Results 141 to 150 of about 87,085 (268)

The Manhattan Suite: Accelerated Galaxy Evolution in the Early Universe

open access: yesThe Astrophysical Journal
Observational advances have allowed the detection of galaxies, protoclusters, and galaxy clusters at higher and higher redshifts, opening a new view into extreme galaxy evolution.
Douglas Rennehan
doaj   +1 more source

The ACS Nearby Galaxy Survey Treasury. X. Quantifying the Star Cluster Formation Efficiency of Nearby Dwarf Galaxies

open access: yes, 2012
We study the relationship between the field star formation and cluster formation properties in a large sample of nearby dwarf galaxies. We use optical data from the Hubble Space Telescope and from ground-based telescopes to derive the ages and masses of ...
Anil C. Seth   +61 more
core   +1 more source

The luminosities of the brightest cluster galaxies and brightest satellites in SDSS groups

open access: yes, 2012
We show that the distribution of luminosities of Brightest Cluster Galaxies in an SDSS-based group catalog suggests that BCG luminosities are just the statistical extremes of the group galaxy luminosity function.
Aseem Paranjape   +25 more
core   +1 more source

Using Neural Networks to Automate the Identification of Brightest Cluster Galaxies in Large Surveys

open access: yesThe Astrophysical Journal
Brightest cluster galaxies (BCGs) lie deep within the largest gravitationally bound structures in existence. Though some cluster finding techniques identify the position of the BCG and use it as the cluster center, other techniques may not automatically ...
Patrick Janulewicz   +2 more
doaj   +1 more source

Detecting Star Formation in Brightest Cluster Galaxies with GALEX

open access: yes, 2010
We present the results of GALEX observations of 17 cool core (CC) clusters of galaxies. We show that GALEX is easily capable of detecting star formation in brightest cluster galaxies (BCGs) out to $z\ge 0.45$ and 50-100 kpc.
A. K. Hicks   +32 more
core   +1 more source

Utilizing Voronoi Tessellations to Determine Radial Density Profiles

open access: yesThe Astronomical Journal
We have developed a novel method of determining 2D radial density profiles for astronomical systems of discrete objects using Voronoi tessellations. This Voronoi-based method was tested against the standard annulus-based method on five simulated systems ...
Veronika Dornan, William E. Harris
doaj   +1 more source

Mining the gap: evolution of the magnitude gap in X-ray galaxy groups from the 3 square degree XMM coverage of CFHTLS

open access: yes, 2014
We present a catalog of 129 X-ray galaxy groups, covering a redshift range 0 ...
Brimioulle, F.   +17 more
core   +3 more sources

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