Flare of SGR A* at Short Millimeter Wavelengths

Details Flare of SGR A* at Short Millimeter Wavelengths Flare of SGR A* at Short Millimeter Wavelengths

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aspc..186..105t&link_type=abstract

The Central Parsecs of the Galaxy, ASP Conference Series, Vol. 186. Edited by Heino Falcke, Angela Cotera, Wolfgang J. Duschl, F

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Scientific paper

We have performed 3 sets of one-month intensity monitor observations toward Sgr A*, at ν = 100 and 140 GHz from 1996 to 1998 using the Nobeyama Millimeter Array. We got following results; 1) We detected a flare of Sgr A* in March 1998. The flux density at ν = 100 GHz was flared over (Δ S/S =) 100% in a week and decreased to the mean flux density within two weeks. The flux density in the flare at ν = 140 GHz was also increased over (Δ S/S =) 100%. 2) The flux densities in the flare are consistent with the power-law spectrum of α = 0.6 (S ~ να). On the other hand, the mean flux densities in quiescent phase in 1996--1998 are consistent with the power-law spectrum of α = 0.3.

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