The Dwarf Galaxy Population in Nearby Groups. The data

Details The Dwarf Galaxy Population in Nearby Groups. The data The Dwarf Galaxy Population in Nearby Groups. The data

2006-06-07

arxiv.org/abs/astro-ph/0606165v1

Astron.J.132:1796-1817,2006

Astronomy and Astrophysics

Astrophysics

23 pages, 13 figures, 6 inserted tables using emulateapj.cls style; revision of previously submitted AJ paper

Scientific paper

10.1086/507447

We used V and I CCD photometry to search for low-surface brightness dwarf galaxies (LSBD) in the central (<0.5 h^-1 Mpc) region of the groups NGC 6868, NGC 5846, HCG 42 and the poor cluster IC 4765. Using the parameters given by the exponential profile fit, we identified 80 LSBD candidates with magnitudes 17 < V < 22 mag and with colors V-I < 1.5 mag at the limiting isophote of 25.8 V mag/arcsec^2. The galaxies have mu0 > 22.5 V mag/arcsec^2, h > 1.5 arcsec, and diameters larger than 1.2 h^-1 kpc. Twenty of the eighty galaxies are extended LSB galaxies that were detected only on smoothed images, after masking all high surface brightness objects. The completeness in the detection is ~80% for galaxies with V<=20 and 22.5

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