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ALMA [N II] 205 mu m Imaging Spectroscopy of the Interacting Galaxy System BRI 1202-0725 at Redshift 4.7

文献类型：期刊论文

作者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
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2017-06-20
卷号842期号:2
关键词Galaxies: Active Galaxies: Ism Galaxies: Star Formation Infrared: Galaxies Ism: Molecules Submillimeter: Galaxies
ISSN号2041-8205
DOI10.3847/2041-8213/aa77fc
产权排序第3完成单位
文献子类Article
英文摘要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.
学科主题天文学
URL标识查看原文
WOS关键词LUMINOUS INFRARED GALAXIES ; WARM MOLECULAR GAS ; STAR-FORMATION LAW ; Z GREATER-THAN ; C II ; EMISSION ; DUST ; Z=4.7 ; QUASAR ; RADIO
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000403940100001
资助机构NSFC(11673028, 11673057, 11420101002) ; ALMA-CONICYT(31130005) ; FONDECYT(3150361, ST/N000919/1, 1151239)
源URL[http://ir.ynao.ac.cn/handle/114a53/10148]  
专题云南天文台_丽江天文观测站（南方基地）
云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Lu, Nanyao(Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China)
作者单位1.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
推荐引用方式
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.,...&Lu, Nanyao.(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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