A Thermal Detection of Sgr A* ?

Details A Thermal Detection of Sgr A* ? A Thermal Detection of Sgr A* ?

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sao..conf..286c&link_type=abstract

Science with Adaptive Optics, Proceedings of the ESO Workshop Held at Garching, Germany, 16-19 September 2003. Edited by W. Bran

Physics

Optics

Scientific paper

We present the first NACO thermal infrared observations of the Galactic Center. L'-band imaging has been performed during NACO Science Verification nights in 2002. During these observations, the separation between S2, the closest star to Sgr A*, and the black hole was too small to directly see a counterpart of the latter. However we have detected a thermal infrared excess that could be its signature. In addition, the Northern Arm, a gaseous structure revealed with unprecedented details, is found to be made of intersecting and nested arclets, which doesn't match with the previous interpretations of a stream of matter orbiting around the central black hole. The 2003 observations in the L'- and M'-bands have revealed an unambiguous emission from Sgr A*. The discovery of very red sources aligned with this counterpart may be the signature of a jet coming from the black hole.

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