Galaxies morphology and IR photometry. V. (Gavazzi+, 2000)

Details Galaxies morphology and IR photometry. V. (Gavazzi+, 2000) Galaxies morphology and IR photometry. V. (Gavazzi+, 2000)

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ycat..33610863g&link_type=abstract

VizieR On-line Data Catalog: J/A+A/361/863. Originally published in: 2000A&A...361..863G

Computer Science

Galaxies: Photometry, Photometry: Surface, Morphology, Photometry: Infrared

Scientific paper

We present near-infrared H-band (1.65μm) surface brightness profile decomposition for 1157 galaxies in five nearby clusters of galaxies: Coma, A1367, Virgo, A262 and Cancer, and in the bridge between Coma and A1367 in the "Great Wall". The optically selected (mpg<=16.0) sample is representative of all Hubble types, from E to Irr+BCD, except dE and of significantly different environments, spanning from isolated regions to rich clusters of galaxies. We model the surface brightness profiles with a de Vaucouleurs r1/4 law (dV), with an exponential disk law (E), or with a combination of the two (B+D). From the fitted quantities we derive the H band effective surface brightness (μe) and radius (re) of each component, the asymptotic magnitude HT and the light concentration index C31. We find that: i) Less than 50% of the Elliptical galaxies have pure dV profiles. The majority of E to Sb galaxies is best represented by a B+D profile. All Scd to BCD galaxies have pure exponential profiles. ii) The type of decomposition is a strong function of the total H band luminosity (mass), independent of the Hubble classification: the fraction of pure exponential decompositions decreases with increasing luminosity, that of B+D increases with luminosity. Pure dV profiles are absent in the low luminosity range LH<1010L&sun; and become dominant above 1011L&sun;. (1 data file).

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