Results 61 to 70 of about 12,741,185 (402)
Assessing Colour-dependent Occupation Statistics Inferred from Galaxy Group Catalogues [PDF]
, 2015 We investigate the ability of current implementations of galaxy group finders to recover colour-dependent halo occupation statistics. To test the fidelity of group catalogue inferred statistics, we run three different group finders used in the literature
D. Campbell +8 more
semanticscholar +1 more source
Multiwavelength Observations of the Second Largest Known FR II Radio Galaxy, NVSS 2146+82 [PDF]
, 2000 We present multi-frequency VLA, multicolor CCD imaging, optical spectroscopy, and ROSAT HRI observations of the giant FR II radio galaxy NVSS 2146+82. This galaxy, which was discovered by the NRAO VLA Sky Survey (NVSS), has an angular extent of nearly 20'
Alan H. Bridle +20 more
core +2 more sources
A VERY DEEP CHANDRA OBSERVATION OF THE GALAXY GROUP NGC 5813: AGN SHOCKS, FEEDBACK, AND OUTBURST HISTORY [PDF]
, 2015 We present results from a very deep (650 ks) Chandra X-ray observation of the galaxy group NGC 5813, the deepest Chandra observation of a galaxy group to date.
S. Randall +13 more
semanticscholar +1 more source
ASKAP HI imaging of the galaxy group IC 1459 [PDF]
, 2015 We present HI imaging of the galaxy group IC 1459 carried out with six antennas of the Australian SKA Pathfinder equipped with phased-array feeds. We detect and resolve HI in eleven galaxies down to a column density of $\sim10^{20}$ cm$^{-2}$ inside a ~6
P. Serra +78 more
semanticscholar +1 more source
RX J1548.9+0851, a fossil cluster? [PDF]
, 2012 Fossil galaxy groups are spatially extended X-ray sources with X-ray luminosities above L_X,bol > 10^42 h_50^-2 ergs s^-1 and a central elliptical galaxy dominating the optical, the second-brightest galaxy being at least 2 magnitudes fainter in the R ...
Adelman-McCarthy +47 more
core +1 more source
The Evolution of Galaxy Groups and of Galaxies Therein [PDF]
, 2007 Properties of groups of galaxies depend sensitively on the algorithm for group selection, and even the most recent catalogs of groups built from redshift-space selection should suffer from projections and infalling galaxies. The cosmo-dynamical evolution of groups from initial Hubble expansion to collapse and virialization leads to a fundamental track (
openaire +4 more sources
The Nearest Group of Galaxies [PDF]
The Astrophysical Journal, 1999 Has been accepted for publication in the Astrophysical Journal ...
openaire +3 more sources
A BOUND VIOLATION ON THE GALAXY GROUP SCALE: THE TURN-AROUND RADIUS OF NGC 5353/4 [PDF]
, 2015 The first observational evidence for the violation of the maximum turn-around radius on the galaxy group scale is presented. The NGC 5353/4 group is chosen as an ideal target for our investigation of the bound-violation because of its proximity, low ...
Jounghun Lee, Suk Kim, S. Rey
semanticscholar +1 more source
Evolution of galaxy groups in the Illustris simulation
, 2016 We present the first study of evolution of galaxy groups in the Illustris simulation. We focus on dynamically relaxed and unrelaxed galaxy groups representing dynamically evolved and evolving galaxy systems, respectively.
Dariush, Ali A. +2 more
core +2 more sources
First results of the XI Groups Project: Studying an unbiased sample of galaxy groups [PDF]
, 2006 X-ray observations of hot, intergalactic gas in galaxy groups provide a useful means of characterizing the global properties of groups. However, X-ray studies of large group samples have typically involved very shallow X-ray exposures or have been based ...
Miles, Trevor A. +4 more
core +3 more sources