Iron Emission Lines on the Galactic Ridge Observed with Suzaku

被引：36

作者：

Yamauchi, Shigeo ^{[1
]}

Ebisawa, Ken ^{[2
]}

Tanaka, Yasuo ^{[3
]}

Koyama, Katsuji ^{[4
]}

Matsumoto, Hironori ^{[4
]}

Yamasaki, Noriko Y. ^{[2
]}

Takahashi, Hiromitsu ^{[5
]}

Ezo, Yuichiro ^{[6
]}

机构：

[1] Iwate Univ, Fac Humanities & Social Sci, Morioka, Iwate 0208550, Japan

[2] JAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

[3] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[4] Kyoto Univ, Grad Sch Sci, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan

[5] Hiroshima Univ, Sch Sci, Dept Phys Sci, Hiroshima 7398526, Japan

[6] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2009年 / 61卷

基金：

日本学术振兴会;

关键词：

Galaxy: disk; X-rays: diffuse background; X-rays: ISM; X-rays: stars; X-rays: spectra; X-RAY-EMISSION; MAGNETIC CATACLYSMIC VARIABLES; SAGITTARIUS B2 CLOUD; REFLECTION-NEBULA; BOARD SUZAKU; ASCA OBSERVATIONS; POINT SOURCES; PLANE SURVEY; HOT PLASMA; REGION;

D O I：

10.1093/pasj/61.sp1.S225

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In order to elucidate the origin of galactic ridge X-ray emission, we analyzed Suzaku data taken at various regions along the galactic plane, and studied their Fe-K emission line features. Suzaku resolved the Fe line complex into three narrow lines at similar to 6.4 keV, similar to 6.7 keV and similar to 6.97 keV, which are K-lines from neutral (or low-ionized), He-like, and H-like iron respectively. The 6.7 keV line is clearly seen in all of the observed regions, and its longitudinal distribution is consistent with that determined from previous observations. The 6.4 keV emission line was also found in various galactic plane regions (b similar to 0 degrees). Differences in the flux ratios of the 6.4 keV/6.7 keV and 6.97 keV/6.7 keV lines between the galactic plane and the galactic center regions were studied and its implication was discussed.

引用

页码：S225 / S232

页数：8

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