An Imperfectly Passive Nature: Bright Submillimeter Emission from Dust-obscured Star Formation in the z=3.717 "Passive" System, ZF 20115
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; Dannerbauer, H.9,10; Geach, J. E.11; Goto, T.12; Harrison, C. M.8; Hwang, H. S.12; Ivison, R. J.4,8; Kodama, Tadayuki5; Lee, C. -H.14; Lee, H. -M.15; Lee, M.5,16; Lim, C. -F.1; Michalowski, M. J.4,17; Rosario, D. J.2; Shim, H.18; Shu, X. W.19; Swinbank, A. M.2; Tee, W. -L.1,20; Toba, Y.1; Valiante, E.21; Wang, Junxian22; Zheng, X. Z.23
Corresponding AuthorSimpson, J. M.(
AbstractThe 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.
Keywordgalaxies: high-redshift galaxies: starburst
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000406027700003
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorSimpson, J. M.
Affiliation1.Acad Sinica, Inst Astron & Astrophys, 1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan
2.Univ Durham, Dept Phys, Ctr Extragalact Astron, South Rd, Durham DH1 3LE, England
3.Cornell Univ, Dept Astron, 220 Space Sci Bldg, Ithaca, NY 14853 USA
4.Univ Edinburgh, Inst Astron, Royal Observ, Blackford HIll, Edinburgh EH9 3HJ, Midlothian, Scotland
5.NAOJ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
6.Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England
7.Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada
8.European Southern Observ, Karl Schwarzschild Str 2, Garching, Germany
9.IAC, E-38205 Tenerife, Spain
10.Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain
11.Univ Hertfordshire, Sci & Technol Res Inst, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England
12.Natl Tsing Hua Univ, Inst Astron, 101,Sect 2,Kuang Fu Rd, Hsinchu 30013, Taiwan
13.Korea Inst Adv Study, Sch Phys, 85 Hoegiro, Seoul 02455, South Korea
14.Natl Astron Observ Japan, Subaru Telescope, 650 N Aohoku Pl, Hilo, HI 96720 USA
15.Seoul Natl Univ, Dept Phys & Astron, 1 Gwanak Ro, Seoul 08826, South Korea
16.Univ Tokyo, Dept Astron, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1330033, Japan
17.Adam Mickiewicz Univ, Fac Phys, Astron Observ Inst, Ul Sloneczna 36, PL-60286 Poznan, Poland
18.Kyungpook Natl Univ, Dept Sci Educ, 80 Daehakto, Daegu 41566, South Korea
19.Anhui Normal Univ, Dept Phys, Wuhu 241000, Anhui, Peoples R China
20.Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan
21.Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, S Glam, Wales
22.Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China
23.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
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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):5.
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),5.
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):5.
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