Solar system planets observed with Suzaku

被引：6

作者：

Ezoe, Yuichiro ^{[1
]}

Ishikawa, Kumi ^{[1
]}

Ohashi, Takaya ^{[1
]}

Yamasaki, Noriko Y. ^{[2
]}

Mitsuda, Kazuhisa ^{[2
]}

Fujimoto, Ryuichi ^{[3
]}

Miyoshi, Yoshizumi ^{[4
]}

Terada, Naoki ^{[5
]}

Uchiyama, Yasunobu ^{[6
]}

Futaana, Yoshifumi ^{[7
]}

机构：

[1] Tokyo Metropolitan Univ, Tokyo 1920397, Japan

[2] Inst Space & Astronaut Sci, Tyuou Ku, Kanagawa 2525210, Japan

[3] Kanazawa Univ, Kanazawa, Ishikawa 9201192, Japan

[4] Nagoya Univ, Solar Terr Environm Lab, Chikusa Ku, Nagoya, Aichi 4648601, Japan

[5] Tohoku Univ, Dept Geophys, Aoba Ku, Sendai, Miyagi 9808578, Japan

[6] Standford Univ, Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA

[7] Swedish Inst Space Phys, S-98128 Kiruna, Sweden

来源：

ADVANCES IN SPACE RESEARCH | 2011年 / 47卷 / 03期

关键词：

X-ray; Solar system objects; Earth; Jupiter; Mars; WIND CHARGE-EXCHANGE; X-RAY-EMISSION; XMM-NEWTON; 1ST OBSERVATION; DISCOVERY; JUPITER; CHANDRA; MARS; OBJECTS; AURORAE;

D O I：

10.1016/j.asr.2010.09.028

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Recent results of solar system planets observed with the Japanese X-ray astronomy satellite Suzaku are reviewed. Thanks to the low instrumental background and good energy resolution, X-ray CCDs onboard Suzaku are one of the best probes to study diffuse X-ray emission. An overview of the Suzaku data of Jupiter and Earth is presented, along with preliminary results of Mars. Firstly, diffuse hard X-ray emission is discovered in 1-5 keV at Jovian radiation belts. Its spectrum is represented by a power-law continuum with a photon index of similar to 1.4. This emission could originate from inverse-Compton scattering of solar photons by tens MeV electrons. Secondly, variable diffuse soft X-rays are serendipitously found during observations in the directions of the north ecliptic pole and galactic ridge. Good time correlations with the solar wind and emission lines found in the X-ray spectra are firm evidences of a solar wind charge exchange emission with Earth's exosphere. Thirdly, diffuse X-ray emission from Martian exosphere via the solar wind charge exchange is investigated for the :first time at solar minimum. A stringent upper limit on the density of the Martian exosphere is placed from the Suzaku data. (C) 2010 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：411 / 418

页数：8

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