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Big Three Dragons: A z=7.15 Lyman-break galaxy detected in [Oiii] 88 mu m, [Cii] 158 mu m, and dust continuum with ALMA
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- Hashimoto, Takuya (författare)
- Waseda University,National Astronomical Observatory of Japan,Osaka Sangyo University,Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, 3-4-1 Okubo, Tokyo 1698555, Japan;Osaka Sangyo Univ, Fac Design Technol, Dept Environm Sci & Technol, 3-1-1 Nagaito, Daito, Osaka 5748530, Japan;Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
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- Inoue, Akio K. (författare)
- Osaka Sangyo University,Osaka Sangyo Univ, Fac Design Technol, Dept Environm Sci & Technol, 3-1-1 Nagaito, Daito, Osaka 5748530, Japan,Univ Tokyo, Grad Sch Sci, Inst Astron, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan;Univ Tokyo, Grad Sch Sci, Res Ctr Early Universe, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
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- Mawatari, Ken (författare)
- University of Tokyo, Japan,Osaka Sangyo University,Osaka Sangyo Univ, Fac Design Technol, Dept Environm Sci & Technol, 3-1-1 Nagaito, Daito, Osaka 5748530, Japan;Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan
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- Tamura, Yoichi (författare)
- Nagoya University,Nagoya Univ, Grad Sch Sci, Div Particle & Astrophys Sci, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan
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- Matsuo, Hiroshi (författare)
- The Graduate University for Advanced Studies (SOKENDAI),National Astronomical Observatory of Japan,Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan;Grad Univ Adv Studies SOKENDAI, Sch Phys Sci, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
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- Furusawa, Hisanori (författare)
- National Astronomical Observatory of Japan,Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
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- Harikane, Yuichi (författare)
- University of Tokyo, Japan,Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan;Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
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- Shibuya, Takatoshi (författare)
- Kitami Institute of Technology,Kitami Inst Technol, Dept Comp Sci, 165 Koen Cho, Kitami, Hokkaido 0908507, Japan
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- Knudsen, Kirsten Kraiberg, 1976 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Onsala Space Observ, Dept Space Earth & Environm, SE-43992 Onsala, Sweden
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- Kohno, Kotaro (författare)
- University of Tokyo, Japan
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- Ono, Yoshiaki (författare)
- University of Tokyo, Japan,Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan
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- Zackrisson, Erik (författare)
- Uppsala universitet,Observationell astrofysik
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- Okamoto, Takashi (författare)
- Hokakido Univ, Grad Sch Sci, Dept Cosmosci, Kita Ku, N10 W8, Sapporo, Hokkaido 0600810, Japan
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- Kashikawa, Nobunari (författare)
- University of Tokyo, Japan,National Astronomical Observatory of Japan,The Graduate University for Advanced Studies (SOKENDAI),Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan;Grad Univ Adv Studies SOKENDAI, Sch Phys Sci, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan;Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
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- Oesch, Pascal A. (författare)
- Université de Genève,University of Geneva,Univ Geneva, Geneva Observ, Ch Maillettes 51, CH-1290 Versoix, Switzerland
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- Ouchi, Masami (författare)
- University of Tokyo, Japan,Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan;Univ Tokyo, Todai Inst Adv Study, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan
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- Ota, Kazuaki (författare)
- Kyoto University,Kyoto Univ, Res Adm Off, Sakyo Ku, Kyoto, Kyoto 6068501, Japan
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- Shimizu, Ikkoh (författare)
- Osaka University,Osaka Univ, Dept Earth & Space Sci, Theoret Astrophys, 1-1 Machikaneyama, Toyonaka, Osaka 5600043, Japan
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- Taniguchi, Yoshiaki (författare)
- The Open University of Japan,Open Univ Japan, Mihama Ku, 2-11 Wakaba, Chiba, Chiba 2618586, Japan
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- Umehata, Hideki (författare)
- The Open University of Japan,RIKEN,Open Univ Japan, Mihama Ku, 2-11 Wakaba, Chiba, Chiba 2618586, Japan;RIKEN Cluster Pioneering Res, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
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- Watson, Darach (författare)
- Köpenhamns universitet,University of Copenhagen,Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, Lyngbyvej 2,4 Sal, DK-2100 Copenhagen, Denmark
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(creator_code:org_t)
- 2019-06-17
- 2019
- Engelska.
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Ingår i: Publication of the Astronomical Society of Japan. - : Oxford University Press (OUP). - 2053-051X .- 0004-6264. ; 71:4
- Relaterad länk:
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https://academic.oup...
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https://research.cha...
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https://research.cha...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We present new ALMA observations and physical properties of a Lyman break galaxy at z = 7.15. Our target, B14-65666, has a bright ultra-violet (UV) absolute magnitude, M-UV approximate to -22.4, and has been spectroscopically identified in Ly alpha with a small rest-frame equivalent width of approximate to 4 angstrom. A previous Hubble Space TElescope (HST) image has shown that the target is composed of two spatially separated clumps in the rest-frame UV. With ALMA, we have newly detected spatially resolved [Oiii] 88 mu m, [Cii] 158 mu m, and their underlying dust continuum emission. In the whole system of B14-65666, the [Oiii] and [Cii] lines have consistent redshifts of 7.1520 +/- 0.0003, and the [Oiii] luminosity, (34.4 +/- 4.1)x 10(8)L(circle dot), is about three times higher than the [Cii] luminosity, (11.0 +/- 1.4) x 10(8)L(circle dot). With our two continuum flux densities, the dust temperature is constrained to be T-d approximate to 50-60K under the assumption of a dust emissivity index of beta(d) = 2.0-1.5, leading to a large total infrared luminosity of L-TIR approximate to 1 x 10(12)L(circle dot). Owing to our high spatial resolution data, we show that the [Oiii] and [Cii] emission can be spatially decomposed into two clumps associated with the two rest-frame UV clumps whose spectra are kinematically separated by approximate to 200kms(-1). We also find these two clumps have comparable UV, infrared, [Oiii], and [Cii] luminosities. Based on these results, we argue that B14-65666 is a starburst galaxy induced by a major merger. The merger interpretation is also supported by the large specific star formation rate (defined as the star formation rate per unit stellar mass), sSFR Gyr(-1), inferred from our SED fitting. Probably, a strong UV radiation field caused by intense star formation contributes to its high dust temperature and the [Oiii]-to-[Cii] luminosity ratio.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- galaxies: high-redshift
- galaxies: formation
- galaxies: ISM
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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- Av författaren/redakt...
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Hashimoto, Takuy ...
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Inoue, Akio K.
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Mawatari, Ken
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Tamura, Yoichi
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Matsuo, Hiroshi
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Furusawa, Hisano ...
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Harikane, Yuichi
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Shibuya, Takatos ...
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Knudsen, Kirsten ...
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Kohno, Kotaro
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Ono, Yoshiaki
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Zackrisson, Erik
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Okamoto, Takashi
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Kashikawa, Nobun ...
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Oesch, Pascal A.
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Ouchi, Masami
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Ota, Kazuaki
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Shimizu, Ikkoh
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Taniguchi, Yoshi ...
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Umehata, Hideki
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Watson, Darach
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Chalmers tekniska högskola
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Uppsala universitet