Dwarf spheroidal galaxies and resonant orbital coupling

Details Dwarf spheroidal galaxies and resonant orbital coupling Dwarf spheroidal galaxies and resonant orbital coupling

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...341l..41k&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 341, June 15, 1989, p. L41-L45. Research supported by the Alfred

Astronomy and Astrophysics

Astronomy

80

Dwarf Galaxies, Local Group (Astronomy), Orbital Resonances (Celestial Mechanics), Galactic Structure, Milky Way Galaxy, Stellar Systems

Scientific paper

The structural properties of the dwarf spheroidal satellite galaxies of the Milky Way may be strongly affected by their time-dependent interactions with the 'tidal' field of the Milky Way. A low Q resonance of the tidal driving force with collective oscillation modes of the dwarf system can produce many of the observed properties of the Local Group dwarf spheroidal galaxies, including large velocity dispersions that would normally be interpreted as indicating large dynamical masses.

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