Spectroscopy of galaxies in distant clusters. IV - A catalog of photometry and spectroscopy for galaxies in seven clusters with Z in the range of 0.35 to 0.55

Details Spectroscopy of galaxies in distant clusters. IV - A catalog of photometry and spectroscopy for galaxies in seven clusters with Z in the range of 0.35 to 0.55 Spectroscopy of galaxies in distant clusters. IV - A catalog of photometry and spectroscopy for galaxies in seven clusters with Z in the range of 0.35 to 0.55

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...78....1d&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 78, Jan. 1992, p. 1-60.

Astronomy and Astrophysics

Astrophysics

275

Astronomical Catalogs, Astronomical Photometry, Astronomical Spectroscopy, Color-Color Diagram, Galactic Clusters, Red Shift, Active Galaxies, Astrometry, Color-Magnitude Diagram, Galactic Evolution, Star Formation

Scientific paper

Photometry and spectroscopy for seven deep fields containing distant clusters of galaxies with z in the range of 0.35 to 0.55 are presented. Positions and photometric parameters, including r-magnitudes g - r and r - i colors, surface brightnesses, and photometric profile types are given for about 2000 galaxies. Low-resolution spectroscopy is obtained from which redshifts are determined for 289 objects, of which 190 are cluster members. These are classified according to dominant spectral features, and examples are plotted in each cluster. Color-magnitude and color-color diagrams are formed which show trends in the cluster populations, and maps are made of the cluster field using the color-color relations to increase the contrast of cluster over field. Galaxies with spectra typical of old stellar populations cluster most strongly, with active galaxies, those with recent or ongoing star formation, or an active nucleus, distributed more diffusely. The g - r color is well correlated with active star formation as judged from spectral features.

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