Joint two-point observations of LF-waves at 67P/Churyumov—Gerasimenko
Abstract
After the Rosetta mission reached its target comet 67P/Churyumov-Gerasimenko, the lander Philae touched down on the surface on 2014 November 12. During the First-Science-Sequence after touchdown the lander magnetometer ROMAP and the orbiter magnetometer RPC-MAG were both operating simultaneously which allowed for in situ magnetic two-point observations of the comet. This analysis aims at determining the characteristics of the low-frequency plasma waves present in the nucleus surface region, including frequency, propagation direction and velocity. These waves propagate predominantly from the nucleus towards the Sun with a mean phase velocity of ∼5.3 km s-1, a wavelength of ∼660 km and an average frequency of ∼8 mHz.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- July 2017
- DOI:
- 10.1093/mnras/stx1175
- Bibcode:
- 2017MNRAS.469S..68H
- Keywords:
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- magnetic fields;
- plasmas;
- methods: data analysis;
- comets: individual: 67P