On the galaxy luminosity function in the central regions of the Coma cluster

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dc.creatorBiviano, A.
dc.creatorDurret, F.
dc.creatorGerbal, D.
dc.creatorFèvre, O. Le
dc.creatorLobo, C.
dc.creatorMazure, A.
dc.creatorSlezak, E.
dc.date1994-11-07
dc.date.accessioned2026-07-07T02:19:32Z
dc.date.available2026-07-07T02:19:32Z
dc.descriptionWe have obtained new redshifts for 265 objects in the central 48~$\times$~25~arcmin$^2$ region of the Coma cluster. When supplemented with literature data, our redshift sample is 95~\% complete up to a magnitude b$_{26.5}$=18.0 (the magnitudes are taken from the photometric sample of Godwin et al. 1983). Using redshift-confirmed membership for 205 galaxies, and the location in the colour-magnitude diagram for another 91 galaxies, we have built a sample of cluster members which is complete up to b$_{26.5}$=20.0. We show that the Coma cluster luminosity function cannot be adequately fitted by a single Schechter (1976) function, because of a dip in the magnitude distribution at b$_{26.5}$$\sim$17. The superposition of an Erlang (or a Gauss) and a Schechter function provides a significantly better fit. We compare the luminosity function of Coma to those of other clusters, and of the field. Luminosity functions for rich clusters look similar, with a maximum at $M_{b} \simeq -19.5 + 5 \times \log h_{50}$, while the Virgo and the field luminosity functions show a nearly monotonic behaviour. These differences may be produced by physical processes related to the environment which affect the luminosities of a certain class of cluster galaxies.
dc.description7 pages, uuencoded postscript file (figures included) Accepted for publication on A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/9411025
dc.identifierhttp://arxiv.org/abs/astro-ph/9411025
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/9903
dc.subjectAstrophysics
dc.titleOn the galaxy luminosity function in the central regions of the Coma cluster
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