The r'-band luminosity function of Abell1367: a comparison with Coma

Details The r'-band luminosity function of Abell1367: a comparison with Coma The r'-band luminosity function of Abell1367: a comparison with Coma

2002-10-29

arxiv.org/abs/astro-ph/0210616v1

Astron.Astrophys. 397 (2003) 421-430

Astronomy and Astrophysics

Astrophysics

12 pages, 8 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20021553

We made a large (approximately 1degr x 1degr) r'-band imaging survey of the central regions of the two nearby clusters of galaxies, Abell1367 and Coma. The data, presented as a catalog, are used to construct the r'-band luminosity function (LF) of galaxies in these two clusters, by subtracting the Yasuda et al. (2001) galaxy counts from our cluster counts. Our Coma luminosity function is consistent with previous determinations, i.e. providing a faint end slope alpha = -1.47_-0.09^+0.08, significantly steeper than the one we find for Abell1367 (alpha = -1.07_-0.16^+0.20). The counts in Abell1367 show a relative minimum at r' ~ 19, followed by a steep increase faintward. The difference between the two clusters appears significant, given the consistency of the experimental conditions in the two clusters. Whereas for Coma we find a significant increase of the slope of the LF outwards, no such effect is found for Abell1367.

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