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7.10. Confirmation of a MIR source near Sgr A∗

Published online by Cambridge University Press:  25 May 2016

A. S. Cotera ,
M. W. Werner  and
P. P. Plavchan
A. S. Cotera
Affiliation:
Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Dr. Pasadena, CA 91109-8099
M. W. Werner
Affiliation:
Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Dr. Pasadena, CA 91109-8099
P. P. Plavchan
Affiliation:
Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Dr. Pasadena, CA 91109-8099

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The nature of the nonthermal source Sgr A∗ has been the subject of extensive debate, with evidence mounting that it is in fact a ~ 2 × 106 M⊙ black hole (e.g. Eckart & Genzel 1997). Although previous Mid-Infrared (MIR, ~5-40 μm) observations (Gezari 1992; Telesco, Davidson & Werner 1996) have estabished upper limits on the flux of a potential source at Sgr A∗, they were unable to differentiate a point source at the location of Sgr A∗ from the background. Stolovy et al. (1996) reported the first detection of a compact source coincident with Sgr A∗ to ±0.3″, which they measured to have a flux value of 25±5 mJy. The existence of this source, and a better understanding of its flux and spectral characteristics are needed. We present here confirmation of a MIR source near Sgr A∗.

Type
Part II. Nuclear Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 311 - 312
Copyright
Copyright © Kluwer 1998 

References

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