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.; Smail, Ian; Wang, Wei-Hao; Riechers, D.; Dunlop, J. S.; Ao, Y.; Bourne, N.; Bunker, A.; Chapman, S. C.; Chen, Chian-Chou |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2017 |
| 卷号 | 844期号:1页码:L10- |
| 英文摘要 | 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 mu m and SCUBA-2/450 mu m 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 (similar to 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 100(-70)(+15) M-circle dot yr(-1), is undetected in the rest-frame ultraviolet but contributes significantly to the lower angular resolution photometry at rest-frame wavelengths greater than or similar to 3500 angstrom. 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 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/17398]  |
| 专题 | 中国科学院紫金山天文台 |
| 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]. ASTROPHYSICAL JOURNAL LETTERS,2017,844(1):L10-. |
| 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.ASTROPHYSICAL JOURNAL LETTERS,844(1),L10-. |
| 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".ASTROPHYSICAL JOURNAL LETTERS 844.1(2017):L10-. |
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来源：紫金山天文台
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