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The Nucleus of Our Home Galaxy: A Remnant of an Active or a Starburst Galaxy?

Published online by Cambridge University Press:  19 July 2016

Leonid M. Ozernoy
Leonid M. Ozernoy*
Affiliation:
Institute for Computational Sciences and Informatics George Mason U., Fairfax, VA 22030-4444, USA Lab. for Astronomy and Solar Physics, NASA/GSFC Greenbelt, MD 20771, USA e-mail: ozernoy@hubble.gmu.edu

Abstract

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To resolve the above dilemma, two essentially different approaches are undertaken: First, a new, detailed analysis of the entire radiation spectrum of Sgr A∗, from radio band up to gamma-rays, is reviewed, which enables us to put substantial constraints on the mass of a putative black hole. The derived upper limit turns out to be too small to allow the black hole to serve as an ‘engine’ for a Seyfert galaxy. Second, analyses of recent data on the 10 KeV gas in the central 200 pc and on star formation history at the Galactic center both make a star burst the likely episode in a recent past. Taken together, the two approaches seem to indicate that the history of the central part of our Galaxy can be better described as that of a starburst, rather than a Seyfert, galaxy.

Keywords

The Milky Way galaxySgr A∗Sgr A WestIRS 16starburst galaxies
Type
Poster Contributions: Emission Processes
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 351 - 354
Copyright
Copyright © Kluwer 1994 

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