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ALMA [N II] 205 mu m Imaging Spectroscopy of the Interacting Galaxy System BRI 1202-0725 at Redshift 4.7
Lu, Nanyao1,2; Zhao YH(赵应和)3,4,5; Diaz-Santos, Tanio6; Kevin Xu, C.1,2; Charmandaris, Vassilis7,8; Gao, Yu9; van der Werf, Paul P.10; Privon, George C.11,12; Inami, Hanae13; Rigopoulou, Dimitra14; Sanders, David B.15; Zhu, Lei1,2
Contribution Rank第3完成单位
Indexed BySCI
KeywordGalaxies: Active Galaxies: Ism Galaxies: Star Formation Infrared: Galaxies Ism: Molecules Submillimeter: Galaxies

We present the results from Atacama Large Millimeter/submillimeter Array imaging in the [N II] 205 mu m fine-structure line (hereafter [N II]) and the underlying continuum of BRI 1202-0725, an interacting galaxy system at z = 4.7, consisting of a quasi-stellar object (QSO), a submillimeter galaxy (SMG), and two Ly alpha emitters, all within similar to 25 kpc of the QSO. We detect the QSO and SMG in both [N II] and continuum. At the similar to 1 '' (or 6.6 kpc) resolution, both the QSO and SMG are resolved in [N II], with the de-convolved major axes of similar to 9 and similar to 14 kpc, respectively. In contrast, their continuum emissions are much more compact and unresolved even at an enhanced resolution of similar to 0 ''.7. The ratio of the [N II] flux to the existing CO(7-6) flux is used to constrain the dust temperature (T-dust) for a more accurate determination of the FIR luminosity L-FIR. Our best estimated T-dust equals 43 (+/- 2) K for both galaxies (assuming an emissivity index beta = 1.8). The resulting LCO(7-6)/LFIR ratios are statistically consistent with that of local luminous infrared galaxies, confirming that LCO(7-6) traces the star formation (SF) rate (SFR) in these galaxies. We estimate that the ongoing SF of the QSO (SMG) has an SFR of 5.1 (6.9) x 10(3) M-circle dot yr(-1) (+/- 30%) assuming Chabrier initial mass function, takes place within a diameter (at half maximum) of 1.3 (1.5) kpc, and will consume the existing 5 (5) x 10(11) M-circle dot of molecular gas in 10 (7) x 10(7) years.

Funding ProjectNSFC[11673028] ; NSFC[11673057] ; NSFC[11420101002] ; ALMA-CONICYT[31130005] ; FONDECYT[3150361] ; FONDECYT[ST/N000919/1] ; FONDECYT[1151239]
Funding OrganizationNSFC[11673028, 11673057, 11420101002] ; ALMA-CONICYT[31130005] ; FONDECYT[3150361, ST/N000919/1, 1151239]
Subject Area天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
MOST Discipline Catalogue理学 ; 理学::天文学
WOS IDWOS:000403940100001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLuminous Infrared Galaxies ; Warm Molecular Gas ; Star-formation Law ; z Greater-than ; c Ii ; Emission ; Dust ; Z=4.7 ; Quasar ; Radio
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLu, Nanyao
Affiliation1.National Astronomical Observatories, Chinese Academy of Sciences (CAS), Beijing 100012, China
2.China-Chile Joint Center for Astronomy, Camino El Observatorio 1515, Las Condes, Santiago, Chile
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
5.Center for Astronomical Mega-Science, CAS, 20A Datun Road, Chaoyang District, Beijing 100012, China
6.Nucleo de Astronomia de la Facultad de Ingenieria, Universidad Diego Portales, Av. Ejercito Libertador 441, Santiago, Chile
7.Department of Physics, University of Crete, GR-71003 Heraklion, Greece
8.IAASARS, National Observatory of Athens, GR-15236, Penteli, Greece
9.Purple Mountain Observatory, CAS, Nanjing 210008, China
10.Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
11.Departamento de Astronomía, Universidad de Concepción, Casilla 160-C, Concepción, Chile
12.Pontificia Universidad Católica de Chile, Instituto de Astrofisica, Casilla 306, Santiago 22, Chile
13.Centre de Recherche Astrophysique de Lyon (CRAL), Observatoire de Lyon, CNRS, UMR5574, F-69230, Saint-Genis-Laval, France
14.Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, UK
15.University of Hawaii, Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
Recommended Citation
GB/T 7714
Lu, Nanyao,Zhao YH,Diaz-Santos, Tanio,et al. ALMA [N II] 205 mu m Imaging Spectroscopy of the Interacting Galaxy System BRI 1202-0725 at Redshift 4.7[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,842(2).
APA Lu, Nanyao.,Zhao YH.,Diaz-Santos, Tanio.,Kevin Xu, C..,Charmandaris, Vassilis.,...&Zhu, Lei.(2017).ALMA [N II] 205 mu m Imaging Spectroscopy of the Interacting Galaxy System BRI 1202-0725 at Redshift 4.7.ASTROPHYSICAL JOURNAL LETTERS,842(2).
MLA Lu, Nanyao,et al."ALMA [N II] 205 mu m Imaging Spectroscopy of the Interacting Galaxy System BRI 1202-0725 at Redshift 4.7".ASTROPHYSICAL JOURNAL LETTERS 842.2(2017).
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