Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20710304y&link_type=abstract
American Astronomical Society Meeting 207, #103.04; Bulletin of the American Astronomical Society, Vol. 37, p.1332
Astronomy and Astrophysics
Astronomy
Scientific paper
I review highlights of the results of two observing campaigns in 2004, designed to investigate the correlation of flare activity from Sgr A* between radio wavelengths and soft gamma-ray energies. We report the detection of a simultaneous X-ray and near-IR flare, as well as a sub-millimeter and near-IR flare using the NICMOS of HST, XMM-Newton and CSO. We explain the X-ray emission as arising from the population of near-IR-synchrotron-emitting relativistic particles, scattering sub-millimeter seed photons within the inner 10 RSch radius of Sgr A* up to X-rays and soft gamma-rays, detected by INTEGRAL. Using the inverse Compton scattering picture, we explain the lack of one-to-one X-ray counterparts to near-IR flares by the variation of the magnetic field and the spectral index distributions of the nonthermal particles. Lastly, we present a composite spectrum of Sgr A* based on these observing campaigns.
Bélanger Guillaume
Bower Geoffrey C.
Bushouse Howard
Dowell Charles (Darren)
Goldwurm Andréa
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