1 Hit in 0.039 sec

Near-infrared observations of galaxies in Pisces-Perseus

G. Moriondo, C. Baffa, S. Casertano, G. Chincarini, G. Gavazzi, C. Giovanardi, L. K. Hunt, D. Pierini, M. Sperandio, G. Trinchieri
1999 Astronomy and Astrophysics Supplement Series  
We present near-infrared, H-band (1.65 um), surface photometry of 174 spiral galaxies in the area of the Pisces-Perseus supercluster. The images, acquired with the ARNICA camera mounted on various telescopes, are used to derive radial profiles of surface brightness, ellipticities, and position angles, together with global parameters such as H-band magnitudes and diameters. The mean relation between H-band isophotal diameter D_{21.5} and the B-band D_{25} implies a B-H color of the outer disk
more » ... f the outer disk bluer than 3.5; moreover, D_{21.5}/D_{25} depends on (global) color and absolute luminosity. The correlations among the various photometric parameters suggest a ratio between isophotal radius D_{21.5}/2 and disk scale length of about 3.5 and a mean disk central brightness of 17.5 H-mag arcsec^{-2}. We confirm the trend of the concentration index C_{31} with absolute luminosity and, to a lesser degree, with morphological type. We also assess the influence of non-axisymmetric structures on the radial profiles and on the derived parameters.
doi:10.1051/aas:1999481 fatcat:ns65766nmvfjppeapbswad52te