Infrared photometry of galaxies in the Butcher-Oemler cluster 0024 + 1654

Details Infrared photometry of galaxies in the Butcher-Oemler cluster 0024 + 1654 Infrared photometry of galaxies in the Butcher-Oemler cluster 0024 + 1654

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.217..551l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 217, Dec. 1, 1985, p. 551-562.

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14

Astronomical Photometry, Galactic Clusters, Infrared Photometry, Balmer Series, Color, Color-Magnitude Diagram, Spiral Galaxies, Starburst Galaxies, Stellar Evolution, Ubv Spectra

Scientific paper

Infrared photometry is presented for 21 galaxies that are spectroscopically confirmed members of the Butcher-Oemler cluster C10024 + 1654 at z = 0.39. These data are combined with optical CCD photometry and transformed to produce rest-frame UBVK colors. The distribution of colors in the (U-V)/(V-K) plane is analyzed. The 11 'red' galaxies have colors that are broadly similar to those of nearby elliptical galaxies. All but one of the 10 'blue' galaxies have the colors of nearby spiral galaxies, including one Im-type galaxy, and other interpretations, e.g., a young age, may be discounted. The (V-K) color of the remaining 'blue' galaxy, however, suggests the presence of a substantial intermediate age (about 1 Gyr) stellar population and since this is also the only galaxy with optical Balmer absorption but no forbidden O II 3727 emission, it is probably an example of an old starburst galaxy not thought hitherto to exist in this cluster. It is shown that there is a color-magnitude relation for the 'red' galaxies in (V-K)/K but that the colors are systematically redder than those found in Coma ellipticals and are more similar to those found in Virgo.

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