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For refcode 1998AJ....116.2287A:
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1998AJ....116.2287A A SURVEY FOR LOW SURFACE BRIGHTNESS GALAXIES AROUND M31. I. THE NEWLY DISCOVERED DWARF ANDROMEDA V TAFT E. ARMANDROFF, JAMES E. DAVIES, AND GEORGE H. JACOBY Kitt Peak National Observatory, National Optical Astronomy Observatories,3 P.O. Box 26732, Tucson, AZ 85726; armand@noao.edu, jacoby@noao.edu Received 1998 June 24 ABSTRACT We present images and a color-magnitude diagram for And V, a new dwarf spheroidal companion to M31 that was found using a digital filtering technique applied to 1550 deg^2^ of the second Palomar Sky Survey. And V resolves into stars easily in follow-up 4 m V- and I-band images, from which we deduce a distance of 810 +/- 45 kpc using the tip of the red giant branch method. Within the uncertainties, this distance is identical to the Population II distances for M31 and, combined with a projected separation of 112 kpc, provides strong support for a physical association between the two galaxies. There is no emission from And V detected in H{alpha}, 1.4 GHz radio continuum, or IRAS bandpasses, and there is no young population seen in the color-magnitude diagram that might suggest that And V is an irregular. Thus, the classification as a new dwarf spheroidal member of the Local Group seems secure. With an extinction-corrected central surface brightness of 25.2 V mag arcsec^-2^, a mean metal abundance of [Fe/H] ~ - 1.5, and no evidence for upper asymptotic giant branch stars, And V resembles And I and III. Key words: galaxies: dwarf-galaxies: individual (Andromeda V, M31) - galaxies: stellar content-galaxies: structure-Local Group-surveys- techniques: image processing
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