H Balmer lines in terrestrial aurora: Historical record and new observations by OSIRIS on Odin

R. L. Gattinger; A. Egeland; A. E. BourassaN. D. LloydD. A. DegensteinJ. StegmanE. J. Llewellyn

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H Balmer lines in terrestrial aurora: Historical record and new observations by OSIRIS on Odin

机译：在地球极光H巴尔末线:历史记录和新的观察奥西里斯奥丁

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The H Balmer emissions were first identified in terrestrial aurora by Vegard (1939). The earliest photographic spectral observations are reviewed. In the subsequent decade, the intensity ratios for H_α, H_β, and H_γ were measured, and the well-known line broadening and blue shift were established. Recently, the H_α, H_γ, Hδ, and H_ε features have been measured by OSIRIS on Odin. The Balmer components are resolved from other auroral features using sets of synthetic spectra. The measured intensity ratios are in good agreement with an extensive set of published model calculations. The presented observations are in the polar region averaged over limb tangent altitudes from 100 to 105 km, approximately perpendicular to the terrestrial magnetic field lines, for this geometry showing Doppler broadening without obvious Doppler shifts. The OSIRISmeasured full-width at half-height of the H_α feature is 2.2 nm corresponding to an H atom velocity of 500 km s~(-1) and energy approximately 1.3 keV.

机译：H巴尔莫排放被首次发现地球极光Vegard(1939)。摄影光谱观测进行了综述。在随后的十年中,强度比率对H_α,H_β,H_γ测量,和著名的谱线增宽,蓝移建立。在奥丁特性测量了奥西里斯。解决其他的巴尔莫组件极光使用套合成光谱特性。测量强度比率良好协议提供了大量的出版模型计算。在极地地区肢体的平均值切线高度100至105公里,近似垂直于地面磁场线,这个几何图形的显示多普勒展宽没有明显的多普勒转变。半高的H_α特性是2.2海里对应于一个H原子的速度500公里s ~(1)和大约1.3 keV能量。

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《Journal of Geophysical Research, A. Space Physics: JGR》 |2010年第9期|A09306:1-A09306:9|共9页
作者
R. L. Gattinger; A. Egeland; A. E. BourassaN. D. LloydD. A. DegensteinJ. StegmanE. J. Llewellyn;
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作者单位

Department of Physics, University of Oslo, Oslo, Norway;

ISAS, Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, Canada;

Department of Meteorology, Stockholm University, Stockholm, Sweden;

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正文语种英语
中图分类空间物理;
关键词
terrestrial; DOPPLER BROADENING; intensity radioBalmer seriesauroraspolar regionsBLUE SHIFTspectral line broadening;

机译：地面;多普勒展宽;强度无线电Balmer series极光极地BLUE SHIFT光谱线展宽;

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H Balmer lines in terrestrial aurora: Historical record and new observations by OSIRIS on Odin

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