Journal articles
Ultraviolet Observations of Coronal Mass Ejection Impact on Comet 67P/Churyumov–Gerasimenko by Rosetta Alice
John Noonan
1, 2
S. Alan Stern
1
Paul Feldman
3
Thomas Broiles
4
Cyril Simon Wedlund
5
Niklas Edberg
6
Eric Schindhelm
7
Joel Wm. Parker
1
Brian Keeney
1
Ronald Vervack Jr
8
Andrew Steffl
1
Matthew Knight
9
Harold Weaver
8
Lori Feaga
9
Michael A’hearn
9
Jean-Loup Bertaux
10
Cyril Simon Wedlund 5
Author
Niklas J. T. Edberg 6
Author
Eric Schindhelm 7
Author
Joel Wm. Parker 1
Author
Harold A. Weaver 8
Author
Lori M. Feaga 9
Author
Michael A’hearn 9
Author
Jean-Loup Bertaux 10
Mail :
Author
1
Department of Space Studies [Boulder] (United States)
- SwRI - Southwest Research Institute [Boulder] (1050 Walnut St, Suite 300, Boulder, CO 80302 - United States)
2
LPL - Lunar and Planetary Laboratory [Tucson] (Tucson, AZ 85721-0092 - United States)
- University of Arizona (Tucson AZ 85721 USA - United States)
3
Department of Physics and Astronomy [Baltimore] (3400 North Charles Street, Baltimore, MD 21218 - United States)
- JHU - Johns Hopkins University (Baltimore, Maryland 410-516-8000 - United States)
4
SSI - Space Science Institute [Boulder] (4750 Walnut St, Suite 205,
Boulder, CO 80301 - United States)
5
Department of Physics [Oslo] (P.O. Box 1048, Blindern, 0316 Oslo - Norway)
- Faculty of Mathematics and Natural Sciences [Oslo] (Fysikkbygningen Ost, Sem Saelands vei 24, 0371 OSLO - Norway)
- UiO - University of Oslo (P.O 1072 Blindern 0316 Oslo - Norway)
6
IRF - Swedish Institute of Space Physics [Uppsala] (Box 537 SE-751 21 Uppsala - Sweden)
7
Ball Aerospace and Technologies Corp. (Boulder, Colorado - United States)
8
APL - Johns Hopkins University Applied Physics Laboratory [Laurel, MD] (11100 Johns Hopkins Road, Laurel, Maryland - United States)
9
Department of Astronomy [College Park] (United States)
- University of Maryland [College Park] (College Park, MD 20742 - United States)
- University of Maryland System (United States)
10
IMPEC - LATMOS (France)
- LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales (11 boulevard d'Alembert
Quartier des Garennes
78280 - Guyancourt - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8190 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8190 (France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8190 (55 avenue de Paris - 78035 Versailles cedex - France)
- SU - Sorbonne Université : UMR8190 (21 rue de l’École de médecine - 75006 Paris - France)
Abstract : 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 Lyβ, O i 1304, O i 1356, and C i 1657 Å 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 O i 1356 Å 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 O2 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.
Document type :
Journal articles
Complete list of metadatas
https://hal-insu.archives-ouvertes.fr/insu-01839041
Contributor : Catherine Cardon <>
Submitted on : Friday, July 13, 2018 - 5:08:43 PM
Last modification on : Tuesday, February 18, 2020 - 2:12:02 PM
Contributor : Catherine Cardon <>
Submitted on : Friday, July 13, 2018 - 5:08:43 PM
Last modification on : Tuesday, February 18, 2020 - 2:12:02 PM
Links full text
Identifiers
- HAL Id : insu-01839041, version 1
- DOI : 10.3847/1538-3881/aac432
Collections
INSU | CNRS | UVSQ | UNIV-PARIS-SACLAY | SORBONNE-UNIVERSITE | LATMOS | SU-SCIENCES
Citation
John Noonan, S. Alan Stern, Paul Feldman, Thomas Broiles, Cyril Simon Wedlund, et al.. Ultraviolet Observations of Coronal Mass Ejection Impact on Comet 67P/Churyumov–Gerasimenko by Rosetta Alice. Astronomical Journal, American Astronomical Society, 2018, 156 (1), pp.art. 16. ⟨10.3847/1538-3881/aac432⟩. ⟨insu-01839041⟩
Metrics
Record views
