RASS-SDSS galaxy cluster survey
نویسندگان
چکیده
منابع مشابه
RASS - SDSS Galaxy Clusters Survey . II . A unified picture of the Cluster Luminosity Function
We constructed the composite luminosity function (LF) of clusters of galaxies in the five SDSS photometric bands u,g,r,i and z from the RASS-SDSS galaxy cluster catalog. Background and foreground galaxies are subtracted using both a local and a global background correction to take in account the presence of large scale structures and variations from field to field, respectively. The composite L...
متن کاملRASS - SDSS Galaxy Clusters Survey . III . Scaling relations of galaxy clusters
We use the RASS-SDSS galaxy cluster sample to compare the quality of optical and X-ray luminosities as predictors of other cluster properties such as their masses, temperatures, and velocity dispersions. We use the SDSS spectroscopic data to estimate the velocity dispersions and the virial masses of a subsample of 69 clusters within r500 and r200. The ASCA temperature of the intracluster medium...
متن کاملConstraining the Matter Power Spectrum Normalization Using the Sdss/rass and Reflex Cluster Surveys
We describe a new approach to constrain the amplitude of matter perturbations in the Universe using galaxy clusters. We combine the galaxy cluster X-ray luminosity function of the REFLEX survey with the mass– luminosity relationship obtained via gravitational lensing from a sample of galaxy clusters identified in Sloan Digital Sky Survey commissioning data and confirmed through cross-correlatio...
متن کاملSDSS-IV eBOSS emission-line galaxy pilot survey
The Sloan Digital Sky Survey IV extended Baryonic Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) will observe 195 000 emission-line galaxies (ELGs) to measure the baryonic acoustic oscillation (BAO) standard ruler at redshift 0.9. To test different ELG selection algorithms, 9000 spectra were observed with the SDSS spectrograph as a pilot survey based on data from several imaging surveys. Firs...
متن کاملLarge Scale Structure in the SDSS Galaxy Survey
The Large Scale Structure (LSS) in the galaxy distribution is investigated using the Sloan Digital Sky Survey Early Data Release (SDSS EDR). Using the Minimal Spanning Tree technique we have extracted sets of filaments, of wall-like structures, of galaxy groups, and of rich clusters from this unique sample. The physical properties of these structures were then measured and compared with the exp...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2005
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20041870