An accreting black hole model for Sagittarius A

Details An accreting black hole model for Sagittarius A An accreting black hole model for Sagittarius A

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387l..25m&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 387, March 1, 1992, p. L25-L28. Research supported by Alfred P. S

Astronomy and Astrophysics

Astronomy

174

Accretion Disks, Astronomical Models, Black Holes (Astronomy), Radio Sources (Astronomy), Emission Spectra, Interstellar Gas, Stellar Winds, Wolf-Rayet Stars

Scientific paper

Several observations, notably of broad He I, Br-alpha, and Br-gamma emission lines from the vicinity of IRS 16, indicate the presence of a strong circumnuclear wind near the dynamical center of the Galaxy. Sgr A, a hypothesized supermassive object situated about 0.06 pc to the west of IRS 16, should be accreting from this wind if it is not itself a source of gaseous outflow, for which there is currently no observational evidence. Here, the spectrum and flux of radiation resulting from this process are calculated, and it is shown that they are consistent with the data over at least 12 decades of frequency. Together with the kinematic studies of the stellar and gas distributions in this region, the model argues strongly in favor of Sgr A being a black hole with mass over a million solar masses.

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