Flaring Emission from Sagittarius A* at Millimeter Wavelengths

Details Flaring Emission from Sagittarius A* at Millimeter Wavelengths Flaring Emission from Sagittarius A* at Millimeter Wavelengths

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aspc..439..319l&link_type=abstract

The Galactic Center: a Window to the Nuclear Environment of Disk Galaxies. Proceedings of a workshop held at Shanghai, China on

Astronomy and Astrophysics

Astronomy

Scientific paper

We present flaring emission observations from the Galactic Center compact radio source Sgr A* with the Australia Telescope Compact Array at mm wavelengths. Careful calibrations of both elevation-dependent and time-dependent gains have enabled us to establish the variability behavior of Sgr A*. Sgr A* was found to be very active, and several flares were detected at 3 mm wavelength during our observations from 2005 to 2008. On 2008 October 3, we detected flare emission quasi-simultaneously at 3 and 7 mm wavelengths, with the 3 mm flare leading 7 mm by about 1 hr. The observed time delay between 3 and 7 mm wavelength seems to support the expanding plasmon model.

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