The 3.5mm polarization and rotation measure of Sgr A*

Details The 3.5mm polarization and rotation measure of Sgr A* The 3.5mm polarization and rotation measure of Sgr A*

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atnf.prop.998ma&link_type=abstract

ATNF proposal C1727, Semester: October, 2007

Physics

Galactic, Atca

Scientific paper

Recent polarimetric mm and sub-mm observations of Sgr A*, particularly at 86GHz, have established its mean rotation measure of -(44 +/-3) x 10^4 rad/m^2, and accretion rate of dM/dt=(0.2-4) x 10^(-8) MSun/yr. However, these observations also show that polarization position angle varies on timescales at least as short as a day, indicating either intrinsic PA variations or RM (and thus dM/dt) variations. We wish to re-detect the linear polarization with ATCA, measure its variability at 3mm and disentangle PA and RM variations by observing over a wide bandwidth.

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