Kinematics of the stars in the starburst nucleus of M82: just another normal stellar bulge?

Details Kinematics of the stars in the starburst nucleus of M82: just another normal stellar bulge? Kinematics of the stars in the starburst nucleus of M82: just another normal stellar bulge?

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993rmxaa..27..137g&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica, Vol. 27, p. 137 - 140

Astronomy and Astrophysics

Astronomy

Galactic Nuclei: Starbursts, Galactic Nuclei: Kinematics, Galactic Nuclei: Stellar Content

Scientific paper

Using the sharp edge of the (2-0)12CO stellar absorption bandhead, the authors have measured the velocity dispersion from the central 5″of the starburst galaxy M82. Using both minimum least squares fitting and maximum entropy deconvolution they have derived a velocity dispersion for the central r < 7.5 pc of 100 km/s. The mass-to-light ratio this implies is more than 10 times higher than in the surrounding regions of the galaxy, and is comparable to the same spatial region in our own galaxy. This implies that the starlight from the near-infrared-bright nucleus is dominated by an older population of giants and not by supergiants formed in the starburst.

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