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14 papers · 2 filters
CCD uvbyHbeta Photometry in Clusters: I. The Open Cluster Standard, IC 4651
B. J. Anthony-Twarog, B. A. Twarog
CCD photometry of the intermediate-age open cluster, IC 4651, on the uvbyHbeta system is presented and analyzed. By using a combination of the information from the color-magnitude…
Wavelength Doesn't Matter: Optical vs. X-ray Luminosities of Galaxy Clusters
Christopher J. Miller, Adrian L. Melott, Robert C. Nichol
We examine the relationship between the total X-ray and optical luminosities of groups and clusters of galaxies taken from various samples in the literature. The clusters and group…
Redshift Surveys and the Value of Omega
Hume A. Feldman, Adrian L. Melott
We compare the statistical properties of structures normal and transverse to the line of sight which appear in observational data from redshift surveys. We present a statistic whic…
Environmental Dependence of the Fundamental Plane of Galaxy Clusters
Christopher J. Miller, Adrian Melott, Patrick Gorman
Galaxy clusters approximate a planar (FP) distribution in a three-dimensional parameter space which can be characterized by optical luminosity, half-light radius, and X-ray luminos…
Massive Cooling Flow Clusters Inhabit Crowded Environments
Chris Loken, Adrian L. Melott, Christopher J. Miller
With the availability of large-scale redshift survey data, it is now becoming possible to explore correlations between large-scale structure and the properties and morphologies of…
The Formation and Evolution of Young Globular Clusters in NGC 3256
S. E. Zepf, K. M. Ashman, J. English +2
We present images of the recent galaxy merger NGC 3256 obtained with the WFPC2 of the Hubble Space Telescope in B and I filters. We show that there is a large population of more th…