Structure and kinematics of neutral hydrogen gas in the Large Magellanic Cloud

Details Structure and kinematics of neutral hydrogen gas in the Large Magellanic Cloud Structure and kinematics of neutral hydrogen gas in the Large Magellanic Cloud

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...263...41l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 263, no. 1-2, p. 41-53.

Astronomy and Astrophysics

Astrophysics

137

Galactic Structure, Hydrogen, Interstellar Gas, Magellanic Clouds, Emission Spectra, Kinematics, Line Spectra, Radial Velocity, Spatial Distribution, Starburst Galaxies

Scientific paper

An extension of the 1982 21 cm line survey of the LMC has been used to find that a gas disk containing 72 percent of the H I gas extends over all of the LMC and that an L-component at lower radial velocities contains 19 percent of the H I gas. The kinematics of the disk can be modeled by a flat disk in differential rotation without a large-scale warp. The rotation curve is symmetric with no obvious influence of the bar. The starburst region 30 Dor seems to be situated in the L-component. By estimating its ionizing action in a quantitative way, it can be shown that there is a lower limit of 250-400 pc for the distance of 30 Dor above the LMC disk.

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