Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...150..192f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 150, no. 2, Sept. 1985, p. 192-204.
Astronomy and Astrophysics
Astrophysics
54
Astrometry, Astronomical Catalogs, Astronomical Photometry, Galactic Structure, Brightness, Diameters, Magnitude
Scientific paper
Using an improved version of the catalogue of 237 standard photometric diameters of galaxies, compiled in Fouque and Paturel (1983), we reduce the visual diameters of galaxies in great catalogues (ESO, UGC and MCO) to this standard system. We show that this needs introduction of an additive constant 0.3 to the visual diameters, to put them on a photometric system. Bypass products of this study are conversion relations for the axis ratios, comparison of RC2 with our standard system (and evidence of problems with the RC2 axis ratios), discovery of inhomogeneities in the Holmberg (1958) system of diameters, preliminary results for the particular case of low surface brightness (LSB) galaxies and for diameters in other photometric bands (V diameters of Watanabe, 1983). A rather complete study of KD = ∂ log D/∂B is also given, because necessary to reduce photometric systems at different levels between them.
Fouque' Pascal
Paturel Georges
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