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A Catalog of Morphological Types in 10 Distant Rich Clusters of Galaxies

Smail, Ian; Ellis, Richard S.; Dressler, Alan +4 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…

Hubble Space Telescope Imaging of Compact Steep-Spectrum Radio Sources

Golombek, D.; Sparks, W. B.; Macchetto, F. +8 more

We present Hubble Space Telescope WFPC2 images taken through a broad red filter (F702W) of 30 Third Cambridge Catalog compact steep spectrum (CSS) radio sources. We have overlaid radio maps taken from the literature on the optical images to determine the radio-optical alignment and to study detailed correspondence. All CSS sources for which the re…

Hubble Space Telescope Snapshot Survey of 3CR Radio Source Counterparts. II. Radio Galaxies with Z > 0.5

Baum, Stefi A.; McCarthy, Patrick J.; Sparks, William B. +5 more

We present images of 51 3CR radio galaxies with 0.5 < z < 2.5 obtained in the snapshot mode with the Hubble Space Telescope. The images are short exposures with the Planetary Camera and the F702W filter. A wide range of morphologies and surface brightness are seen on subarcsecond scales. Some are very strongly nucleated, and their light is m…

Galaxy Morphology without Classification: Self-organizing Maps

Griffiths, Richard E.; Ratnatunga, Kavan U.; Naim, Avi

We examine a general framework for visualizing data sets of high (greater than 2) dimensionality and demonstrate the framework by taking the morphology of galaxies at moderate redshifts as an example. The distributions of various populations of such galaxies are examined in a space spanned by four purely morphological parameters. Galaxy images are…

Hubble Space Telescope Wide Field Planetary Camera 2 Imaging of the Crab Nebula. I. Observational Overview

Blair, William P.; Davidson, Kris; Henry, Richard B. C. +3 more

We present Hubble Space Telescope WFPC2 images of a portion of the Crab Nebula supernova remnant obtained using narrow passband filters. These images show a wide range of filament morphologies including small individual isolated knots, long smooth arcs, and chaotic filament complexes, with evidence that some filament cores are far denser and coole…

Infrared Photometry of 487 Sources in the Inner Regions of NGC 5128 (Centaurus A)

Minniti, Dante; Alonso, M. Victoria

We study the sources present in the inner 3 kpc region of NGC 5128 (Cen A), most of which are star clusters of different ages. Photometry of archival Hubble Space Telescope WFPC images (F675W filter) is complemented with IR photometry (JHK' filters) obtained with the IRAC2B infrared array camera at the ESO/MPI 2.2 m telescope. From IR color maps w…