Tidal Effects In The Ultrafaint Dwarf Satellite Galaxies Of The Milky Way.

Details Tidal Effects In The Ultrafaint Dwarf Satellite Galaxies Of The Milky Way. Tidal Effects In The Ultrafaint Dwarf Satellite Galaxies Of The Milky Way.

Apr 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011dda....42.0703m&link_type=abstract

American Astronomical Society, DDA meeting #42, #7.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Galaxies obey a scaling relation between luminosity and circular velocity called the Tully-Fisher relation. This relation is uniform with little scatter over five decades in mass. The brightest dwarf spheroidal satellites of the Milky Way fall along the extrapolation of this relation, but the more recently discovered ultrafaint dwarfs do not. The small size and proximity of these objects suggests a possible role for tidal effects in causing their deviation from the Tully-Fisher relation.
This work is supported in part by NSF grant AST0908370.

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