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Ultraviolet Observations of Coronal Mass Ejection Impact on Comet 67P/Churyumov-Gerasimenko by Rosetta Alice
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- Noonan, John W. (author)
- Southwest Res Inst, Dept Space Studies, Suite 300,1050 Walnut St, Boulder, CO 80302 USA;Univ Arizona, Lunar & Planetary Lab, 1629 E Univ Blvd, Tucson, AZ 85721 USA
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- Stern, S. Alan (author)
- Southwest Res Inst, Dept Space Studies, Suite 300,1050 Walnut St, Boulder, CO 80302 USA
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- Feldman, Paul D. (author)
- Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA
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- Broiles, Thomas (author)
- Space Sci Inst, 4750 Walnut St,Suite 205, Boulder, CO 80301 USA
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- Wedlund, Cyril Simon (author)
- Univ Oslo, Dept Phys, Box 1048 Blindern, N-0316 Oslo, Norway
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- Edberg, Niklas J. T. (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Schindhelm, Eric (author)
- Ball Aerosp & Technol Corp, 1600 Commerce St, Boulder, CO 80301 USA
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- Parker, Joel Wm (author)
- Southwest Res Inst, Dept Space Studies, Suite 300,1050 Walnut St, Boulder, CO 80302 USA
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- Keeney, Brian A. (author)
- Southwest Res Inst, Dept Space Studies, Suite 300,1050 Walnut St, Boulder, CO 80302 USA
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- Vervack, Ronald J., Jr. (author)
- Johns Hopkins Univ, Appl Phys Lab, 11100 Johns Hopkins Rd, Laurel, MD 20723 USA
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- Steffl, Andrew J. (author)
- Southwest Res Inst, Dept Space Studies, Suite 300,1050 Walnut St, Boulder, CO 80302 USA
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- Knight, Matthew M. (author)
- Univ Maryland, Astron Dept, College Pk, MD 20742 USA
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- Weaver, Harold A. (author)
- Johns Hopkins Univ, Appl Phys Lab, 11100 Johns Hopkins Rd, Laurel, MD 20723 USA
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- Feaga, Lori M. (author)
- Univ Maryland, Astron Dept, College Pk, MD 20742 USA
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- A'Hearn, Michael (author)
- Univ Maryland, Astron Dept, College Pk, MD 20742 USA
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- Bertaux, Jean-Loup (author)
- CNRS UVSQ IPSL, LATMOS, 11 Blvd Alembert, F-78280 Guyancourt, France
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(creator_code:org_t)
- 2018-06-18
- 2018
- English.
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In: Astronomical Journal. - : IOP PUBLISHING LTD. - 0004-6256 .- 1538-3881. ; 156:1
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https://doi.org/10.3...
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Abstract
Subject headings
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- The Alice ultraviolet spectrograph on the European Space Agency Rosetta spacecraft observed comet 67P/Churyumov-Gerasimenko in its orbit around the Sun for just over two years. Alice observations taken in 2015 October, two months after perihelion, show large increases in the comet's Ly beta, OI 1304, OI 1356, and CI 1657 angstrom atomic emission that initially appeared to indicate gaseous outbursts. However, the Rosetta Plasma Consortium instruments showed a coronal mass ejection (CME) impact at the comet coincident with the emission increases, suggesting that the CME impact may have been the cause of the increased emission. The presence of the semi-forbidden OI 1356 angstrom emission multiplet is indicative of a substantial increase in dissociative electron impact emission from the coma, suggesting a change in the electron population during the CME impact. The increase in dissociative electron impact could be a result of the interaction between the CME and the coma of 67P or an outburst coincident with the arrival of the CME. The observed dissociative electron impact emission during this period is used to characterize the O-2 content of the coma at two peaks during the CME arrival. The mechanism that could cause the relationship between the CME and UV emission brightness is not well constrained, but we present several hypotheses to explain the correlation.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- comets: individual (67P/C-G)
- Sun: coronal mass ejections (CMEs)
- ultraviolet: planetary systems
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Noonan, John W.
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Stern, S. Alan
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Feldman, Paul D.
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Broiles, Thomas
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Wedlund, Cyril S ...
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Edberg, Niklas J ...
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Schindhelm, Eric
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Parker, Joel Wm
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Keeney, Brian A.
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Vervack, Ronald ...
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Steffl, Andrew J ...
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Knight, Matthew ...
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Weaver, Harold A ...
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Feaga, Lori M.
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A'Hearn, Michael
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Bertaux, Jean-Lo ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Astronomical Jou ...
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Uppsala University