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Luminosity function of clusters of galaxies

Paolillo, M. and Andreon, S. and Longo, G. and Puddu, E. and Gal, R. R. and Scaramella, R. and Djorgovski, S. G. and de Carvalho, R. R. (2001) Luminosity function of clusters of galaxies. Astronomy & Astrophysics, 367 (1). pp. 59-71. ISSN 0004-6361. doi:10.1051/0004-6361:20000442.

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The composite galaxy luminosity function (hereafter LF) of 39 Abell clusters of galaxies is derived by computing the statistical excess of galaxy counts in the cluster direction with respect to control fields. Due to the wide field coverage of the digitised POSS-II plates, we can measure field counts around each cluster in a fully homogeneous way. Furthermore, the availability of virtually unlimited sky coverage allows us to directly compute the LF errors without having to rely on the estimated variance of the background. The wide field coverage also allows us to derive the LF of the whole cluster, including galaxies located in the cluster outskirts. The global composite LF has a slope α ~ -1.1 ± 0.2 with minor variations from blue to red filters, and M* ~ -21.7, -22.2, -22.4 mag (H_0 = 50 km s^(-1) Mpc^(-1)) in g, r and i filters, respectively (errors are detailed in the text). These results are in quite good agreement with several previous determinations and in particular with the LF determined for the inner region of a largely overlapping set of clusters, but derived making use of a completely different method for background subtraction. The similarity of the two LFs suggests the existence of minor differences between the LF in the cluster outskirts and in the central region, or a negligible contribution of galaxies in the cluster outskirts to the global LF.

Item Type:Article
Related URLs:
URLURL TypeDescription
Paolillo, M.0000-0003-4210-7693
Longo, G.0000-0002-9182-8414
Djorgovski, S. G.0000-0002-0603-3087
de Carvalho, R. R.0000-0002-1283-3363
Additional Information:© 2001 ESO. Article published by EDP Sciences. Received 20 September 2000; Accepted 5 December 2000; Published online 15 February 2001. Bianca Garilli, Dario Bottini and Dario Maccagni are warmly thanked for providing us with the electronic access to the data shown in Fig. 3 of Garilli et al. (1996). We also thank M. Fukugita for providing us k-correction data and N. Trentham for the information about the photometry in his articles. The work on production and cataloguing of DPOSS at Caltech was supported by a generous grant from The Norris Foundation. R. Gal acknowledges a partial support from a NASA Graduate Fellowship. We are also thankful to the POSS-II and DPOSS teams for their efforts.
Funding AgencyGrant Number
Kenneth T. and Eileen L. Norris FoundationUNSPECIFIED
NASA Graduate Student Research FellowshipUNSPECIFIED
Subject Keywords:galaxies: clusters: general - galaxies: luminosity function - galaxies: evolution
Issue or Number:1
Record Number:CaltechAUTHORS:20180306-111017080
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Official Citation:Luminosity function of clusters of galaxies. M. Paolillo, S. Andreon, G. Longo, E. Puddu, R. R. Gal, R. Scaramella, S. G. Djorgovski and R. de Carvalho. A&A, 367 1 (2001) 59-71. DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85136
Deposited By: Tony Diaz
Deposited On:06 Mar 2018 22:00
Last Modified:15 Nov 2021 20:25

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