Variation of Jupiter's aurora observed by Hisaki/EXCEED: 1. Observed characteristics of the auroral electron energies compared with observations performed using HST/STIS

被引：14

作者：

Tao, Chihiro ^{[1
,2
,3
]}

Kimura, Tomoki ^{[4
,5
]}

Badman, Sarah V. ^{[6
]}

Murakami, Go ^{[4
]}

Yoshioka, Kazuo ^{[4
,7
]}

Tsuchiya, Fuminori ^{[8
]}

Andre, Nicolas ^{[1
]}

Yoshikawa, Ichiro ^{[9
]}

Yamazaki, Atsushi ^{[4
]}

Shiota, Daikou ^{[10
]}

Tadokoro, Hiroyasu ^{[11
,12
]}

Fujimoto, Masaki ^{[4
]}

机构：

[1] Univ Toulouse, UPS OMP, CNRS, IRAP, Toulouse, France

[2] NICT, Tokyo, Japan

[3] Tohoku Univ, Dept Geophys, Sendai, Miyagi, Japan

[4] JAXA, ISAS, Sagamihara, Kanagawa, Japan

[5] RIKEN, Saitama, Japan

[6] Univ Lancaster, Dept Phys, Lancaster, England

[7] Univ Tokyo, Dept Earth & Planetary Sci, Tokyo, Japan

[8] Tohoku Univ, PPARC, Sendai, Miyagi, Japan

[9] Univ Tokyo, Dept Complex Sci & Engn, Kashiwa, Chiba, Japan

[10] Nagoya Univ, STEL, Nagoya, Aichi, Japan

[11] Tokyo Univ Technol, Sch Comp Sci, Tokyo, Japan

[12] Musashino Univ, Dept Environm Syst Sci, Tokyo, Japan

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2016年 / 121卷 / 05期

基金：

日本学术振兴会;

关键词：

Jupiter; aurora; Hisaki; EXCEED; Hubble Space Telescope; EXTREME-ULTRAVIOLET SPECTROSCOPE; MAGNETIC-FIELD; SOLAR-WIND; SPECTRAL OBSERVATIONS; JOVIAN AURORA; MAGNETOSPHERE; EMISSIONS; PLANETS; SYSTEM; EXCEED;

D O I：

10.1002/2015JA021271

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Temporal variation of Jupiter's northern aurora is detected using the Extreme Ultraviolet Spectroscope for Exospheric Dynamics (EXCEED) on board JAXA's Earth-orbiting planetary space telescope Hisaki. The wavelength coverage of EXCEED includes the H-2 Lyman and Werner bands at 80-148nm from the entire northern polar region. The prominent periodic modulation of the observed emission corresponds to the rotation of Jupiter's main auroral oval through the aperture, with additional superposed -50%-100% temporal variations. The hydrocarbon color ratio (CR) adopted for the wavelength range of EXCEED is defined as the ratio of the emission intensity in the long wavelength range of 138.5-144.8nm to that in the short wavelength range of 126.3-130nm. This CR varies with the planetary rotation phase. Short- (within one planetary rotation) and long-term (> one planetary rotation) enhancements of the auroral power are observed in both wavelength ranges and result in a small CR variation. The occurrence timing of the auroral power enhancement does not clearly depend on the central meridian longitude. Despite the limitations of the wavelength coverage and the large field of view of the observation, the auroral spectra and CR-brightness distribution measured using EXCEED are consistent with other observations.

引用

页码：4041 / 4054

页数：14

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