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68 papers · 1 filter
Optical and X-ray clusters as tracers of the supercluster-void network. III Distribution of Abell and APM clusters
M. Einasto, J. Einasto, E. Tago +3
We present a comparison of Abell and APM clusters of galaxies as tracers of the large scale structure of the Universe. We investigate selection functions of both cluster catalogs.…
Optical and X-ray clusters as tracers of the supercluster-void network. II The spatial correlation function
E. Tago, J. Einasto, M. Einasto +2
We study the space distribution of Abell and X-ray selected clusters of galaxies from the ROSAT Bright Source Catalog, and determine correlation functions for both cluster samples.…
Optical and X-ray clusters as tracers of the supercluster-void network. I Superclusters of Abell and X-ray clusters
M. Einasto, J. Einasto, E. Tago +2
We study the distribution of X-ray selected clusters of galaxies with respect to superclusters determined by Abell clusters of galaxies and show that the distribution of X-ray clus…
Colors of 2625 Quasars at 0<z<5 Measured in the Sloan Digital Sky Survey Photometric System
Gordon T. Richards, Xiaohui Fan, Donald P. Schneider +3
We present an empirical investigation of the colors of quasars in the Sloan Digital Sky Survey (SDSS) photometric system. The sample studied includes 2625 quasars with SDSS photome…
The ROSAT-ESO Flux-Limited X-Ray (REFLEX) Galaxy Cluster Survey III: The Power Spectrum
Peter Schuecker, Hans Boehringer, Luigi Guzzo +11
We present a measure of the power spectrum on scales from 15 to 800 Mpc/h using the ROSAT-ESO Flux-Limited X-Ray(REFLEX) galaxy cluster catalogue. The REFLEX survey provides a samp…
The Core-Wing Anomaly of Cool Ap Stars: Abnormal Balmer Profiles
Charles R. Cowley, S. Hubrig, T. A. Ryabchikova +3
Paper by Cowley et al. The Core-Wing Anomaly Etc. The profiles of H in a number of cool Ap stars are anomalous. Broad wings, indicative of temperatures in the range 7000-8000K e…