The Direction of the Interstellar Magnetic Field at the Sun

Details The Direction of the Interstellar Magnetic Field at the Sun The Direction of the Interstellar Magnetic Field at the Sun

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh21b1613f&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SH21B-1613

Physics

2126 Heliosphere/Interstellar Medium Interactions, 2144 Interstellar Gas

Scientific paper

The direction of the interstellar magnetic field (ISMF) at the heliosphere has been obtained from the weak polarizations of optical light from nearby stars in the direction of the heliosphere nose. Polarization position angles (PA) trace the magnetic field direction, and the optical polarization PA agrees with the ISMF direction traced by the offset between the upwind directions of interstellar HeI and HI inside of the heliosphere. (The upwind directions of HI and HeI must first be adjusted to a consistent coordinate system, which here is taken to be the J2000 system.) These findings suggest that high signal-to-noise ground-based polarization data of nearby stars may possibly provide a low-cost method to monitor the magnetic field in the outer heliosheath.

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