GSTDTAP  > 气候变化
DOI10.1029/2020GL088927
MAVEN SEP observations of Scorpius X‐1 X‐rays at Mars: A mid‐atmosphere occultation analysis technique
A. Rahmati; D. E. Larson; T. E. Cravens; R. J. Lillis; C. O. Lee; P. A. Dunn
2020-10-29
发表期刊Geophysical Research Letters
出版年2020
英文摘要

We report on the first observations of atmospheric occultations at Mars of ~10 keV X‐rays from an extra‐solar source identified as Scorpius X‐1. The measurements are taken by the SEP (Solar Energetic Particle) instrument on the MAVEN (Mars Atmosphere and Volatile EvolutioN) spacecraft. The detected X‐ray photons from Scorpius X‐1 penetrate the Martian atmosphere down to ~70 km altitude, before being attenuated by the neutrals in the atmosphere. The occultation altitude varies by a few km depending on the source X‐ray energy and the atmospheric neutral density. In this work, we study the detection response of SEP to Scorpius X‐1 X‐rays and demonstrate that X‐ray occultation data can be used in conjunction with a model of the light extinction curve in order to gain insights into the neutral density of the Mars atmosphere in the 50‐100 km altitude range, an important and largely unexplored altitude range at Mars.

领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/301812
专题气候变化
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A. Rahmati,D. E. Larson,T. E. Cravens,等. MAVEN SEP observations of Scorpius X‐1 X‐rays at Mars: A mid‐atmosphere occultation analysis technique[J]. Geophysical Research Letters,2020.
APA A. Rahmati,D. E. Larson,T. E. Cravens,R. J. Lillis,C. O. Lee,&P. A. Dunn.(2020).MAVEN SEP observations of Scorpius X‐1 X‐rays at Mars: A mid‐atmosphere occultation analysis technique.Geophysical Research Letters.
MLA A. Rahmati,et al."MAVEN SEP observations of Scorpius X‐1 X‐rays at Mars: A mid‐atmosphere occultation analysis technique".Geophysical Research Letters (2020).
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