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ALMA uncovers the [C ii] emission and warm dust continuum in a z = 8.31 Lyman break galaxy
http://hdl.handle.net/2237/00032530
http://hdl.handle.net/2237/000325302d1dee54-b780-4179-aa8f-36eddf2ce598
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
staa509 (2.1 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2020-07-31 | |||||
| タイトル | ||||||
| タイトル | ALMA uncovers the [C ii] emission and warm dust continuum in a z = 8.31 Lyman break galaxy | |||||
| 言語 | en | |||||
| 著者 |
Bakx, Tom J L C
× Bakx, Tom J L C× Tamura, Yoichi× Hashimoto, Takuya× Inoue, Akio K× Lee, Minju M× Mawatari, Ken× Ota, Kazuaki× Umehata, Hideki× Zackrisson, Erik× Hatsukade, Bunyo× Kohno, Kotaro× Matsuda, Yuichi× Matsuo, Hiroshi× Okamoto, Takashi× Shibuya, Takatoshi× Shimizu, Ikkoh× Taniguchi, Yoshiaki× Yoshida, Naoki |
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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 | This article has been accepted for publication in [Monthly Notices of the Royal Astronomical Society] ©: [2020] [authors] Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | galaxies: formation | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | galaxies: high-redshift | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | galaxies: ISM | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We report on the detection of the [C ii] 157.7 μm emission from the Lyman break galaxy (LBG) MACS0416_Y1 at z = 8.3113, by using the Atacama Large Millimeter/submillimeter Array (ALMA). The luminosity ratio of [O iii] 88 μm (from previous campaigns) to [C ii] is 9.3 ± 2.6, indicative of hard interstellar radiation fields and/or a low covering fraction of photodissociation regions. The emission of [C ii] is cospatial to the 850 μm dust emission (90 μm rest frame, from previous campaigns), however the peak [C ii] emission does not agree with the peak [O iii] emission, suggesting that the lines originate from different conditions in the interstellar medium. We fail to detect continuum emission at 1.5 mm (160 μm rest frame) down to 18 μJy (3σ). This non-detection places a strong limits on the dust spectrum, considering the 137 ± 26 μJy continuum emission at 850 μm. This suggests an unusually warm dust component (T > 80 K, 90 per cent confidence limit), and/or a steep dust-emissivity index (βdust > 2), compared to galaxy-wide dust emission found at lower redshifts (typically T ∼ 30–50 K, βdust ∼ 1–2). If such temperatures are common, this would reduce the required dust mass and relax the dust production problem at the highest redshifts. We therefore warn against the use of only single-wavelength information to derive physical properties, recommend a more thorough examination of dust temperatures in the early Universe, and stress the need for instrumentation that probes the peak of warm dust in the Epoch of Reionization. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | Oxford University Press | |||||
| 言語 | en | |||||
| 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/10.1093/mnras/staa509 | |||||
| ISSN（print） | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0035-8711 | |||||
| 書誌情報 |
en : Monthly Notices of the Royal Astronomical Society 巻 493, 号 3, p. 4294-4307, 発行日 2020-04 |
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| 著者版フラグ | ||||||
| 値 | publisher | |||||
