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- W2068631029 abstract "We have performed monitoring observations of the flux density toward the Galactic center compact radio source, Sagittarius A* (Sgr A*), which is a supermassive black hole, from 1996 to 2005 using the Nobeyama Millimeter Array of the Nobeyama Radio Observatory, Japan. These monitoring observations of Sgr A* were carried out in the 3- and 2-mm (100 and 140 GHz) bands, and we have detected several flares of Sgr A*. We found intraday variation of Sgr A* in the 2000 March flare. The twofold increase timescale is estimated to be about 1.5 hr at 140 GHz. This intraday variability suggests that the physical size of the flare-emitting region is compact on a scale at or below about 12 AU (~150 Rs; Schwarzschild radius). On the other hand, clear evidence of long-term periodic variability was not found from a periodicity analysis of our current millimeter data set." @default.
- W2068631029 created "2016-06-24" @default.
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- W2068631029 date "2005-12-28" @default.
- W2068631029 modified "2023-10-18" @default.
- W2068631029 title "Flares of Sagittarius a* at Millimeter Wavelengths" @default.
- W2068631029 hasPublicationYear "2005" @default.
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