scholarly journals Galaxy Orbits for Galaxy Clusters in the Sloan Digital Sky Survey and Two Degree Field Galaxy Redshift Survey

2008 ◽  
Vol 676 (1) ◽  
pp. 218-247 ◽  
Author(s):  
Ho Seong Hwang ◽  
Myung Gyoon Lee
Keyword(s):  
Galaxy Clusters ◽  
Sloan Digital Sky Survey ◽  
Sky Survey ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Field Galaxy

Two Degree Field Galaxy Redshift Survey and Sloan Digital Sky Survey Galaxy Group Density Profiles

2005 ◽  
Vol 629 (1) ◽  
pp. 158-171 ◽  
Author(s):  
Eugenia Diaz ◽  
Ariel Zandivarez ◽  
Manuel E. Merchan ◽  
Hernan Muriel
Keyword(s):  
Sloan Digital Sky Survey ◽  
Density Profiles ◽  
Sky Survey ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Group Density ◽  
Field Galaxy

CONSTRAINT ON THE KINEMATICAL AND DYNAMICAL MODEL FROM THE LATEST OBSERVATIONAL DATA

2010 ◽  
Vol 25 (36) ◽  
pp. 3033-3046 ◽  
Author(s):  
JIANBO LU ◽  
YABO WU ◽  
LIXIN XU
Keyword(s):  
Observational Data ◽  
Acoustic Oscillation ◽  
Sloan Digital Sky Survey ◽  
Dynamical Model ◽  
Sky Survey ◽  
Type Ia ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
Ia Supernovae ◽  
Field Galaxy

The kinematical model j(z) = j0and dynamical model wde(z) = w0, are constrained from the latest observational data: Union2 data including 557 type Ia supernovae (SNIa), 15 observational Hubble data (OHD), baryon acoustic oscillation (BAO) data from Sloan Digital Sky Survey (SDSS) and Two-degree Field Galaxy Redshift Survey (2dFGRS) and CMB data from seven-year WMAP. We get the current values of deceleration parameter q0, jerk parameter j0, dimensionless matter density Ωm, equation of state for dark energy w0and transition redshift zT. Furthermore, it is shown that for both kinematical and dynamical models, the constraint results support for the cosmic concordance model, ΛCDM.

scholarly journals Measuring the Baryon Acoustic Oscillation scale using the Sloan Digital Sky Survey and 2dF Galaxy Redshift Survey

2007 ◽  
Vol 381 (3) ◽  
pp. 1053-1066 ◽  
Author(s):  
Will J. Percival ◽  
Shaun Cole ◽  
Daniel J. Eisenstein ◽  
Robert C. Nichol ◽  
John A. Peacock ◽  
...  
Keyword(s):  
Acoustic Oscillation ◽  
Sloan Digital Sky Survey ◽  
Baryon Acoustic Oscillation ◽  
Sky Survey ◽  
Redshift Survey ◽  
Galaxy Redshift

scholarly journals Anisotropic infall in the outskirts of OmegaWINGS galaxy clusters

2020 ◽  
Vol 493 (4) ◽  
pp. 4950-4959
Author(s):  
Juan Manuel Salerno ◽  
Héctor J Martínez ◽  
Hernán Muriel ◽  
Valeria Coenda ◽  
Benedetta Vulcani ◽  
...  
Keyword(s):  
Phase Space ◽  
Survey Data ◽  
Galaxy Clusters ◽  
Galaxy Groups ◽  
Data Release ◽  
Long Time ◽  
Redshift Survey ◽  
Galaxy Redshift ◽  
First Time ◽  
Field Galaxy

ABSTRACT We study the effects of the environment on galaxy quenching in the outskirts of clusters at 0.04 < z < 0.08. We use a subsample of 14 WINGS and OmegaWINGS clusters that are linked to other groups/clusters by filaments and study separately galaxies located in two regions in the outskirts of these clusters according to whether they are located towards the filaments’ directions or not. We also use samples of galaxies in clusters and field as a comparison. Filamentary structures linking galaxy groups/clusters were identified over the Six Degree Field Galaxy Redshift Survey Data Release 3. We find a fraction of passive galaxies in the outskirts of clusters intermediate between that of the clusters and the field’s. We find evidence of a more effective quenching in the direction of the filaments. We also analyse the abundance of post-starburst (PS) galaxies in the outskirts of clusters focusing our study on two extreme sets of galaxies according to their phase-space position: backsplash and true infallers. We find that up to $\sim 70{{\ \rm per\ cent}}$ of PS galaxies in the direction of filaments are likely backsplash, while this number drops to $\sim 40{{\ \rm per\ cent}}$ in the isotropic infall region. The presence of this small fraction of galaxies in filaments that are falling into clusters for the first time and have been recently quenched, supports a scenario in which a significant number of filament galaxies have been quenched long time ago.

scholarly journals Searching for Mg ii absorbers in and around galaxy clusters

2021 ◽  
Vol 503 (3) ◽  
pp. 4309-4319
Author(s):  
Jong Chul Lee ◽  
Ho Seong Hwang ◽  
Hyunmi Song
Keyword(s):  
Galaxy Clusters ◽  
Detection Rate ◽  
Massive Star ◽  
Sloan Digital Sky Survey ◽  
Number Density ◽  
Cluster Galaxies ◽  
Star Forming ◽  
Quasar Spectra ◽  
Sky Survey ◽  
The Galaxy

ABSTRACT To study environmental effects on the circumgalactic medium (CGM), we use the samples of redMaPPer galaxy clusters, background quasars, and cluster galaxies from the Sloan Digital Sky Survey (SDSS). With ∼82 000 quasar spectra, we detect 197 Mg ii absorbers in and around the clusters. The detection rate per quasar is 2.7 ± 0.7 times higher inside the clusters than outside the clusters, indicating that Mg ii absorbers are relatively abundant in clusters. However, when considering the galaxy number density, the absorber-to-galaxy ratio is rather low inside the clusters. If we assume that Mg ii absorbers are mainly contributed by the CGM of massive star-forming galaxies, a typical halo size of cluster galaxies is smaller than that of field galaxies by 30 ± 10 per cent. This finding supports that galaxy haloes can be truncated by interaction with the host cluster.

scholarly journals The CNOC2 field galaxy redshift survey

1999 ◽  
Vol 357 (1750) ◽  
pp. 167-183 ◽  
Author(s):  
R. G Carlberg ◽  
H. K. C. Yee ◽  
S. L. Morris ◽  
H. Lin ◽  
M. Sawicki ◽  
...  
Keyword(s):  
Redshift Survey ◽  
Galaxy Redshift ◽  
Field Galaxy
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