Results 51 to 60 of about 13,046,567 (395)
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
A Measurement of the Galaxy Group-Thermal Sunyaev-Zel’dovich Effect Cross-Correlation Function [PDF]
, 2016 Stacking cosmic microwave background (CMB) maps around known galaxy clusters and groups provides a powerful probe of the distribution of hot gas in these systems via the Sunyaev-Zel'dovich (SZ) effect. A stacking analysis allows one to detect the average
V. Vikram, A. Lidz, B. Jain
semanticscholar +1 more source
Searches for ultracompact dwarf galaxies in galaxy groups [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 8 pages, 2 figures, accepted for publication in ...
Evstigneeva, E. A. +6 more
openaire +3 more sources
The PAndAS View of the Andromeda Satellite System. IV. Global Properties
The Astrophysical Journal, 2023 We build a statistical framework to infer the global properties of the satellite system of the Andromeda galaxy (M31) from the properties of individual dwarf galaxies located in the Pan-Andromeda Archaelogical Survey (PAndAS) and the previously ...
Amandine Doliva-Dolinsky +10 more
doaj +1 more source
Nature of the absorbing gas associated with a galaxy group at z~0.4 [PDF]
, 2016 We present new MUSE observations of quasar field Q2131-1207 with a log N(HI)=19.50+/-0.15 sub-DLA at z_abs=0.42980. We detect four galaxies at a redshift consistent with that of the absorber where only one was known before this study.
C. Péroux +15 more
semanticscholar +1 more source
CHOIRS H I GALAXY GROUPS: THE METALLICITY OF DWARF GALAXIES [PDF]
The Astrophysical Journal, 2014 We present a recalibration of the luminosity-metallicity relation for gas-rich, star-forming dwarfs to magnitudes as faint as M-R similar to -13. We use the Dopita et al. metallicity calibrations to calibrate the relation for all the data in this analysis.
Sweet, Sarah M. +6 more
openaire +3 more sources
Mind the Gap: Tightening the Mass-Richness Relation with Magnitude Gaps [PDF]
, 2013 We investigate the potential to improve optical tracers of cluster mass by exploiting measurements of the magnitude gap, m12, defined as the difference between the r-band absolute magnitude of the two brightest cluster members.
Abazajian +33 more
core +1 more source
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
Groups and Protocluster Candidates in the CLAUDS and HSC-SSP Joint Deep Surveys
The Astrophysical Journal, 2022 Using the extended halo-based group finder developed by Yang et al., which is able to deal with galaxies via spectroscopic and photometric redshifts simultaneously, we construct galaxy group and candidate protocluster catalogs in a wide redshift range (0
Qingyang Li +18 more
doaj +1 more source
The HI content of the Eridanus group of galaxies [PDF]
, 2004 The HI content of galaxies in the Eridanus group is studied using the GMRT observations and the HIPASS data. A significant HI deficiency up to a factor of 2-3 is observed in galaxies in the high galaxy density regions.
A. Biviano +31 more
core +3 more sources