Mathematics – Logic
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.263..191h&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 263, no. 1, p. 191-210.
Mathematics
Logic
10
Galactic Clusters, Galactic Evolution, Interstellar Extinction, Stellar Luminosity, Stellar Magnitude, Astronomical Catalogs, Dark Matter, Faint Objects, Red Shift
Scientific paper
The luminosity dependence of clustering in galaxy distributions is analyzed using the CfA redshift catalog, where the magnitude correction for both Galactic and internal extinction is taken into account. It is found that, contrary to previous results, the luminosity dependence of clustering is very weak when the magnitude correction is made, showing no evidence of a positive dependence (luminosity segregation) in the magnitude ranges of interest. The results are not consistent with the luminosity segregation predicted in standard biased cold dark matter scenarios. The morphological dependence is also investigated further. The late-type galaxies cluster in the same way for most magnitude ranges after the magnitude correction. There is even some antisegregation, whereby faint galaxies cluster more strongly than luminous ones. When early-type galaxies are considered, it is found that luminous ones cluster more strongly than faint ones even after the magnitude correction, that is, the luminosity segregation still exists for early-type galaxies, although the degree of luminosity segregation is slightly reduced after the magnitude correction. Combined with the morphological segregation, these facts are responsible for the absence of luminosity segregation in the total sample.
Hasegawa Takashi
Umemura Masayuki
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