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A low [CII]/[NII] ratio in the center of a massive galaxy at z=3.7: evidence for a transition to quiescence at high redshift
Schreiber, C.1; Glazebrook, K.2; Papovich, C.3; Diaz-Santos, T.4,16,17; Verma, A.1; Elbaz, D.5; Kacprzak, G. G.2; Nanayakkara, T.6; Oesch, P.7,18; Pannella, M.8; Spitler, L.9,10; Straatman, C.11; Tran, K-, V12,13; Wang, T.14,15
2021-02-09
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume646Pages:15
AbstractUnderstanding the process of quenching is one of the major open questions in galaxy evolution and crucial insights may be obtained by studying quenched galaxies at high redshifts at epochs when the Universe and the galaxies were younger and simpler to model. However, establishing the degree of quiescence in high-redshift galaxies is a challenging task. One notable example is Hyde, a recently discovered galaxy at z(spec)=3.709. Equally as compact (r(1/2)similar to 0.5 kpc) and massive (M-*similar to 10(11) M-circle dot) as its quenched neighbor Jekyll, it is also extremely obscured yet only moderately luminous in the sub-millimeter. Panchromatic modeling has suggested it could be the first galaxy found in transition to quenching at z> 3, however, the data are also consistent with a broad range of star-formation activity, from fully quenched to moderate star-formation rates (SFR) in the lower scatter of the galaxy main-sequence. Here, we describe Atacama Large Millimeter Array observations of the [CII] 157 mu m and [NII] 205 mu m far-infrared emission lines. The [CII] emission within the half-light radius is dominated by ionized gas, while the outskirts are dominated by photo-dissociation regions or neutral gas. This suggests that the ionization in the center is not primarily powered by ongoing star formation, and is instead coming from remnant stellar populations formed in an older burst or from a moderate active galactic nucleus . Accounting for this information in the multi-wavelength modeling provides a tighter constraint on the star formation rate of SFR = 50(-18)(+24)M(circle dot) yr(-1) SFR = 50 - 18 + 24 M circle dot yr(-1). This rules out fully quenched solutions and favors SFRs more than factor of two lower than expected for a main-sequence galaxy, confirming the nature of Hyde as a transition galaxy. These results suggest that quenching happens from inside-out and starts before the galaxy expels or consumes all its gas reservoirs. Similar observations of a sample of massive and obscured galaxies would determine whether this is an isolated case or the norm for quenching at high redshift.
Keywordgalaxies: evolution galaxies: high-redshift galaxies: star formation submillimeter: galaxies
Funding OrganizationAustralian Research Council ; Australian Research Council ; CASSACA ; CASSACA ; CONICYT ; CONICYT ; Australian Research Council ; Australian Research Council ; CASSACA ; CASSACA ; CONICYT ; CONICYT ; Australian Research Council ; Australian Research Council ; CASSACA ; CASSACA ; CONICYT ; CONICYT ; Australian Research Council ; Australian Research Council ; CASSACA ; CASSACA ; CONICYT ; CONICYT
DOI10.1051/0004-6361/201936460
WOS KeywordSTAR-FORMATION ; SIMPLE-MODEL ; DUST CONTENT ; STELLAR ; ULTRAVIOLET ; POPULATION
Language英语
Funding ProjectAustralian Research Council[DP170103470] ; CASSACA ; CONICYT
Funding OrganizationAustralian Research Council ; Australian Research Council ; CASSACA ; CASSACA ; CONICYT ; CONICYT ; Australian Research Council ; Australian Research Council ; CASSACA ; CASSACA ; CONICYT ; CONICYT ; Australian Research Council ; Australian Research Council ; CASSACA ; CASSACA ; CONICYT ; CONICYT ; Australian Research Council ; Australian Research Council ; CASSACA ; CASSACA ; CONICYT ; CONICYT
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000617641400003
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/78924
Collection中国科学院国家天文台
Corresponding AuthorSchreiber, C.
Affiliation1.Dept Phys, Astrophys, Keble Rd, Oxford OX1 3RH, England
2.Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia
3.Texas A&M Univ, George P & Cynthia W Mitchell Inst Fundamental Ph, Dept Phys & Astron, College Stn, TX 77843 USA
4.Univ Diego Portales, Fac Ingn & Ciencias, Nucleo Astron, Ejercito Libertador 441, Santiago 8320000, Chile
5.Univ Paris Diderot, CEA Saclay, AIM Paris Saclay, CEA,DSM,Irfu,CNRS, Pt Courrier 131, F-91191 Gif Sur Yvette, France
6.Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands
7.Univ Geneva, Dept Astron, 51 Ch Maillettes, CH-1290 Versoix, Switzerland
8.Ludwig Maximilians Univ Munchen, Fac Phys, Scheinerstr 1, D-81679 Munich, Germany
9.Macquarie Univ, Res Ctr Astron Astrophys & Astrophoton, Sydney, NSW 2109, Australia
10.Macquarie Univ, Dept Phys & Astron, Sydney, NSW 2109, Australia
11.Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
12.CSIRO Astron & Space Sci, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia
13.Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia
14.Univ Tokyo, Inst Astron, Mitaka, Tokyo 1810015, Japan
15.Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan
16.Chinese Acad Sci, Natl Astron Observ, Chinese Acad Sci South Amer Ctr Astron CASSACA, Beijing 100101, Peoples R China
17.Fdn Res & Technol Hellas FORTH, Inst Astrophys, Iraklion 70013, Greece
18.Cosm Dawn Ctr DAWN, Copenhagen, Denmark
Recommended Citation
GB/T 7714
Schreiber, C.,Glazebrook, K.,Papovich, C.,et al. A low [CII]/[NII] ratio in the center of a massive galaxy at z=3.7: evidence for a transition to quiescence at high redshift[J]. ASTRONOMY & ASTROPHYSICS,2021,646:15.
APA Schreiber, C..,Glazebrook, K..,Papovich, C..,Diaz-Santos, T..,Verma, A..,...&Wang, T..(2021).A low [CII]/[NII] ratio in the center of a massive galaxy at z=3.7: evidence for a transition to quiescence at high redshift.ASTRONOMY & ASTROPHYSICS,646,15.
MLA Schreiber, C.,et al."A low [CII]/[NII] ratio in the center of a massive galaxy at z=3.7: evidence for a transition to quiescence at high redshift".ASTRONOMY & ASTROPHYSICS 646(2021):15.
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