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ALMA uncovers the [...
ALMA uncovers the [C II] emission and warm dust continuum in a z=8.31 Lyman break galaxy
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- Bakx, Tom J. L. C. (author)
- Nagoya Univ, Grad Sch Sci, Div Particle & Astrophys Sci, Nagoya, Aichi 4648602, Japan.;Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.
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- Tamura, Yoichi (author)
- Nagoya Univ, Grad Sch Sci, Div Particle & Astrophys Sci, Nagoya, Aichi 4648602, Japan.
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- Hashimoto, Takuya (author)
- Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.;Univ Tsukubu, Fac Pure & Appl Sci, Tomonaga Ctr Hist Universe TCHoU, Tsukuba, Ibaraki 3058571, Japan.;Osaka Sangyo Univ, Fac Design Technol, Dept Environm Sci & Technol, 3-1-1 Nakagaito, Daito, Osaka 5748530, Japan.
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- Inoue, Akio K. (author)
- Waseda Univ, Fac Sci & Engn, Sch Adv Sci & Engn, Dept Phys,Shinjuku Ku, 3-4-1 Okubo, Tokyo 1698555, Japan.;Waseda Univ, Fac Sci & Engn, Waseda Res Inst Sci & Engn, Shinjuku Ku, 3-4-1 Okubo, Tokyo 1698555, Japan.
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- Lee, Minju M. (author)
- Max Planck Inst Extraterrestr Phys MPE, Giessenbachstr, D-85748 Garching, Germany.
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- Mawatari, Ken (author)
- Osaka Sangyo Univ, Fac Design Technol, Dept Environm Sci & Technol, 3-1-1 Nakagaito, Daito, Osaka 5748530, Japan.;Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan.
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- Ota, Kazuaki (author)
- Kyoto Univ, Res Adm Off, Sakyo Ku, Kyoto 6068501, Japan.
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- Umehata, Hideki (author)
- Open Univ Japan, 2-11 Wakaba, Chiba 2618586, Japan.;RIKEN, Cluster Pioneering Res, 2-1 Hirosawa, Wako, Saitama 3510198, Japan.;Univ Tokyo, Grad Sch Sci, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan.
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- Zackrisson, Erik (author)
- Uppsala universitet,Observationell astrofysik
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- Hatsukade, Bunyo (author)
- Univ Tokyo, Grad Sch Sci, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan.
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- Kohno, Kotaro (author)
- Univ Tokyo, Grad Sch Sci, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan.;Univ Tokyo, Grad Sch Sci, Res Ctr Early Universe, Tokyo 1130033, Japan.
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- Matsuda, Yuichi (author)
- Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.;Grad Univ Adv Studies SOKENDAI, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.
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- Matsuo, Hiroshi (author)
- Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.;Grad Univ Adv Studies SOKENDAI, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.
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- Okamoto, Takashi (author)
- Hokkaido Univ, Fac Sci, Kita Ku, N10 W8, Sapporo, Hokkaido 0600810, Japan.
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- Shibuya, Takatoshi (author)
- Kitami Inst Technol, 165 Koen Cho, Kitami, Hokkaido 0908507, Japan.
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- Shimizu, Ikkoh (author)
- Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.
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- Taniguchi, Yoshiaki (author)
- Kyoto Univ, Res Adm Off, Sakyo Ku, Kyoto 6068501, Japan.
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- Yoshida, Naoki (author)
- Univ Tokyo, Grad Sch Sci, Dept Phys, Tokyo 1130033, Japan.;Univ Tokyo, Todai Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan.
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Nagoya Univ, Grad Sch Sci, Div Particle & Astrophys Sci, Nagoya, Aichi 4648602, Japan;Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan. Nagoya Univ, Grad Sch Sci, Div Particle & Astrophys Sci, Nagoya, Aichi 4648602, Japan. (creator_code:org_t)
- 2020-03-05
- 2020
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 493:3, s. 4294-4307
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- We report on the detection of the [C II] 157.7 mu m 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 mu m (from previous campaigns) to [CII] 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 mu m dust emission (90 mu m 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 mu m rest frame) down to 18 mu Jy (3 sigma). This non-detection places a strong limits on the dust spectrum, considering the 137 +/- 26 mu Jy continuum emission at 850 mu m. This suggests an unusually warm dust component (T > 80 K, 90 per cent confidence limit), and/or a steep dust-emissivity index (beta(dust) > 2), compared to galaxy-wide dust emission found at lower redshifts (typically T similar to 30-50 K, beta(dust) similar to 1-2). If such temperatures are common, thiswould 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- galaxies: formation
- galaxies: high-redshift
- galaxies: ISM
Publication and Content Type
- ref (subject category)
- art (subject category)
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Bakx, Tom J. L. ...
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Tamura, Yoichi
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Hashimoto, Takuy ...
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Inoue, Akio K.
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Lee, Minju M.
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Mawatari, Ken
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Ota, Kazuaki
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Umehata, Hideki
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Zackrisson, Erik
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Hatsukade, Bunyo
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Kohno, Kotaro
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Matsuda, Yuichi
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Matsuo, Hiroshi
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Okamoto, Takashi
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Shibuya, Takatos ...
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Shimizu, Ikkoh
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Taniguchi, Yoshi ...
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Yoshida, Naoki
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Uppsala University