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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, Yinghe3,4,5; 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
2017-06-20
发表期刊ASTROPHYSICAL JOURNAL LETTERS
卷号842期号:2
摘要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.
文章类型Article
关键词Galaxies: Active Galaxies: Ism Galaxies: Star Formation Infrared: Galaxies Ism: Molecules Submillimeter: Galaxies
WOS标题词Science & Technology ; Physical Sciences
资助者NSFC(11673028 ; NSFC(11673028 ; ALMA-CONICYT(31130005) ; ALMA-CONICYT(31130005) ; FONDECYT(3150361 ; FONDECYT(3150361 ; 11673057 ; 11673057 ; ST/N000919/1 ; ST/N000919/1 ; 11420101002) ; 11420101002) ; 1151239) ; 1151239) ; NSFC(11673028 ; NSFC(11673028 ; ALMA-CONICYT(31130005) ; ALMA-CONICYT(31130005) ; FONDECYT(3150361 ; FONDECYT(3150361 ; 11673057 ; 11673057 ; ST/N000919/1 ; ST/N000919/1 ; 11420101002) ; 11420101002) ; 1151239) ; 1151239)
DOI10.3847/2041-8213/aa77fc
关键词[WOS]LUMINOUS INFRARED GALAXIES ; WARM MOLECULAR GAS ; STAR-FORMATION LAW ; Z GREATER-THAN ; C II ; EMISSION ; DUST ; Z=4.7 ; QUASAR ; RADIO
收录类别SCI
语种英语
资助者NSFC(11673028 ; NSFC(11673028 ; ALMA-CONICYT(31130005) ; ALMA-CONICYT(31130005) ; FONDECYT(3150361 ; FONDECYT(3150361 ; 11673057 ; 11673057 ; ST/N000919/1 ; ST/N000919/1 ; 11420101002) ; 11420101002) ; 1151239) ; 1151239) ; NSFC(11673028 ; NSFC(11673028 ; ALMA-CONICYT(31130005) ; ALMA-CONICYT(31130005) ; FONDECYT(3150361 ; FONDECYT(3150361 ; 11673057 ; 11673057 ; ST/N000919/1 ; ST/N000919/1 ; 11420101002) ; 11420101002) ; 1151239) ; 1151239)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000403940100001
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8841
专题太阳物理研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.China Chile Joint Ctr Astron, Camino El Observ 1515, Santiago, Chile
3.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China
4.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China
5.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China
6.Univ Diego Portales, Fac Ingn, Nucleo Astron, Ave Ejercito Libertador 441, Santiago, Chile
7.Univ Crete, Dept Phys, GR-71003 Iraklion, Greece
8.Natl Observ Athens, IAASARS, GR-15236 Penteli, Greece
9.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
10.Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
11.Univ Concepcion, Dept Astron, Casilla 160-C, Concepcion, Chile
12.Pontificia Univ Catolica Chile, Inst Astrofis, Casilla 306, Santiago 22, Chile
13.CRAL, Observ Lyon, CNRS, UMR5574, F-69230 St Genis Laval, France
14.Univ Oxford, Dept Phys, Keble Rd, Oxford OX1 3RH, England
15.Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA
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Lu, Nanyao,Zhao, Yinghe,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, Yinghe.,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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