Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983afz....19..761k&link_type=abstract
(Astrofizika, vol. 19, Oct.-Dec. 1983, p. 761-777) Astrophysics (ISSN 0571-7132), vol. 19, no. 4, April 1984, p. 431-440. Transl
Astronomy and Astrophysics
Astrophysics
7
Astrometry, Astronomical Spectroscopy, Hydroxyl Radicals, Interstellar Matter, Molecular Clouds, Absorption Spectra, Distance, Galactic Rotation, Kinematics, Radial Velocity
Scientific paper
An attempt is made to determine distances to interstellar clouds by a method free of the limitations of the conventional method (using the galactic rotation curve). It is shown that the term delta, given by the square root of the ratio of the half width of the OH absorption lines to the antenna temperature, varies linearly with the distance R to the absorbing clouds. The slope of the straight line delta(R) depends on the width of the directional diagram of the radio telescope. An interpretation of the dependence is proposed. Examples are given of the use of delta(R) to determine the distances and kinematic method, the dependence delta(R) makes it possible to obtain unambiguous distances to interstellar clouds that are undistorted by peculiar motions.
Iurevich L. V.
Kolesnik Igor G.
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