Suzaku observation of an iron K-shell line in the spiral galaxy NGC 6946

被引：0

作者：

Yamauchi, Shigeo ^{[1
]}

Inaba, Azusa ^{[1
]}

Anraku, Yumiko ^{[1
]}

机构：

[1] Nara Womens Univ, Fac Sci, Kitauoyanishimachi, Nara, Nara 6308506, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2024年 / 76卷 / 03期

基金：

日本学术振兴会;

关键词：

galaxies: individual (NGC 6946); X-rays: galaxies; X-rays: ISM; X-RAY-EMISSION; SUPERNOVA-REMNANTS; GALACTIC-RIDGE; RECONNECTION; CATALOG; COMPLEX; BINARY; ORIGIN; REGION; ASCA;

D O I：

10.1093/pasj/psae028

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An emission line at similar to 6.7 keV is attributable to an He-like iron K-shell transition, which indicates existence of a thin thermal plasma with a temperature of several keV. Using Suzaku archival data, we searched for the iron K-line from the spiral galaxy NGC 6946, and found it at 6.68 +/- 0.07 keV at the 3.1 sigma level in the central r <= 2'.5 region. The iron line luminosity from the central region was estimated to be (2.3 +/- 1.2) x 10(37) erg s(-1) at a distance of 5.5 Mpc. The origin of the iron emission line is discussed.

引用

页码：523 / 527

页数：5

共 50 条

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