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Ionospheric plasma ...
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Galand, M.Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
(author)
Ionospheric plasma of comet 67P probed by Rosetta at 3 au from the Sun
- Article/chapterEnglish2016
Publisher, publication year, extent ...
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2016-11-10
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Oxford University Press (OUP),2016
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:kth-273849
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-273849URI
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https://doi.org/10.1093/mnras/stw2891DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-328422URI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20200602
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We propose to identify the main sources of ionization of the plasma in the coma of comet 67P/Churyumov-Gerasimenko at different locations in the coma and to quantify their relative importance, for the first time, for close cometocentric distances (< 20 km) and large heliocentric distances (> 3 au). The ionospheric model proposed is used as an organizing element of a multi-instrument data set from the Rosetta Plasma Consortium (RPC) plasma and particle sensors, from the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis and from the Microwave Instrument on the Rosetta Orbiter, all on board the ESA/Rosetta spacecraft. The calculated ionospheric density driven by Rosetta observations is compared to the RPC-Langmuir Probe and RPC-Mutual Impedance Probe electron density. The main cometary plasma sources identified are photoionization of solar extreme ultraviolet (EUV) radiation and energetic electron-impact ionization. Over the northern, summer hemisphere, the solar EUV radiation is found to drive the electron density - with occasional periods when energetic electrons are also significant. Over the southern, winter hemisphere, photoionization alone cannot explain the observed electron density, which reaches sometimes higher values than over the summer hemisphere; electron-impact ionization has to be taken into account. The bulk of the electron population is warm with temperature of the order of 7-10 eV. For increased neutral densities, we show evidence of partial energy degradation of the hot electron energy tail and cooling of the full electron population.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Heritier, K. L.Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
(author)
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Odelstad, EliasUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)eliod143
(author)
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Henri, P.Univ Orleans, CNRS, LPC2E, 3A,Ave Rech Sci, F-45071 Orleans 2, France.
(author)
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Broiles, T. W.Southwest Res Inst, PO Drawer 28510, San Antonio, TX 78228 USA.
(author)
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Allen, A. J.Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
(author)
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Altwegg, K.Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland.
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Beth, A.Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
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Burch, J. L.Southwest Res Inst, PO Drawer 28510, San Antonio, TX 78228 USA.
(author)
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Carr, C. M.Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
(author)
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Cupido, E.Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
(author)
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Eriksson, AndersUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)andeerik
(author)
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Glassmeier, K. -H
(author)
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Johansson, Fredrik L.Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)frejo741
(author)
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Lebreton, J. -P
(author)
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Mandt, K. E.Southwest Res Inst, PO Drawer 28510, San Antonio, TX 78228 USA.
(author)
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Nilsson, H.Swedish Inst Space Phys, POB 812, SE-98128 Kiruna, Sweden.
(author)
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Richter, I.TU Braunschweig, Inst Geophys & Extraterr Phys, Mendelssohnstr 3, D-38106 Braunschweig, Germany.
(author)
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Rubin, M.Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland.
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Sagnieres, L. B. M.Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
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Schwartz, S. J.Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
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Semon, T.Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland.
(author)
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Tzou, C. -Y
(author)
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Vallieres, X.Univ Orleans, CNRS, LPC2E, 3A,Ave Rech Sci, F-45071 Orleans 2, France.
(author)
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Vigren, ErikUppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen(Swepub:uu)erivi300
(author)
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Wurz, P.Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland.
(author)
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Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.Institutet för rymdfysik, Uppsalaavdelningen
(creator_code:org_t)
Related titles
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In:Monthly notices of the Royal Astronomical Society: Oxford University Press (OUP)462, s. S331-S3510035-87111365-2966
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- By the author/editor
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Galand, M.
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Heritier, K. L.
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Odelstad, Elias
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Henri, P.
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Broiles, T. W.
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Allen, A. J.
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show more...
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Altwegg, K.
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Beth, A.
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Burch, J. L.
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Carr, C. M.
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Cupido, E.
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Eriksson, Anders
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Glassmeier, K. - ...
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Johansson, Fredr ...
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Lebreton, J. -P
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Mandt, K. E.
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Nilsson, H.
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Richter, I.
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Rubin, M.
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Sagnieres, L. B. ...
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Schwartz, S. J.
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Semon, T.
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Tzou, C. -Y
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Vallieres, X.
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Vigren, Erik
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Wurz, P.
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