A new limit on the nature of the galactic missing mass

Details A new limit on the nature of the galactic missing mass A new limit on the nature of the galactic missing mass

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.306..669g&link_type=abstract

Nature (ISSN 0028-0836), vol. 306, Dec. 15, 1983, p. 669, 670.

Astronomy and Astrophysics

Astrophysics

20

Milky Way Galaxy, Missing Mass (Astrophysics), Spiral Galaxies, Stellar Mass, Dwarf Stars, M Stars, Mass To Light Ratios, Stellar Luminosity

Scientific paper

It has been widely accepted that large amounts of "missing" mass must be present in spiral galaxies to explain both the small-scale and large-scale kinematic observations. The small-scale data refer to the volume within a few hundred parsecs of the Sun, and indicate that 25 - 50% of the gravitating mass has no detected luminous counterpart. The large-scale data (velocity dispersions and rotation curves) show that this non-luminous component becomes increasingly important with increasing galactocentric distance, and is the dominant mass in the outer regions of galaxies. The authors present new observational results which show that low-luminosity M dwarfs are unlikely to provide the large-scale missing mass, and cannot provide the small-scale missing mass.

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