Galactic center gasdynamics - A one-armed spiral in a Keplerian disk

Details Galactic center gasdynamics - A one-armed spiral in a Keplerian disk Galactic center gasdynamics - A one-armed spiral in a Keplerian disk

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...380l..71l&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 380, Oct. 20, 1991, p. L71-L74. Research supported by NSF and Tex

Astronomy and Astrophysics

Astrophysics

103

Galactic Nuclei, Gas Dynamics, Milky Way Galaxy, Emission Spectra, Infrared Spectra, Ionized Gases, Mass Distribution

Scientific paper

The inner 3 x 4 pc of the Galaxy have been imaged in the (Ne II) (12.8-micron) line with 2 arcsec and 30 km/s resolution. The morphology of much of the ionized gas can be explained by a one-armed linear spiral. The kinematics of the gas along the spiral can be modeled by approximately circular orbits with a nearly Keplerian rotation curve, requiring a central mass of 2 +/- 0.5 x 10 exp 6 solar mass. Several possible origins are suggested for the spiral.

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