Study of interplanetary magnetic field with atomic realignment

Details Study of interplanetary magnetic field with atomic realignment Study of interplanetary magnetic field with atomic realignment

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p11f1630y&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P11F-1630

Physics

[5734] Planetary Sciences: Fluid Planets / Magnetic Fields And Magnetism, [6210] Planetary Sciences: Solar System Objects / Comets, [6219] Planetary Sciences: Solar System Objects / Io

Scientific paper

We demonstrate a new way of studying interplanetary magnetic field - atomic alignment. Instead of sending thousands of space probes, atomic alignment allows magnetic mapping with any ground telescope facilities equipped with spectrometer and polarimeter. The polarization of spectral lines that are pumped by the anisotropic radiation from the sun is influenced by the magnetic alignment, which happens for weak magnetic field (<1G). As a result, the linear polarization becomes an excellent tracer of the embedded magnetic field. The method is illustrated by our synthetic observations of Iofootnote{The third largest moon of Jupiter.} and comet Halley. A uniform density distribution of Na was considered and polarization at each point was then constructed. Both spatial and temporal variations of turbulent magnetic field can be traced with this technique as well. For remote regions like the boundary of interstellar medium, atomic alignment provides a unique diagnostics of magnetic field, which is crucial for understanding the physical processes such as the IBEX ribbons discovered recently.

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