Carbon star radial velocities and dark matter in the universe

Details Carbon star radial velocities and dark matter in the universe Carbon star radial velocities and dark matter in the universe

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91..539j&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, March 1986, p. 539, 540. NASA-NSF-supported research.

Astronomy and Astrophysics

Astrophysics

8

Carbon Stars, Milky Way Galaxy, Missing Mass (Astrophysics), Radial Velocity, Universe, Carbon Monoxide, Dwarf Galaxies, K Stars, Stellar Envelopes

Scientific paper

Optical radial velocities of carbon stars in the Milky Way are compared to center-of-mass velocities derived from CO radio emission produced in their circumstellar envelopes. It seems that there is an intrinsic velocity dispersion in the optically measured radial velocities. If the carbon stars in the dwarf spheroidals behave in a fashion similar to those in the Milky Way, then the use of their optical radial velocities to infer the mass-to-light ratio of dwarf spheroidal galaxies and the nature of the dark matter in the universe is suspect. Measurement of the radial velocities of K giants may possibly avoid these uncertainties associated with atmospheric motions.

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