期刊
ASTRONOMY & ASTROPHYSICS
卷 619, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201834225
关键词
comets: general; comets: individual: 67P/Churyumov-Gerasimenko; plasmas; shock waves
资金
- Belgian Science Policy Office through the Solar-Terrestrial Centre of Excellence
- PRODEX/ROSETTA/ROSINA PEA [4000107705]
- Swedish National Space Board (SNSB) [201/15]
- Norwegian Research Council [240000]
The bow shock is the first boundary the solar wind encounters as it approaches planets or comets. The Rosetta spacecraft was able to observe the formation of a bow shock by following comet 67P/Churyumov-Gerasimenko toward the Sun, through perihelion, and back outward again. The spacecraft crossed the newly formed bow shock several times during two periods a few months before and after perihelion; it observed an increase in magnetic field magnitude and oscillation amplitude, electron and proton heating at the shock, and the diminution of the solar wind further downstream. Rosetta observed a cometary bow shock in its infancy, a stage in its development not previously accessible to in situ measurements at comets and planets.
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