M 82's stellar bar

Details M 82's stellar bar M 82's stellar bar

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...383...56g&link_type=abstract

Astronomy and Astrophysics, v.383, p.56-64 (2002)

Astronomy and Astrophysics

Astrophysics

14

Galaxies: Individual: M 82, Galaxies: Structure, Galaxies: Stellar Content

Scientific paper

The fueling of the starburst in M 82 may be related to a stellar bar which pushes gas towards the center where it forms stars. The observation by McKeith et al. (1993) of the near-IR Ca II photospheric absorption line allows a direct velocity measurement of the stars in M 82, and provides by this a confirmation of the predicted x1 and x2-orbits of the bar in M 82. From this and other observations we find that the mass of the x2-orbit stars is ~ 15% of the mass of the bar, and that the mass of the bar of 2x 109 Msun is 20-40% of M 82's mass. This mass concentration of ~ 1 kpc extent at the center of M 82 underlines the dynamic importance of the bar.

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