Suzaku observation of an iron K-shell line in the spiral galaxy NGC 6946
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| Format: | Preprint |
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2024
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| _version_ | 1866911813432508416 |
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| author | Yamauchi, Shigeo Inaba, Azusa Anraku, Yumiko |
| author_facet | Yamauchi, Shigeo Inaba, Azusa Anraku, Yumiko |
| contents | An emission line at ~6.7 keV is attributable to a 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 the iron K-line 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)x10^{37} erg s^{-1} at a distance of 5.5 Mpc. The origin of the iron emission line is discussed. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2403_17300 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Suzaku observation of an iron K-shell line in the spiral galaxy NGC 6946 Yamauchi, Shigeo Inaba, Azusa Anraku, Yumiko High Energy Astrophysical Phenomena An emission line at ~6.7 keV is attributable to a 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 the iron K-line 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)x10^{37} erg s^{-1} at a distance of 5.5 Mpc. The origin of the iron emission line is discussed. |
| title | Suzaku observation of an iron K-shell line in the spiral galaxy NGC 6946 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2403.17300 |