The manifold of early-type galaxies from IR photometry in clusters of galaxies - The Virgo cluster

Details The manifold of early-type galaxies from IR photometry in clusters of galaxies - The Virgo cluster The manifold of early-type galaxies from IR photometry in clusters of galaxies - The Virgo cluster

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249..312r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 2, Sept. 1991, p. 312-322.

Astronomy and Astrophysics

Astrophysics

24

Color-Magnitude Diagram, Infrared Photometry, Red Shift, Virgo Galactic Cluster, Kinetic Energy, Mass To Light Ratios, Morphology

Scientific paper

Galaxies of all morphological types members of the Virgo cluster are studied using accurate near infrared JHK photometry. Color magnitude (J-H), (H-K), (J-K), and (V-K) vs. KT diagrams are established for the galaxies with measured diameters. The (J-K) and (V-K) vs. KT show a color-luminosity relationship. The L-sigma and L-sigma-Ie relationships are investigated for IR wavelengths and compared with similar relationships in other bands. It is found that the L varies as sigma exp n relationship presents systematic slope variations that depend on the wavelength of the photometric bandpass from which n is inferred, the power n increasing toward longer wavelengths. The relationship for the Virgo galaxies with log sigma greater than 2.0 shows a significantly smaller value of the velocity dispersion exponent for both the optical and IR bands, as compared with the corresponding values found in Coma.

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