. More important, I want to emphasize what these novae in stellar systems can teach us about nova eruptions.
openaire   +1 more source

GALAXY CLUSTERS AT HIGH REDSHIFT AND EVOLUTION OF BRIGHTEST CLUSTER GALAXIES [PDF]

open access: yesThe Astrophysical Journal, 2011
Identification of high redshift clusters is important for studies of cosmology and cluster evolution. Using photometric redshifts of galaxies, we identify 631 clusters from the Canada-France-Hawaii Telescope (CFHT) Wide field, 202 clusters from the CHFT Deep field, 187 clusters from the Cosmic Evolution Survey (COSMOS) and 737 clusters from the Spitzer
Wen, Z. L., Han, J. L.
openaire   +2 more sources

From the Densest Clusters to the Emptiest Voids: No Evidence for Environmental Effects on the Galaxy Size–Stellar Mass Relation at Low Redshift

open access: yesThe Astrophysical Journal
We present a comprehensive study of the galaxy size–stellar mass relation (SMR) at low redshift ( z ≤ 0.125), using a large spectroscopic sample from the Sloan Digital Sky Survey Data Release 13 (SDSS DR13).
Mohamed H. Abdullah   +3 more
doaj   +1 more source

CLASH-VLT velocity anisotropy profiles in a stack of massive galaxy clusters

open access: yesAstronomy & Astrophysics
We measured the velocity anisotropy profile, β(r), of different galaxy cluster member populations by analysing the stacked projected phase space of nine massive (M200c > 7 × 1014 M⊙) galaxy clusters at intermediate redshifts (0.18 
Maraboli Enrico   +6 more
doaj   +1 more source

THE ELLIPTICITIES OF GALAXIES IN GALAXY CLUSTERS OF DIFFERENT MORPHOLOGICAL TYPE

open access: yesOdessa Astronomical Publications, 2014
The distribution of galaxy ellipticities was analyzed for 207 rich PF galaxy clusters found in the Munster Red Sky Survey Galaxy Catalogue. Clusters with BM types from a comparison with the ACO catalogue were also classified on the new scheme.
E. A. Panko, P. Flin
doaj   +1 more source

The “Sausage” and “Toothbrush” clusters of galaxies and the prospects of LOFAR observations of clusters of galaxies [PDF]

open access: yesAstronomische Nachrichten, 2013
AbstractLOFAR, the Low Frequency Radio Array, is a new pan‐European radio telescope that is almost fully operational. One of its main drivers is to make deep images of the low frequency radio sky. To be able to do this a number of challenges need to be addressed. These include the high data rates, removal of radio frequency interference, calibration of
Jackson, Neal   +30 more
openaire   +7 more sources

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