Infrared imaging of the Galactic center and the search for Sagittarius A*

Details Infrared imaging of the Galactic center and the search for Sagittarius A* Infrared imaging of the Galactic center and the search for Sagittarius A*

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...411l..21h&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 411, no. 1, p. L21-L24.

Astronomy and Astrophysics

Astronomy

24

Black Holes (Astronomy), Galactic Nuclei, Infrared Astronomy, Milky Way Galaxy, Accretion Disks, Point Sources

Scientific paper

High spatial resolution infrared images of the central half parsec of the Galaxy show excess emission in the vicinity of Sgr A* consistent with a point source of K = 14.5 and L-prime = 11.7. No objects brighter than 11th magnitude appear in the M band. The infrared colors of this emission resemble a relatively cool, low luminosity blackbody. Higher temperatures are permitted if the extinction to Sgr A* is considerably greater than elsewhere in the region. Other energy mechanisms producing a spectrum flatter than F(nu) about nu-squared appear unlikely. These results are marginally consistent with the report of a K about 13.7 object at the location of Sgr A*, implying the source may be variable.

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