Heliospheric Asymmetries and 2-3 kHz Radio Emission Under Strong Interstellar Magnetic Field Conditions

Details Heliospheric Asymmetries and 2-3 kHz Radio Emission Under Strong Interstellar Magnetic Field Conditions Heliospheric Asymmetries and 2-3 kHz Radio Emission Under Strong Interstellar Magnetic Field Conditions

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...695l..31p&link_type=abstract

The Astrophysical Journal Letters, Volume 695, Issue 1, pp. L31-L34 (2009).

Astronomy and Astrophysics

Astronomy

23

Ism: Kinematics And Dynamics, Magnetic Fields, Solar Wind

Scientific paper

We discuss the asymmetry of the major heliospheric discontinuities obtained from the analysis of three-dimensional modeling of the solar wind interaction with the local interstellar medium (LISM). The flow of charged particles is governed by the ideal MHD equations and the transport of neutral particles is described by the Boltzmann equation. The emphasis is on the asymmetries of the termination shock (TS) and the heliopause under the combined action of the interstellar and interplanetary magnetic fields (ISMF and IMF) in the presence of neutral hydrogen atoms. It is shown that an ISMF of a strength greater than 4 μG can account for the 10 AU difference in the TS heliocentric distances observed by the Voyager 1 and Voyager 2 spacecraft. We analyze the deflection of neutral hydrogen flow from its original direction in the unperturbed LISM and conclude that it remains within the range measured in the SOHO SWAN experiment. The impact is analyzed of a strong ISMF on the 2-3 kHz radio emission observed by the Voyager spacecraft, using new estimates of the radio emission conditions.

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