Journal Article

Using an assumption about the monotony of spiral arms to determine the orientation angles of galaxies

A. M. Fridman and S. G. Poltorak

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 403, issue 3, pages 1625-1632
Published in print April 2010 | ISSN: 0035-8711
Published online April 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.16229.x
Using an assumption about the monotony of spiral arms to determine the orientation angles of galaxies

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A method is proposed for the determination of the position and inclination angles of the plane of a spiral galaxy based on the assumption that every spiral arm is a monotonic function of the radius against azimuthal angle. This method may yield more accurate results than the more commonly employed isophote method, which is subject to a number of drawbacks. Analytical study, calibration against other methods and examples of application of the proposed method to real galaxies are presented.

Keywords: galaxies: spiral

Journal Article.  4903 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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