Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.sao.ru/fetch/HL/leda/param/logdc.html
Дата изменения: Mon Dec 23 18:23:59 2013
Дата индексирования: Fri Feb 28 17:30:13 2014
Кодировка:
Поисковые слова: п п п п п п п п п п

Documentation: LEDA: parameter: logdc

Corrected diameter of galaxies: logdc

In RC2 apparent diameters were corrected for galactic extinction and inclination effect according to Heidmann & de Vaucouleurs (1972a,b,c). This question was later revisited after the result by Valentijn (1990, 1994) that galaxy disks may be opaque. The conclusion of Bottinelli et al. (1995) led to the following correction:

log dc = logd25 - C . logr25 + ag . Kd

where C=0.04, ag is the galactic extinction and Kd is given by Fouqué & Paturel (1985) as 0.094 for spiral galaxies and 0.081-0.016 t for early type galaxies with morphological type code t<0.

The D25 diameter and axis ratio are respectively given in the parameters logd25 and logr25 .