Issue |
A&A
Volume 486, Number 3, August II 2008
|
|
---|---|---|
Page(s) | 755 - 761 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361:20078806 | |
Published online | 04 June 2008 |
Star-forming galaxies in low-redshift clusters: data and integrated galaxy properties*
1
Astrophysics Research Institute, Liverpool John Moores University, Birkenhead CH41 1LD, UK e-mail: cft@astro.livjm.ac.uk
2
Royal Observatory, Greenwich, London SE10 9NF, UK
3
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK
4
School of Physics and Astronomy, The University of Nottingham, University Park, Nottingham NG7 2RD, UK
5
Department of Astronomy, University of Virginia, Charlottesville, VA 22903, USA
Received:
7
October
2007
Accepted:
23
April
2008
Aims. This paper is a continuation of an ongoing study of the evolutionary processes affecting cluster galaxies.
Methods. Both CCD R band and Hα narrow-band imaging was used to determine photometric parameters (mr, r24, Hα flux, and equivalent width) and derive star formation rates for 227 CGCG galaxies in 8 low-redshift clusters. The galaxy sample is a subset of CGCG galaxies in an objective prism survey (OPS) of cluster galaxies for Hα emission.
Results. It is found that detection of
emission-line galaxies in the OPS is 85%, 70%, and 50% complete at
the mean surface brightness values of 1.25 10-19,
5.19
10-20, and 1.76
10-20 W m-2 arcsec-2, respectively, measured within the R band isophote of 24 mag arcsec-2 for the galaxy.
Conclusions. The CCD data, together with matched data from a recent Hα galaxy survey of UGC galaxies within v ≤ 3000 km s-1, will be used for a comparative study of R band and Hα surface photometry between cluster and field spirals.
Key words: galaxies: clusters: general / galaxies: evolution / galaxies: interactions
© ESO, 2008
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