On the mass-to-light ratios of dwarf spheroidal galaxies

Details On the mass-to-light ratios of dwarf spheroidal galaxies On the mass-to-light ratios of dwarf spheroidal galaxies

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.244...64c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 244, May 1, 1990, p. 64-67. Research supported by SERC.

Astronomy and Astrophysics

Astronomy

11

Dwarf Galaxies, Galactic Structure, Mass To Light Ratios, Dark Matter, Galactic Mass, Milky Way Galaxy

Scientific paper

Previous estimates of the mass-to-light ratios of local dwarf spheroidal galaxies have indicated that they form an inhomogeneous population. Here, a tidal equation is used to show that, assuming that all of these dwarf galaxies are on essentially similar orbits around the Milky Way (rather than having perigalactica comparable with their present distances), it is possible to derive values of M/Lv which have a much smaller spread and no longer have correlations with luminosity and distance. It is then possible to maintain the view that either all of these dwarf galaxies contain dark matter or none of them do, with the main determining factor being the currently uncertain mass of the Milky way.

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