1.65 µm (H-band) surface photometry of galaxies
G. Gavazzi 1,
P. Franzetti 1,
M. Scodeggio 2,
A. Boselli 3 and
D. Pierini 4
Received 10 April 2000 / Accepted 20 July 2000
We present near-infrared H-band (1.65 µm) 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 () 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 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 () and radius () of each component, the asymptotic magnitude and the light concentration index . 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 and become dominant above .
Key words: galaxies: fundamental parameters galaxies: photometry infrared: galaxies
* Based on observations taken at TIRGO, Gornergrat, Switzerland (operated by CAISMI-CNR, Arcetri, Firenze, Italy) and at the Calar Alto Observatory (operated by the Max-Planck-Institut für Astronomie (Heidelberg) jointly with the Spanish National Commission for Astronomy).
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© European Southern Observatory (ESO) 2000
Online publication: October 10, 2000