Mathematics – Logic
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.9602f&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #96.02; Bulletin of the American Astronomical Society, Vol. 32, p.1570
Mathematics
Logic
Scientific paper
We present the results of a survey of the Leo I group for MR <= -10\ dwarf galaxies. This survey is part of a larger effort to measure the faint-end of the galaxy luminosity function in poor groups to faint limiting magnitudes and surface brightnesses. With the KPNO 0.9m+MOSAIC we have surveyed over 7 square degrees in the Leo I group and over 12 square degrees in the Coma I group. We employ a matched filter technique to robustly detect diffuse dwarf galaxies at a distance of 10 Mpc. Our photometric catalog includes morphological membership selection, guided by a representative sample of follow-up distance measurements from redshifts as well as I-band surface-brightness fluctuations of our most diffuse dwarf candidates. We further quantify our selection effects as a function of total R-band magnitude and central surface brightness with extensive Montecarlo simulations, and fold these weights in to our determination of the faint-end of the galaxy luminosity function. While our method is optimized to find Local-Group-like dwarfs, we also find we are successful at detecting very large LSB dwarfs in the Leo I group --- a type of galaxy first found in Virgo (Impey et al. 1988, ApJ, 330, 634) which seems to be absent from the Local Group.
Bolte Michael
Flint Kathleen
Mendes de Oliveira Claudia
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