A Survey for Low Surface Brightness Dwarf Galaxies Around M31

Details A Survey for Low Surface Brightness Dwarf Galaxies Around M31 A Survey for Low Surface Brightness Dwarf Galaxies Around M31

1998-10-20

arxiv.org/abs/astro-ph/9810299v1

in "The Low Surface Brightness Universe", IAU Colloquium 171, page 111 (1999)

Astronomy and Astrophysics

Astrophysics

To be published in "The Low Surface Brightness Universe", Proceedings of IAU Colloquium 171, edited by J. I. Davies, C. Impey,

Scientific paper

By applying a digital filtering technique to 1550 square degrees of the POSS-II in the vicinity of M31, we found two previously unidentified very low surface brightness dwarf galaxies which we designate And V and VI. Follow-up imaging with the KPNO 4-m telescope resolved these into stars easily. The V- and I- band images of And V indicate a distance similar to that of M31, and <[Fe/H]> approximately -1.5. All evidence strongly supports its classification as a dwarf spheroidal companion to M31. Data for And VI are being analyzed, but preliminary indications support a similar conclusion. Our search for more dwarfs, including follow-up observations of numerous candidates found via digital filtering, is incomplete; thus, further identifications may be forthcoming.

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