Gas as a Tracer of the Galactic Potential

Details Gas as a Tracer of the Galactic Potential Gas as a Tracer of the Galactic Potential

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ap%26ss.289..239k&link_type=abstract

Astrophysics and Space Science, v. 289, Issue 3, p. 239-242 (2004).

Astronomy and Astrophysics

Astrophysics

3

Milky Way, Ism, Gravitational Potential

Scientific paper

We consider a disk-like dark matter model for the Milky Way andcompare a few predictions with observations. The observed gaseousflaring for HI and molecular gas fits the model predictions indetail. The global HI distribution in the Milky Way needs to beexplained by a multiphase medium. The dark matter distribution in theGalactic halo is traced by a low density component of halogas. High-velocity clouds with distances up to ˜ 50 kpc may beexplained as condensations which originate from instabilities withinthe gaseous halo. Our model explains also ‘beards’ and ‘forbiddenvelocities’ as observed in the rotation curves of externalgalaxies. A disk-like dark matter model is self-consistent and inexcellent agreement with observations.

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