Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....93..106b&link_type=abstract
Astronomy and Astrophysics, vol. 93, no. 1-2, Jan. 1981, p. 106-112. Research supported by the Nederlandse Organisatie voor Zui
Astronomy and Astrophysics
Astrophysics
63
Galactic Rotation, Galactic Structure, Hydrogen Clouds, Radial Velocity, Spiral Galaxies, Astronomical Maps, Mass Transfer, Velocity Distribution
Scientific paper
The radio velocity field of the spiral galaxy M101 has been derived from the 21-cm line observations of the Westerbork Synthesis Radio Telescope. The galaxy can be divided into a kinematically well-behaved inner part and a distorted outer part; a rotation curve was derived for the inner part, and weak evidence exists for the presence of systematic motions associated with the spiral structure. Determination of the mass distribution in the outer region of the galaxy indicates that not all the material is located in the main plane of the galaxy, but it is difficult to infer a distribution of matter consistent with the observed radial velocity field.
Allen Rosalind J.
Bosma Albert
Goss William Miller
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