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A Survey for Low Surface Brightness Dwarf Galaxies Around M31

Published online by Cambridge University Press:  12 April 2016

Taft E. Armandroff ,
James E. Davies  and
George H. Jacoby
Taft E. Armandroff
Affiliation:
Kitt Peak National Observatory, National Optical Astronomy Observatories,1P.O. Box 26732, Tucson, AZ 85726
James E. Davies
Affiliation:
Department of Astronomy, University of Wisconsin, Madison, WI 53706
George H. Jacoby
Affiliation:
Kitt Peak National Observatory, National Optical Astronomy Observatories,1P.O. Box 26732, Tucson, AZ 85726

Abstract

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By applying a digital filtering technique to 1550 deg2 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]> ~ −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.

Type
Low Surface Brightness galaxy surveys
Information
International Astronomical Union Colloquium , Volume 171: The Low Surface Brightness Universe , 1999 , pp. 111 - 119
Copyright
Copyright © Astronomical Society of the Pacific 1999

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