Large-scale distribution of neutral hydrogen in the Galaxy

Details Large-scale distribution of neutral hydrogen in the Galaxy Large-scale distribution of neutral hydrogen in the Galaxy

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986velen......126p&link_type=abstract

Leningradskii Universitet, Vestnik, Matematika, Mekhanika, Astronomiia (ISSN 0024-0850), Jan. 1986, p. 126-130. In Russian.

Astronomy and Astrophysics

Astronomy

Astronomical Models, Hydrogen Clouds, Milky Way Galaxy, Neutral Gases, Spatial Distribution, Spiral Galaxies, Centimeter Waves, Galactic Structure, Least Squares Method, Line Shape, Line Spectra

Scientific paper

The observed intensity of the 21-cm neutral hydrogen line in the galactic plane is modeled, with a longitudinal interval of 2 deg, by a two-arm logarithmic spiral. A purely circular motion of hydrogen clouds is assumed, in accordance with a rotation curve obtained previously along the entire profile of the 21-cm line. The spiral parameters are determined using the least squares method. A twist angle of 5-8 deg is obtained for the internal (with respect to the sun) region.

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