The mass-to-light ratio in spiral galaxies

Details The mass-to-light ratio in spiral galaxies The mass-to-light ratio in spiral galaxies

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26as...92..583f&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 92, no. 3, Feb. 1992, p. 583-604.

Astronomy and Astrophysics

Astronomy

18

Galactic Mass, Galactic Rotation, Mass To Light Ratios, Sky Surveys (Astronomy), Spiral Galaxies, Astronomical Photometry, Dark Matter, Gravitational Fields, H I Regions, Metallicity

Scientific paper

The galactocentric variation of the dynamical mass-to-light ratio for a large sample of field and Hickson compact group spirals has been examined in a systematic way. The majority of galaxies in this sample do not have a constant M/LR, but rather one that increases with radius. The gradient in M/LR between 0.2 and 0.6 R25 is correlated with total luminosity, in that faint galaxies have a higher proportion of dark matter at large radii. The absolute value of M/LR at 0.5 R25 is consistent with early type spirals having more dark matter. Higher metallicity gas is found in galaxies with a deeper gravitational potential.

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