Dwarf galaxies in the nearby Lynx-Cancer void: photometry, colours and ages

Details Dwarf galaxies in the nearby Lynx-Cancer void: photometry, colours and ages Dwarf galaxies in the nearby Lynx-Cancer void: photometry, colours and ages

2010-11-15

arxiv.org/abs/1011.3430v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 4 figures. To appear in proceedings of 'Dwarf Galaxies: Keys to Galaxy Formation and Evolution' (Lisbon, September 20

Scientific paper

The nearby Lynx-Cancer void is a good laboratory to study the effect of very rarefied environment on the evolution of the least massive dwarf galaxies. A recently compiled sample of this void's galaxies includes about one hundred objects with M_B in the range -12 to -18 mag. Good quality images are available in the SDSS database for ~80% of the sample. Their u,g,r,i,z photometry allows one to derive galaxy stellar mass (and, incorporating HI data, gas mass-fraction) and ages of visible stellar populations, and hence, the epoch of their formation (first SF episode). We present the first photometric results of the ongoing study of the Lynx-Cancer void.

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