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Mini-Spiral at the Galactic Center: A Link between its Structure and the Value of a Central Point Mass

Published online by Cambridge University Press:  25 May 2016

A.M. Fridman ,
O.V. Khoruzhii ,
V.V. Lyakhovich ,
L. Ozernoy  and
L. Blitz
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
L. Ozernoy
Affiliation:
Inst. for Computational Sciences and Informatics & Dept. of Physics, George Mason U., Fairfax, VA 22030-4444, USA
L. Blitz
Affiliation:
Department of Astronomy, University of Maryland, College Park, MD 20742, USA

Extract

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The innermost 2 pc contain a rotating ring (“circumnuclear disk”) of molecular gas, neutral hydrogen, and dust with an embedded H II region called Sgr A West; a dense stellar cluster; and a compact nonthermal radio source Sgr A∗ (for a recent review, see Blitz et al. 1993). The clumped, spiral-shaped morphology of Sgr A West, sometimes called lthe mini-spiral”, has been a subject of numerous speculations concerning its origin (for a review, see Genzel & Townes 1987). Lacy et al. (1991) demonstrated that both the kinematics and shape of a part of Sgr A West can be fairly well approximated using an one-armed density-wave model.

Type
Chapter 3: What is the Nature of the Center of the Galaxy?
Information
Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 241 - 246
Copyright
Copyright © Kluwer 1996 

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