Документ взят из кэша поисковой машины. Адрес оригинального документа : http://comet.sai.msu.ru/~dmbiz/abst/dd-a Дата изменения: Tue Jan 14 17:06:07 1997 Дата индексирования: Mon Oct 1 20:24:23 2012 Кодировка: Поисковые слова: ngc 253

THE ARGUMENT AGAINST LONG
EXTRAGALACTIC DISTANCE SCALE


Gaseous discs of S0 -- Sd galaxies appears to be gravitationally
stable or close to stability. Dependence of the
gravitational stability parameter of gaseous disc $M_g/M_c$ upon the
color index $(B-V)^0_T$ which reflects a relative number of young
stars, is found. Here $M_g$ is total mass of gas in a galaxy, $M_c$ -
mass of gas which corresponds to marginal stability of gaseous disc
at distances from center. The star formation rate is lower
systematically in galaxies which have more stable discs. Dependence
of the estimation of stability parameter on the adopted distance of
galaxy gives possibility to evaluate the Hubble constant $H_0$ by
comparison distant galaxies sample with the sample of nearby galaxies
which have well-estimated distances using diagram $M_g/M_c \,\div
\,(B-V)^0_T$. We obtained $H_0 \, = \, 92 \pm 12$ km/s/Mpc by this
way. This estimation excludes a long extragalactic distance scale.