The galaxy luminosity function and the morphological type

Details The galaxy luminosity function and the morphological type The galaxy luminosity function and the morphological type

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...332...89m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 332, Sept. 1, 1988, p. 89-95. Research supported by the Universidad de Cant

Mathematics

8

Astronomical Photometry, Galactic Clusters, Galactic Radiation, Galactic Structure, Luminosity, Correlation, Dark Matter, Mass Distribution, Matrices (Mathematics)

Scientific paper

The morphological luminosity function is obtained assuming that galaxies form only at high-density regions with the matter distribution represented by a filtered Gaussian random field. The results obtained for cold dark matter spectra (adiabatic and isocurvature fluctuations) with Omega = 1 are compared with observations for galaxies of different Hubble types, finding that both scenarios provide distributions that are close to the observations for global thresholds between the values of 2.5 and 3 and standard mass-luminosity ratios for each type. In every case, a bell-shaped luminosity function was found, which looks similar for each morphological type but differing in the mean luminosity.

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