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Hubble Space Telescope Imaging of Brightest Cluster Galaxies
Seppo Laine, Roeland P. van der Marel, Tod R. Lauer +3
We used the HST WFPC2 to obtain I-band images of the centers of 81 brightest cluster galaxies (BCGs), drawn from a volume-limited sample of nearby BCGs. The images show a rich vari…
Automated object classification with ClassX
A. A. Suchkov, T. A. McGlynn, L. Angelini +13
ClassX is a project aimed at creating an automated system to classify X-ray sources and is envisaged as a prototype of the Virtual Observatory. As a system, ClassX integrates into…
Evidence for Cluster Evolution from an Improved Measurement of the Velocity Dispersion and Morphological Fraction of Cluster 1324+3011 at z = 0.76
Lori M. Lubin, J. B. Oke, Marc Postman
We have carried out additional spectroscopic observations in the field of cluster Cl 1324+3011 at z = 0.76. Combined with the spectroscopy presented in Postman, Lubin & Oke (2001,…
Galaxies with a Central Minimum in Stellar Luminosity Density
Tod R. Lauer, Karl Gebhardt, Douglas Richstone +15
We used HST WFPC2 images to identify six early-type galaxies with surface- brightness profiles that decrease inward over a limited range of radii near their centers. The implied lu…
The Cluster Mass Function from Early SDSS Data: Cosmological Implications
Neta A. Bahcall, Feng Dong, Paul Bode +15
The mass function of clusters of galaxies is determined from 400 deg^2 of early commissioning imaging data of the Sloan Digital Sky Survey; ~300 clusters in the redshift range z =…