NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-25 T02:03:10 PDT
Help | Comment | NED Home

For refcode 2015ApJ...807..178W:
There are 133159 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2015ApJ...807..178W Calibration of the Optical Mass Proxy for Clusters of Galaxies and an Update of the WHL12 Cluster Catalog Wen, Z. L.; Han, J. L. Abstract. Accurately determining the mass of galaxy clusters is fundamental for many studies of cosmology and galaxy evolution. We collect and rescale the cluster masses of 1191 clusters of 0.05\lt z\lt 0.75 estimated by X-ray or Sunyaev--Zeldovich measurements and use them to calibrate the optical mass proxy. The total r-band luminosity (in units of {L}^*^) of these clusters is obtained by using spectroscopic and photometric data of the Sloan Digital Sky Survey (SDSS). We find that the correlation between the cluster mass {M}_500_ and total r-band luminosity {L}_500_ significantly evolves with redshift. After correcting for the evolution, we define a new cluster richness {R}_L*,500_={L}_500_ E{(z)}^1.40^ as the optical mass proxy. By using this newly defined richness and the recently released SDSS DR12 spectroscopic data, we update the WHL12 cluster catalog and identify 25,419 new rich clusters at high redshift. In the SDSS spectroscopic survey region, about 89% of galaxy clusters have spectroscopic redshifts. The mass can be estimated with a scatter of 0.17 dex for the clusters in the updated catalog. Key words: galaxies: clusters: general, galaxies: distances and redshifts
There are 133159 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home