Tidal Disruptions of the Ursa Minor and Draco Dwarf Spheroidal Galaxies

Details Tidal Disruptions of the Ursa Minor and Draco Dwarf Spheroidal Galaxies Tidal Disruptions of the Ursa Minor and Draco Dwarf Spheroidal Galaxies

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.3004k&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #30.04; Bulletin of the American Astronomical Society, Vol. 32, p.1446

Astronomy and Astrophysics

Astronomy

3

Scientific paper

Several of the local group dwarf spheroidal (dS) galaxies show evidence of inflated velocity dispersions. A likely model for Ursa Minor, Carina, and Draco is that their tidal interaction with the Milky Way has pushed them far from virial equilibrium. We have obtained wide-field V and I band photometry of the Ursa Minor and Draco dS galaxies using the 12K CCD mosaic detector on the Canada-France-Hawaii telescope. We present here the results of a sensitive search for extratidal stars out to distances of 4 degrees from the centers of these galaxies. We discuss the implications of these results for dark matter and Milky Way tidal interaction models.

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