SGR A*: ITS Flaring Activity

Details SGR A*: ITS Flaring Activity SGR A*: ITS Flaring Activity

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21321005y&link_type=abstract

American Astronomical Society, AAS Meeting #213, #210.05; Bulletin of the American Astronomical Society, Vol. 41, p.282

Astronomy and Astrophysics

Astronomy

Scientific paper

Highlights of multi-wavelength observations of the massive black hole at the Galactic center, Sgr A*, will be presented. Simultaneous observations of flare emission with arcsecond and milliarcsecond resolutions indicate that the emission is arising from the innermost region of gas dynamical flow near Sgr A*. The variability and correlation of its flare emission indicate that flares vary on hourly time scales and show time delays between different wavelength bands. A simple model of a bubble of synchrotron emitting electrons cooling via adiabatic expansion is presented to explain the time delay between various wavelengths, the asymmetric shape of the light curves, and the observed polarization of the flare emission in radio wavelengths.

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