DOI: 10.1002/grl.50964
论文题名: A method for remote sensing of weak planetary magnetic fields: Simulated application to Mars
作者: Larsson R. ; Ramstad R. ; Mendrok J. ; Buehler S.A. ; Kasai Y.
刊名: Geophysical Research Letters
ISSN: 0094-8531
EISSN: 1944-8262
出版年: 2013
卷: 40, 期: 19 起始页码: 5014
结束页码: 5018
语种: 英语
英文关键词: exoplanets
; magnetism
; Mars
; remote sensing
; Zeeman effect
Scopus关键词: Crustal magnetic fields
; Exo-planets
; Magnetic field strengths
; Mars
; Martian atmospheres
; Planetary magnetic fields
; Weak magnetic fields
; Zeeman effect
; Computer simulation
; Extrasolar planets
; Magnetism
; Remote sensing
; Spectroscopy
; Magnetic fields
; frequency analysis
; magnetic field
; Mars
; oxygen
; remote sensing
; simulation
; spectral analysis
英文摘要: We present a method for characterizing the magnetic anomalies from the crustal fields in the lower atmosphere of Mars that requires two perpendicular linear polarization measurements of the Zeeman effect. The maximum effect of the magnetic field on the signal is found at the Doppler broadening width at low pressures rather than at the magnetically induced line frequency shift, and the effect strongly increases with increasing magnetic field strength. Based on simulations of the Zeeman-affected spectral cross section of the 119 GHz O 2 line in a model Martian atmosphere at various magnetic field strengths, we conclude that it should be possible to probe the strength of the magnetic anomalies remotely with presently available technology. We discuss limitations of the method, how these results could be relevant to the interpretation of residuals in Herschel/HIFI observations of Mars, as well as the application to detection of exoplanetary magnetic fields. Key Points Introduction of a new polarimetry method for detection of weak magnetic fields Model of Mars crustal magnetic fields' influence on oxygen spectra Discussion on using the Zeeman effect for detection of exoplanetary magnetism ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884766087&doi=10.1002%2fgrl.50964&partnerID=40&md5=f4d68440adc5a78ff5d984ac8e00f521
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5795
Appears in Collections: 气候减缓与适应
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作者单位: Division of Space Technology, Luleå University of Technology, Kiruna, Sweden
Recommended Citation:
Larsson R.,Ramstad R.,Mendrok J.,et al. A method for remote sensing of weak planetary magnetic fields: Simulated application to Mars[J]. Geophysical Research Letters,2013-01-01,40(19).