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Date and Time of the Query: 2019-03-21 T09:09:31 PDT
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For refcode 2002MNRAS.332..422P:
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Copyright by Royal Astronomical Society. 2002MNRAS.332..422P 1.65-micron (H-band) surface photometry of galaxies - VIII. The near-IR {kappa} space at z = 0 D. Pierini, G. Gavazzi, P. Franzetti, M. Scodeggio and A. Boselli ABSTRACT We present the distribution of a statistical sample of nearby galaxies in the {kappa}-space ({kappa}_1_ is proportional to log M, {kappa}_2_ is proportional to log I_e_^3^M/L, {kappa}_3_ is proportional to log M/L). Our study is based on near-IR (H-band: {lambda} = 1.65 microns) observations, for the first time comprising early- and late-type systems. Our data confirm that the mean effective dynamical mass-to-light ratio M/L of the E + S0 + S0a galaxies increases with increasing effective dynamical mass M, as expected from the existence of the Fundamental Plane relation. Conversely, spiral and Im/BCD galaxies show a broad distribution in M/L with no detected trend of M/L with M, the former galaxies having M/L values about twice larger than the latter, on average. For all the late-type galaxies, the M/L increases with decreasing effective surface intensity I_e_, consistent with the existence of the Tully-Fisher relation. These results are discussed on the basis of the assumptions behind the construction of the {kappa}-space and their limitations. Our study is complementary to a previous investigation in the optical (B-band: {lambda} = 0.44 microns) and allows us to study wavelength dependences of the galaxy distribution in the {kappa}-space. As a first result, we find that the galaxy distribution in the {kappa}_1_-{kappa}_2_ plane reproduces the transition from bulgeless to bulge-dominated systems in galaxies of increasing dynamical mass. Conversely, it appears that the M/L of late-types is higher (lower) than that of early-types with the same M in the near-IR (optical). The origins of this behaviour are discussed in terms of dust attenuation and star formation history. Keywords: galaxies: elliptical and lenticular, cD - galaxies: fundamental parameters - galaxies: spiral - galaxies: stellar content - infrared: galaxies.
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