铃朔观测螺旋星系 NGC 6946 中的铁 K 壳线

IF 2.2 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Publications of the Astronomical Society of Japan Pub Date : 2024-05-07 DOI:10.1093/pasj/psae028

Shigeo Yamauchi, Azusa Inaba, Yumiko Anraku

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引用次数: 0

摘要

6.7keV的发射线可归因于类He铁K壳转变，这表明存在一个温度为几keV的薄热等离子体。我们利用 "铃作 "的档案数据搜索了来自旋涡星系NGC 6946的铁K线，在中央$r\le {2.^{\prime }5}$ 区域的3.1σ电平上发现了6.68 ± 0.07 keV的铁K线。在 5.5 Mpc 的距离上，中心区域的铁线光度估计为 (2.3 ± 1.2) × 1037 erg s-1。讨论了铁发射线的起源。

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

An emission line at ∼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 3.1σ level in the central $r\le {2.^{\prime }5}$ region. The iron line luminosity from the central region was estimated to be (2.3 ± 1.2) × 1037 erg s−1 at a distance of 5.5 Mpc. The origin of the iron emission line is discussed.

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来源期刊

Publications of the Astronomical Society of Japan 地学天文-天文与天体物理

CiteScore

4.10

自引率

13.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Publications of the Astronomical Society of Japan (PASJ) publishes the results of original research in all aspects of astronomy, astrophysics, and fields closely related to them.