Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21540803t&link_type=abstract
American Astronomical Society, AAS Meeting #215, #408.03; Bulletin of the American Astronomical Society, Vol. 42, p.232
Other
Scientific paper
We consider how dark matter-dominated ultra-faint Milky Way dwarf spheroidal galaxies fit on galactic scaling relations. In the process, we introduce an alternative to fundamental plane space that relies on the half-light mass in place of velocity dispersion. This space clearly reveals a plane of observables that separates globular clusters from ultrafaint dwarf galaxies. It also reveals a fundamental curve (or "tube") upon which all spheroidal galaxies lie, including the Galactic satellites, dwarf ellipticals, giant ellipticals, and intra-cluster light distributions. This fundamental tube allows us to place dwarf spheroidals in a unified empirical framework that directly connects to all other pressure-supported stellar systems embedded in dark matter halos. We further show that this framework provides a new method for connecting galaxies of all types to their host dark matter halo properties. This approach is consistent with abundance matching, but also complimentary, as it allows probing of dark matter halos over a much wider dynamic range in both mass and luminosity.
Barton Elizabeth J.
Bullock James S.
Kaplinghat Manoj
Tollerud Erik J.
Wolf Jack
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