Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290..415l&link_type=abstract
In ESA, Infrared Spectroscopy in Astronomy p 415-418 (SEE N90-19084 11-89)
Astronomy and Astrophysics
Astronomy
Black Holes (Astronomy), Galactic Nuclei, Infrared Spectroscopy, Milky Way Galaxy, Galactic Mass, Galactic Radiation, Infrared Spectra, Mass Distribution
Scientific paper
Infrared spectroscopic observations of the Galactic center and their interpretation are discussed. Special attention is given to attempts to determine whether a massive black hole is present. The mass distribution, through observations of the gas and stellar kinematics, is analyzed. It is pointed out that gas motions indicate the existence of a central object of mass equal to a 3,000,000th of the solar mass. The interpretations of such observations are discussed. The radiation field which excites the gas and the types of stars present is studied. The radiation field may provide evidence to support or deny the dynamical indication of a central black hole, but the evidence is at present ambiguous. It is not yet possible to determine whether a massive black hole exists at the Galactic center. Observations which may resolve the question are discussed.
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