CO, H2O, H2O+ line and dust emission in a z=3.63 strongly lensed starburst merger at sub-kiloparsec scales
文献类型：期刊论文
| 作者 | Yang, C.1; Gavazzi, R.2; Beelen, A.3; Cox, P.2; Omont, A.2; Lehnert, M. D.2; Gao, Y.4 ; Ivison, R. J.5,6; Swinbank, A. M.7; Barcos-Munoz, L.8,9
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2019-04-26 |
| 卷号 | 624页码:23 |
| 关键词 | galaxies: high-redshift galaxies: ISM gravitational lensing: strong submillimeter: galaxies radio lines: ISM ISM: molecules |
| ISSN号 | 1432-0746 |
| DOI | 10.1051/0004-6361/201833876 |
| 通讯作者 | Yang, C.(cyang@eso.org) |
| 英文摘要 | Using the Atacama Large Millimeter/submillimeter Array (ALMA), we report high angular-resolution observations of the redshift z = 3.63 galaxy H-ATLAS J083051.0 + 013224 (G09v1.97), one of the most luminous strongly lensed galaxies discovered by the Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS). We present 0 ''.2-0 ''.4 resolution images of the rest-frame 188 and 419 mu m dust continuum and the CO(6-5), H2O(2(11)-2(02)), and J(up) = 2H(2)O(+) line emission. We also report the detection of (H2O)-O-18(2(11)-2(02)) in this source. The dust continuum and molecular gas emission are resolved into a nearly complete similar to 1 ''.5 diameter Einstein ring plus a weaker image in the center, which is caused by a special dual deflector lensing configuration. The observed line profiles of the CO(6-5), H2O(2(11)-2(02)), and J(up) = 2H(2)O(+) lines are strikingly similar. In the source plane, we reconstruct the dust continuum images and the spectral cubes of the CO, H2O, and H2O+ line emission at sub-kiloparsec scales. The reconstructed dust emission in the source plane is dominated by a compact disk with an effective radius of 0.7 +/- 0.1 kpc plus an overlapping extended disk with a radius twice as large. While the average magnification for the dust continuum is mu similar to 10-11, the magnification of the line emission varies from 5 to 22 across different velocity components. The line emission of CO(6-5), H2O(2(11)-2(02)), and H2O+ have similar spatial and kinematic distributions. The molecular gas and dust content reveal that G09v1.97 is a gas-rich major merger in its pre-coalescence phase, with a total molecular gas mass of similar to 10(11) M-circle dot Both of the merging companions are intrinsically ultra-luminous infrared galaxies (ULIRGs) with infrared luminosities L-IR reaching greater than or similar to 4 x 10(12) L-circle dot, and the total L-IR of G09v1.97 is (1.4 +/- 0.7) x 10(13) L-circle dot. The approaching southern galaxy (dominating from V = -400 to -150 km s(-1) relative to the systemic velocity) shows no obvious kinematic structure with a semi-major half-light radius of a(s) = 0.4 kpc, while the receding galaxy (0 to 350 km s(-1)) resembles an a(s) = 1.2 kpc rotating disk. The two galaxies are separated by a projected distance of 1.3 kpc, bridged by weak line emission (150 to 0 km s(-1)) that is co-spatially located with the cold dust emission peak, suggesting a large amount of cold interstellar medium (ISM) in the interacting region. As one of the most luminous star-forming dusty high-redshift galaxies, G09v1.97 is an exceptional source for understanding the ISM in gas-rich starbursting major merging systems at high redshift. |
| WOS关键词 | STAR-FORMING GALAXIES ; DEEP SUBMILLIMETER SURVEY ; MOLECULAR GAS ; HIGH-REDSHIFT ; INTERSTELLAR-MEDIUM ; PHYSICAL CONDITIONS ; GRAVITATIONAL LENS ; INITIAL CONDITIONS ; INFRARED GALAXIES ; HERSCHEL-ATLAS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000465638000001 |
| 出版者 | EDP SCIENCES S A |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/24718]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Yang, C. |
| 作者单位 | 1.European Southern Observ, Alonso Cordova 3107, Santiago 19001, Chile 2.Sorbonne Univ, CNRS, Inst Astrophys Paris, UMR 7095, 98 Bis Bd Arago, F-75014 Paris, France 3.Univ Paris Saclay, Univ Paris Sud, CNRS, Inst Astrophys Spatiale,UMR 8617, F-91405 Orsay, France 4.Chinese Acad Sci, Purple Mt Observ, Key Lab Radio Astron, Nanjing 210034, Jiangsu, Peoples R China 5.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany 6.Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland 7.Univ Durham, Ctr Extragalact Astron, Dept Phys, South Rd, Durham DH1 3LE, England 8.Natl Radio Astron Observ, 50 Edgemont Rd, Charlottesville, VA 22903 USA 9.Joint ALMA Observ, Alonso Cordova 3107, Santiago, Chile 10.Inst Radioastron Millimetr IRAM, 300 Rue Piscine, F-38406 St Martin Dheres, France |
| 推荐引用方式 GB/T 7714 | Yang, C.,Gavazzi, R.,Beelen, A.,et al. CO, H2O, H2O+ line and dust emission in a z=3.63 strongly lensed starburst merger at sub-kiloparsec scales[J]. ASTRONOMY & ASTROPHYSICS,2019,624:23. |
| APA | Yang, C..,Gavazzi, R..,Beelen, A..,Cox, P..,Omont, A..,...&van der Werf, P..(2019).CO, H2O, H2O+ line and dust emission in a z=3.63 strongly lensed starburst merger at sub-kiloparsec scales.ASTRONOMY & ASTROPHYSICS,624,23. |
| MLA | Yang, C.,et al."CO, H2O, H2O+ line and dust emission in a z=3.63 strongly lensed starburst merger at sub-kiloparsec scales".ASTRONOMY & ASTROPHYSICS 624(2019):23. |
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来源：紫金山天文台
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