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Are there Giant Vortices near Solar Circle?

Published online by Cambridge University Press:  25 May 2016

A.M. Fridman ,
O.V. Khoruzhii ,
V.V. Lyakhovich  and
V.S. Avedisova
A.M. Fridman
Affiliation:
Institute of Astronomy, Russian Academy of Sciences 48 Pyatnitskaya St., Moscow, 109017, Russia
O.V. Khoruzhii
Affiliation:
Institute of Astronomy, Russian Academy of Sciences 48 Pyatnitskaya St., Moscow, 109017, Russia
V.V. Lyakhovich
Affiliation:
Institute of Astronomy, Russian Academy of Sciences 48 Pyatnitskaya St., Moscow, 109017, Russia
V.S. Avedisova
Affiliation:
Institute of Astronomy, Russian Academy of Sciences 48 Pyatnitskaya St., Moscow, 109017, Russia

Abstract

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The analysis of the observational line-of-sight radial velocity field of molecular clouds, connecting with young stars, has strengthened the Fridman's hypothesis (1994) on the possible existence of anticyclone in the solar neighborhood. Anticyclones are located near corotation radius of the observed spiral arms, a number of which is equal to a number of vortices. Our calculations show that the four-vortices model fits observational data fairly well.

We shall not use any theoretical conception on the nature of spiral arms generation (bar, selfgravitational or hydrodynamical mechanisms, etc.). We shall base on the treatment of the observational data.

Type
Chapter 7: How are we to Understand the Small Scale Structure of the ISM?
Information
Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 597 - 604
Copyright
Copyright © Kluwer 1996 

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