Coordinated Observations of SgrA* in 2010

Details Coordinated Observations of SgrA* in 2010 Coordinated Observations of SgrA* in 2010

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.2986e&link_type=abstract

ATNF proposal C1825, Semester: April, 2010

Physics

Active Galactic Nuclei / Quasars, Atca

Scientific paper

Radio to X-ray multi-wavelength observations and IR polarization experiments have provided essential new insights into accretion/emission mechanisms related to Sgr A*, the super-massive black hole at the center of the Milky Way. Emission from highly polarized flares was found in the near-infrared that show a 17-20 min quasi-periodicity. The data are consistent with partially polarized non-thermal emission from confined hot spots in relativistic orbits around Sgr A*. Our previous runs including ATCA have provided clear evidence for adiabatic expansion of plasma. Variability on time scales of a few hours has been observed in the mm-regime. We propose for ATCA observations of Sgr A* embedded in a new coordinated mm/NIR/X-ray campaign on Sgr A* in May 2010 (Chandra approved VLT/APEX being scheduled now). The mm-data are essential to link the flares to possible outflow phenomena and to probe variability of the 3mm photosphere.

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