Effects of the interstellar magnetic field on the shape of the inner heliosheah and on the penetration of interstellar neutrals in the heliosphere

Details Effects of the interstellar magnetic field on the shape of the inner heliosheah and on the penetration of interstellar neutrals in the heliosphere Effects of the interstellar magnetic field on the shape of the inner heliosheah and on the penetration of interstellar neutrals in the heliosphere

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh51a1198a&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SH51A-1198

Physics

2124 Heliopause And Solar Wind Termination, 2126 Heliosphere/Interstellar Medium Interactions, 2144 Interstellar Gas, 2152 Pickup Ions

Scientific paper

Recently Lallement et al. (2005, Science, 307, 1447) reported that the direction of the flow of interstellar neutral hydrogen in the heliosphere is deflected by ~4° from the direction of the pristine local interstellar gas flow. The most probable physical phenomenon responsible for such a deviation is the interstellar magnetic field inclined to the direction of the interstellar gas flow. In this case the flow of the interstellar charged component is asymmetric and distorted in the region of the solar wind interaction with the local interstellar medium, which is called the heliospheric interface. The interstellar H atoms pass through the heliospheric interface and interact with the plasma component by charge exchange. Some imprints of the asymmetry of the heliospheric plasma interface should be seen in the distribution of the interstellar H atom component. In this letter we explore this scenario quantitatively and demonstrate that our new self-consistent 3D kinetic-MHD model of the solar wind interaction with the magnetized interstellar plasma is able to produce the measured deviation in the case of a rather strong interstellar magnetic field of ~2.5 μG inclined by ~45° to the direction of interstellar flow. Shapes and locations of the TS and the HP are discussed.

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