The Dwarf Galaxy Population in Nearby Groups: The Data | Zendy

E. R. Carrasco | Zendy; C. Mendes de Oliveira | Zendy; L. Infante | Zendy

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The Dwarf Galaxy Population in Nearby Groups: The Data

Author(s) -

E. R. Carrasco,

C. Mendes de Oliveira,

L. Infante

Publication year - 2006

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/507447

Subject(s) - physics , astrophysics , surface brightness , dwarf galaxy , astronomy , galaxy , population , photometry (optics) , elliptical galaxy , fundamental plane (elliptical galaxies) , lenticular galaxy , stars , demography , sociology

We used V and I CCD photometry to search for low-surface brightness dwarfgalaxies (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 bythe exponential profile fit, we identified 80 LSBD candidates with magnitudes17 < V < 22 mag and with colors V-I < 1.5 mag at the limiting isophote of 25.8V 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 areextended LSB galaxies that were detected only on smoothed images, after maskingall high surface brightness objects. The completeness in the detection is ~80%for galaxies with V<=20 and 22.5

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