An Imperfectly Passive Nature: Bright Submillimeter Emission from Dust-obscured Star Formation in the z?=?3.717 “Passive” System, ZF 20115
文献类型：期刊论文
| 作者 | Simpson,J. M.1; Smail,Ian2; Wang,Wei-Hao1; Riechers,D.3; Dunlop,J. S.4; Ao,Y.5; Bourne,N.4; Bunker,A.6; Chapman,S. C.7; Chen,Chian-Chou8 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2017-07-19 |
| 卷号 | 844期号:1 |
| 关键词 | galaxies: high-redshift galaxies: starburst |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/aa7cf2 |
| 英文摘要 | Abstract The identification of high-redshift, massive galaxies with old stellar populations may pose challenges to some models of galaxy formation. However, to securely classify a galaxy as quiescent, it is necessary to exclude significant ongoing star formation, something that can be challenging to achieve at high redshifts. In this Letter, we analyze deep ALMA/870 μm and SCUBA-2/450 μm imaging of the claimed “post-starburst” galaxy ZF 20115 at z?=?3.717 that exhibits a strong Balmer break and absorption lines. The rest-frame far-infrared imaging identifies a luminous starburst 0.″4 ± 0.″1 (～3 kpc in projection) from the position of the ultraviolet/optical emission and is consistent with lying at the redshift of ZF 20115. The star-forming component, with an obscured star formation rate of , is undetected in the rest-frame ultraviolet but contributes significantly to the lower angular resolution photometry at rest-frame wavelengths ?3500 ?. This contribution from the obscured starburst, especially in the Spitzer/IRAC wavebands, significantly complicates the determination of a reliable stellar mass for the ZF 20015 system, and we conclude that this source does not pose a challenge to current models of galaxy formation. The multi-wavelength observations of ZF 20115 unveil a complex system with an intricate and spatially varying star formation history. ZF 20115 demonstrates that understanding high-redshift obscured starbursts will only be possible with multi-wavelength studies that include high-resolution observations, available with the James Webb Space Telescope, at mid-infrared wavelengths. |
| 语种 | 英语 |
| WOS记录号 | IOP:2041-8205-844-1-AA7CF2 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23860]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.Academia Sinica Institute of Astronomy and Astrophysics, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; jsimpson@asiaa.sinica.edu.tw 2.Centre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham DH1 3LE, UK 3.Department of Astronomy, Cornell University, 220 Space Sciences Building, Ithaca, NY 14853, USA 4.Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford HIll, Edinburgh EH9 3HJ, UK 5.National Astronomical Observatory of Japan (NAOJ), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan 6.Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK 7.Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 3J5, Canada 8.European Southern Observatory, Karl Schwarzschild Strasse 2, Garching, Germany 9.Instituto de Astrofisica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spain 10.Universidad de La Laguna, Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain |
| 推荐引用方式 GB/T 7714 | Simpson,J. M.,Smail,Ian,Wang,Wei-Hao,et al. An Imperfectly Passive Nature: Bright Submillimeter Emission from Dust-obscured Star Formation in the z?=?3.717 “Passive” System, ZF 20115[J]. The Astrophysical Journal Letters,2017,844(1). |
| APA | Simpson,J. M..,Smail,Ian.,Wang,Wei-Hao.,Riechers,D..,Dunlop,J. S..,...&Zheng,X. Z..(2017).An Imperfectly Passive Nature: Bright Submillimeter Emission from Dust-obscured Star Formation in the z?=?3.717 “Passive” System, ZF 20115.The Astrophysical Journal Letters,844(1). |
| MLA | Simpson,J. M.,et al."An Imperfectly Passive Nature: Bright Submillimeter Emission from Dust-obscured Star Formation in the z?=?3.717 “Passive” System, ZF 20115".The Astrophysical Journal Letters 844.1(2017). |
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