MAVEN IUVS observations of the aftermath of the Comet Siding Spring meteor shower on Mars

Schneider, Nick; Deighan, Justin; Stewart, Ian; McClintock, Bill; Jain, Sonal; Chaffin, Mike; Stiepen, Arnaud; Crismani, Matteo; Plane, J; Carrillo-Sánchez, J; Evans, Scott; Stevens, Mike; Yelle, Roger; Clarke, John; Holsclaw, Greg; Montmessin, Franck; Jakosky, Bruce M.

doi:10.1002/2015GL063863

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MAVEN IUVS observations of the aftermath of the Comet Siding Spring meteor shower on Mars

Schneider, Nick; Deighan, Justin; Stewart, Ian et al.

2015 • In Geophysical Research Letters

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https://hdl.handle.net/2268/183372

DOI
10.1002/2015GL063863

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Keywords :

Mars; comet; atmosphere; siding spring; aeronomy

Abstract :

[en] We report the detection of intense emission from magnesium and iron in Mars' atmosphere caused by a meteor shower following Comet Siding Spring's close encounter with Mars. The observations were made with the Imaging Ultraviolet Spectrograph, a remote sensing instrument on the Mars Atmosphere and Volatile EvolutioN spacecraft orbiting Mars. Ionized magnesium caused the brightest emission from the planet's atmosphere for many hours, resulting from resonant scattering of solar ultraviolet light. Modeling suggests a substantial fluence of low-density dust particles 1–100 µm in size, with the large amount and small size contrary to predictions. The event created a temporary planet-wide ionospheric layer below Mars' main dayside ionosphere. The dramatic meteor shower response at Mars is starkly different from the case at Earth, where a steady state metal layer is always observable but perturbations caused by even the strongest meteor showers are challenging to detect.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Schneider, Nick

Deighan, Justin

Stewart, Ian

McClintock, Bill

Jain, Sonal

Chaffin, Mike

Stiepen, Arnaud ; Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Crismani, Matteo

Plane, J

Carrillo-Sánchez, J

More authors (7 more)

Language :

English

Title :

MAVEN IUVS observations of the aftermath of the Comet Siding Spring meteor shower on Mars

Publication date :

16 June 2015

Journal title :

Geophysical Research Letters

ISSN :

0094-8276

eISSN :

1944-8007

Publisher :

American Geophysical Union, Washington, United States - District of Columbia

Peer reviewed :

Peer Reviewed verified by ORBi

Commentary :

http://onlinelibrary.wiley.com/doi/10.1002/2015GL063863/full

Available on ORBi :

since 29 June 2015

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