The manifold of early-type galaxies from IR photometry - The Coma cluster

Details The manifold of early-type galaxies from IR photometry - The Coma cluster The manifold of early-type galaxies from IR photometry - The Coma cluster

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...229...64r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 229, no. 1, March 1990, p. 64-74.

Astronomy and Astrophysics

Astrophysics

40

Galactic Clusters, Galactic Evolution, Infrared Photometry, Color-Color Diagram, Color-Magnitude Diagram, Elliptical Galaxies, Irregular Galaxies, Mass To Light Ratios, Spiral Galaxies

Scientific paper

Accurate IR JHK photometry was obtained for galaxies of various morphotogical types (38 elliptical, 48 lenticular, 18 spiral, and one irregular), which are members of the Coma cluster, to determine if there are systematic trends in the population and metallicity effects correlated with galaxy morphology and/or luminosity. Results show no definite trends in (J-H), (H-K), and (J-K) vs K(-0.3) diagrams. The aperture-corrected (V-K)sub -0.3 vs K(-0.3) diagram revealed a weak relationship between the color and the magnitude for the early-type galaxies in the Coma cluster. The positive correlations between the metallicity index Mg2 and the luminosities L(B) and L(K) are confirmed; the metallicity effect was found to be steeper in the blue region than in the IR.

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