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ALMA CO Observations of Supernova Remnant N63A in the Large Magellanic Cloud: Discovery of Dense Molecular Clouds Embedded within Shock-ionized and Photoionized Nebulae
http://hdl.handle.net/2237/00030428
http://hdl.handle.net/2237/00030428a31c13f2-b03d-4672-97e5-e347e0fa15ec
名前 / ファイル | ライセンス | アクション |
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Sano_2019_ApJ_873_40 (9.3 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-06-13 | |||||
タイトル | ||||||
タイトル | ALMA CO Observations of Supernova Remnant N63A in the Large Magellanic Cloud: Discovery of Dense Molecular Clouds Embedded within Shock-ionized and Photoionized Nebulae | |||||
言語 | en | |||||
著者 |
Sano, H.
× Sano, H.× Matsumura, H.× Nagaya, T.× Yamane, Y.× Alsaberi, R. Z. E.× Filipović, M. D.× Tachihara, K.× Fujii, K.× Tokuda, K.× Tsuge, K.× Yoshiike, S.× Onishi, T.× Kawamura, A.× Minamidani, T.× Mizuno, N.× Yamamoto, H.× Inutsuka, S.× Inoue, T.× Maxted, N.× Rowell, G.× Sasaki, M.× Fukui, Y. |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | © 2019. The American Astronomical Society | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | cosmic rays | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ISM: clouds | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ISM: individual objects (LHA 120-N 63A) | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ISM: supernova remnants | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | photon-dominated region (PDR) | |||||
抄録 | ||||||
内容記述 | We carried out new 12CO(J = 1–0, 3–2) observations of a N63A supernova remnant (SNR) from the LMC using the Atacama Large Millimeter/submillimeter Array (ALMA) and Atacama Submillimeter Telescope Experiment. We find three giant molecular clouds toward the northeast, east, and near the center of the SNR. Using the ALMA data, we spatially resolved clumpy molecular clouds embedded within the optical nebulae in both the shock-ionized and photoionized lobes discovered by previous Hα and [S ii] observations. The total mass of the molecular clouds is ~800 M ☉ for the shock-ionized region and ~1700 M ☉ for the photoionized region. Spatially resolved X-ray spectroscopy reveals that the absorbing column densities toward the molecular clouds are ~(1.5–6.0) × 10^21 cm^−2, which are ~1.5–15 times less than the averaged interstellar proton column densities for each region. This means that the X-rays are produced not only behind the molecular clouds, but also in front of them. We conclude that the dense molecular clouds have been completely engulfed by the shock waves, but have still survived erosion owing to their high density and short interacting time. The X-ray spectrum toward the gas clumps is well explained by an absorbed power-law model or a high-temperature plasma model, in addition to thermal plasma components, implying that the shock-cloud interaction is efficiently working for both cases through the shock ionization and magnetic field amplification. If the hadronic gamma-ray is dominant in the GeV band, the total energy of the cosmic-ray protons is calculated to be ~(0.3–1.4) × 10^49 erg, with an estimated interstellar proton density of ~190±90cm^−3, containing both the shock-ionized gas and neutral atomic hydrogen. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | IOP publishing | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.3847/1538-4357/ab02fd | |||||
ISSN(print) | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 1538-4357 | |||||
書誌情報 |
en : The Astrophysical Journal 巻 873, 号 1, p. 40, 発行日 2019-03 |
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著者版フラグ | ||||||
値 | publisher |