Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...251..485m&link_type=abstract
Astrophysical Journal, Part 1, vol. 251, Dec. 15, 1981, p. 485-496. NSF-supported research.
Astronomy and Astrophysics
Astrophysics
52
Astronomical Photometry, Colorimetry, Galactic Clusters, Luminosity, Astronomical Catalogs, Astronomical Coordinates, Bandpass Filters, Galactic Evolution
Scientific paper
F and J bandpass plates and photographic photometry data are used in a photometric study of the cluster of galaxies around the cD galaxy 3C 295, achieving a photometric accuracy of 0.3 mag or better. Results show the cluster to be relatively poor, with an F luminosity function consistent with the standard Schechter function, and confirm the Butcher and Oemler finding of a color distribution with a large number of blue galaxies. Estimates of the surrounding field show that a high fraction of galaxies bluer than 1.5 are likely to be field galaxies, since 1.5 is approximately the color of an Sab at this redshift. Because cluster members appear to have a color distribution characteristic of local Bautz-Morgan type I clusters, no evidence is found for such evolutionary effects as the stripping of spirals between the 0.46 z-value epoch and the present.
Mathieu Robert D.
Spinrad Hyron
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