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, 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
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
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| 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 |
| 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 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 |
| WOS记录号 | WOS:000403940100001 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8841]  |
| 专题 | 国家天文台_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 |
| 推荐引用方式 GB/T 7714 | 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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