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| Paper: |
Flaring Emission from Sagittarius A* at Millimeter Wavelengths |
| Volume: |
439, The Galactic Center: a Window to the Nuclear Environment of Disk Galaxies |
| Page: |
319 |
| Authors: |
Li, J.; Shen, Z.; Miyazaki, A.; Huang, L.; Sault, R. J.; Miyoshi, M.; Tsuboi, M.; Tsutsumi, T. |
| Abstract: |
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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