Exploring Key Characteristics in Saturn's Infrared Auroral Emissions Using VLT-CRIRES: H-3(+) Intensities, Ion Line-of-Sight Velocities, and Rotational Temperatures

doi:10.1029/2019GL083250

GSTDTAP > 气候变化

DOI	10.1029/2019GL083250
	Exploring Key Characteristics in Saturn's Infrared Auroral Emissions Using VLT-CRIRES: H-3(+) Intensities, Ion Line-of-Sight Velocities, and Rotational Temperatures
	Chowdhury, M. N.1; Stallard, T. S.1; Melin, H.1; Johnson, R. E.2
	2019-07-16
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2019
卷号	46 期号:13 页码:7137-7146
文章类型	Article
语种	英语
国家	England; Finland
英文摘要	We present a study of Saturn's H-3(+) northern auroral emission using data from 19 May 2013 from the Very Large Telescope's long-slit spectrometer Cryogenic Infrared Echelle Spectrograph (VLT-CRIRES). Adaptive optics, combined with the spectral resolution of VLT-CRIRES (lambda/Delta lambda similar to 100,000), offers unprecedented spectrally resolved views of Saturn's infrared aurora. Discrete H-3(+) emission lines-used to derive dawn-to-dusk profiles of auroral intensity, ion line-of-sight velocity, and thermospheric temperature-reveal a dawn-enhanced aurora with an average temperature of 361 (+/- 48) K and a localized dark region in the emission co-located with a noon-to-midnight (and vice versa) flow in the ion velocity on the scale of similar to 1 km/s, resembling an ionospheric polar vortex. A temperature hotspot of 379 (+/- 66) K may be driving an emission region, corresponding to a location where H-3(+) is failing to cool the thermosphere. Results presented here have implications for current understanding on the complex nature of Saturn's thermosphere-ionosphere-magnetosphere interaction.
领域	气候变化
收录类别	SCI-E
WOS记录号	WOS:000476960100009
WOS关键词	POLAR IONOSPHERIC FLOWS ; ENERGY INPUTS ; NORTHERN ; ATMOSPHERE ; MORPHOLOGY ; DENSITY ; PROFILE ; UV
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/185028
专题	气候变化
作者单位	1.Univ Leicester, Dept Phys & Astron, Leicester, Leics, England; 2.Hotelli Korpikartano, Inari, Finland
推荐引用方式 GB/T 7714	Chowdhury, M. N.,Stallard, T. S.,Melin, H.,et al. Exploring Key Characteristics in Saturn's Infrared Auroral Emissions Using VLT-CRIRES: H-3(+) Intensities, Ion Line-of-Sight Velocities, and Rotational Temperatures[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(13):7137-7146.
APA	Chowdhury, M. N.,Stallard, T. S.,Melin, H.,&Johnson, R. E..(2019).Exploring Key Characteristics in Saturn's Infrared Auroral Emissions Using VLT-CRIRES: H-3(+) Intensities, Ion Line-of-Sight Velocities, and Rotational Temperatures.GEOPHYSICAL RESEARCH LETTERS,46(13),7137-7146.
MLA	Chowdhury, M. N.,et al."Exploring Key Characteristics in Saturn's Infrared Auroral Emissions Using VLT-CRIRES: H-3(+) Intensities, Ion Line-of-Sight Velocities, and Rotational Temperatures".GEOPHYSICAL RESEARCH LETTERS 46.13(2019):7137-7146.