Constraints on the Near-Infrared Emission from Sgr A* Based on NICMOS Observations

Details Constraints on the Near-Infrared Emission from Sgr A* Based on NICMOS Observations Constraints on the Near-Infrared Emission from Sgr A* Based on NICMOS Observations

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.8707s&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #87.07; Bulletin of the American Astronomical Society, Vol. 33, p.915

Astronomy and Astrophysics

Astronomy

Scientific paper

Observations of the central arcsecond of the Galaxy at near infrared wavelengths reveal a tight stellar cluster, however, no clear point source exactly coincident with the black hole candidate Sgr A* has been detected. Taking advantage of the stability of the point-spread function (PSF) acheived by HST/NICMOS observations, the contaminating emission from the stellar cluster can be eliminated by PSF subtraction techniques. Limits on the maximum flux emanating from a point source coincident with Sgr A* at 1.1, 1.45, 1.6, 1.9, and 2.2 microns based on NICMOS observations are presented. The resulting extinction-corrected fluxes are compared to accretion disk models for the spectrum of Sgr A*.

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