A deep wide survey of faint low surface brightness galaxies in the direction of the Coma cluster of galaxies

C. Adami (1) , R. Scheidegger (2) , M. P. Ulmer (2) , Florence Durret (3, 4) , A. Mazure (1) , Michael J. West (5) , Christopher J. Conselice (6) , M. Gregg (7) , S. Kasun (2) , R. Pello (8) , J.-P. Picat (8)

1 LAM - Laboratoire d'Astrophysique de Marseille
2 Department of Physics and Astronomy, Northwestern University, Evanston
3 IAP - Institut d'Astrophysique de Paris
4 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
5 Department of Physics and Astronomy, University of Hawaii
6 CALTECH - California Institute of Technology, Department of Astronomy
7 Department of Physics, Le Conte Hall, University of California
8 LATT - Laboratoire Astrophysique de Toulouse-Tarbes

Aims.We report on a search for faint (R total magnitude fainter than 21) and low surface brightness galaxies (R central surface brightness fainter than ~24) (fLSBs) in a 0.72 × 0.82 deg² area centered on the Coma cluster.
Methods: .We analyzed deep B and R band CCD imaging obtained using the CFH12K camera at CFHT and found 735 fLSBs. The total B magnitudes, at the Coma cluster redshift, range from -13 to -9 with B central surface brightness as faint as 27 mag arcsec^-2.
Results: .Using empty field comparisons, we show that most of these fLSBs are probably inside the Coma cluster. We present the results of comparing the projected fLSB distributions with the distributions of normal galaxies and with known X-ray over densities. We also investigate their projected distribution relative to their location in the color magnitude relation. Colors of fLSBs vary between B-R˜ 0.8 and ~1.4 for 2/3 of the sample and this part is consistent with the known CMR red-sequence for bright (R

Domaines: Astrophysique [astro-ph]; Planète et Univers [physics]

C. Adami, R. Scheidegger, M. P. Ulmer, Florence Durret, A. Mazure, et al.. A deep wide survey of faint low surface brightness galaxies in the direction of the Coma cluster of galaxies. Astronomy and Astrophysics - A&A, 2006, 459, pp.679-692. ⟨10.1051/0004-6361:20053758⟩. ⟨hal-03732696⟩