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Observations of nearby galaxies reveal a strong correlation between the mass of the central dark object M • and the velocity dispersion σ of the host galaxy, of the form log(M • /M ⊙) = α + β log(σ/σ 0); however, published estimates of the slope β span a wide range (3.75 to 5.3). Merritt & Ferrarese have argued that low slopes (4) arise because of neglect(More)
Using traditional morphological classiications of galaxies in 10 intermediate-redshift (z 0.5) clusters observed with WFPC-2 on the Hubble Space Telescope, we derive relations between morphology and local galaxy density similar to that found by Dressler for low-redshift clusters. Taken collectively, the "morphology-density" relationship, T ? , for these(More)
We present catalogs of objects detected in deep images of 11 fields in 10 distant clusters obtained using WFPC-2 on board the Hubble Space Telescope. The clusters span the redshift range z = 0.37–0.56 and are the subject of a detailed ground-and space-based study to investigate the evolution of galaxies as a function of environment and epoch. The data(More)
We describe a correlation between the mass M ¯ of a galaxy's central black hole and the luminosity-weighted line-of-sight velocity dispersion e within the half-light radius. The result is based on a sample of 26 galaxies, including 13 galaxies with new determinations of black hole masses from Hubble Space Telescope measurements of stellar kinematics. The(More)
1 Observations in part from the Michigan-Dartmouth-MIT (MDM) Observatory. ABSTRACT We report data for I band Surface Brightness Fluctuation (SBF) magnitudes, (V −I) colors, and distance moduli for 300 galaxies. The Survey contains E, S0 and early-type spiral galaxies in the proportions of 49:42:9, and is essentially complete for E galaxies to Hubble(More)
We present spectroscopic observations of galaxies in the fields of 10 distant clusters for which we have previously presented deep imaging with WFPC2 on board the Hubble Space Telescope. The clusters span the redshift range z = 0.37–0.56 and are the subject of a detailed ground-and space-based study to investigate the evolution of galaxies as a function of(More)
Disturbed spiral galaxies with high rates of star formation pervaded clusters of galaxies just a few billion years ago, but nearby clusters exclude spirals in favor of ellipticals. " Galaxy harassment " (frequent high speed galaxy encounters) drives the morphological transformation of galaxies in clusters, provides fuel for quasars in subluminous hosts and(More)
The quantitative morphological classification of galaxies is important for understanding the origin of type frequency and correlations with environment. However, galaxy morphological classification is still mainly done visually by dedicated individuals, in the spirit of Hubble's original scheme and its modifications. The rapid increase in data on galaxy(More)
We present stellar population parameters of twelve elliptical and S0 galaxies in the Coma Cluster around and including the cD galaxy NGC 4874, based on spectra obtained using the Low Resolution Imaging Spectrograph on the Keck II Telescope. Our data are among the most precise and accurate absorption-line strengths yet obtained for cluster galaxies, allowing(More)