Rights statement: Accepted for publication in Journal of Geophysical Research: Space Physics. Copyright 2016 American Geophysical Union. Further reproduction or electronic distribution is not permitted.
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Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License
Rights statement: Tao, C., et al. (2016), Variation of Jupiter's aurora observed by Hisaki/EXCEED: 1. Observed characteristics of the auroral electron energies compared with observations performed using HST/STIS, J. Geophys. Res. Space Physics, 121, doi:10.1002/2015JA021271. To view the published open abstract, go to http://dx.doi.org and enter the DOI.
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Variation of Jupiter's aurora observed by Hisaki/EXCEED: 1. Observed characteristics of the auroral electron energies compared with observations performed using HST/STIS
AU - Tao, Chihiro
AU - Kimura, Tomoki
AU - Badman, Sarah Victoria
AU - Murakami, Go
AU - Yoshioka, Kazuo
AU - Tsuchiya, Fuminori
AU - André, Nicolas
AU - Yoshikawa, Ichiro
AU - Yamazaki, Atsushi
AU - Shiota, Daikou
AU - Tadokoro, Hiroyasu
AU - Fujimoto, Masaki
N1 - Accepted for publication in Journal of Geophysical Research: Space Physics. Copyright 2016 American Geophysical Union. Further reproduction or electronic distribution is not permitted. Tao, C., et al. (2016), Variation of Jupiter's aurora observed by Hisaki/EXCEED: 1. Observed characteristics of the auroral electron energies compared with observations performed using HST/STIS, J. Geophys. Res. Space Physics, 121, doi:10.1002/2015JA021271. To view the published open abstract, go to http://dx.doi.org and enter the DOI.
PY - 2016/5
Y1 - 2016/5
N2 - 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 H2 Lyman and Werner bands at 80–148 nm 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 138.5–144.8 nm to that in the short wavelength range of 126.3–130 nm. 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.
AB - 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 H2 Lyman and Werner bands at 80–148 nm 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 138.5–144.8 nm to that in the short wavelength range of 126.3–130 nm. 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.
U2 - 10.1002/2015JA021271
DO - 10.1002/2015JA021271
M3 - Journal article
VL - 121
SP - 4041
EP - 4054
JO - Journal of Geophysical Research: Space Physics
JF - Journal of Geophysical Research: Space Physics
SN - 2169-9402
IS - 5
ER -