Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.167..183a&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 167, no. 2, May 1990, p. 183-219.
Astronomy and Astrophysics
Astrophysics
9
Andromeda Galaxy, Astronomical Catalogs, Galactic Structure, Hubble Constant, Red Shift, Milky Way Galaxy, Morphology, Physical Properties, Seyfert Galaxies
Scientific paper
It is shown that the Sb galaxies have apparent magnitudes which vary almost exactly as if their redshifts were a measure of the distance at which they are observed, while the Sc do not exhibit a linear Hubble relation. An attempt is made to determine whether the Sc discordance from the Hubble law is caused by Malmquist bias operating in this fainter luminosity class of galaxies or there are inherent fundamental peculiarities. To this purpose the search is undertaken for other kinds of galaxies physically associated which these deviating Sc's. It is shown that luminosity criterion (Tully-Fisher) gives much smaller distances for these galaxies than their redshifts do. The interaction of specific high redshift ScI's with nearby galaxies is presented as an independent proof that ScI's are generally small, low luminosity galaxies.
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