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Far-infrared Herschel SPIRE spectroscopy of lensed starbursts reveals physical conditions of ionized gas
Zhang, Zhi-Yu1,2; Ivison, R. J.1,2; George, R. D.1; Zhao, Yinghe3,4,5; Dunne, L.1,6; Herrera-Camus, R.7; Lewis, A. J. R.1; Liu, Daizhong8,9; Naylor, D.10; Oteo, Ivan1,2; Riechers, D. A.11; Smail, Ian12; Yang, Chentao9,13,14; Eales, Stephen6; Hopwood, Ros15; Maddox, Steve1,6; Omont, Alain14; van der Werf, Paul16
2018-11-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume481Issue:1Pages:59-97
Abstract

The most intensively star-forming galaxies are extremely luminous at far-infrared ( FIR) wavelengths, highly obscured at optical and ultraviolet wavelengths, and lie at z >= 1-3. We present a programme of FIR spectroscopic observations with the SPIRE FTS, as well as photometric observations with PACS, both on board Herschel, towards a sample of 45 gravitationally lensed, dusty starbursts across z similar to 1-3.6. In total, we detected 27 individual lines down to 3 sigma, including nine [C II] 158 mu m lines with confirmed spectroscopic redshifts, five possible [C II] lines consistent with their FIR photometric redshifts, and in some individual sources a few [OIII] 88 mu m, [O III] 52 mu m, [O I] 145 mu m, [O I] 63 mu m, [N II] 122 mu m and OH 119 mu m ( in absorption) lines. To derive the typical physical properties of the gas in the sample, we stack all spectra weighted by their intrinsic luminosity and by their 500 mu m flux densities, with the spectra scaled to a common redshift. In the stacked spectra, we detect emission lines of [CII] 158 mu m, [N II] 122 mu m, [O III] 88 mu m, [O III] 52 mu m, [O I] 63 mu m and the absorption doublet of OH at 119 mu m, at high fidelity. We find that the average electron densities traced by the [NII] and [O III] lines are higher than the average values in local star-forming galaxies and ULIRGs, using the same tracers. From the [NII]/[C II] and [O I]/[C II] ratios, we find that the [CII] emission is likely dominated by the photodominated regions (PDR), instead of by ionized gas or large-scale shocks.

Keywordgalaxies: active galaxies: high-redshift galaxies: starburst infrared: galaxies submillimetre: galaxies
DOI10.1093/mnras/sty2082
WOS KeywordFOURIER-TRANSFORM SPECTROMETER ; H-II REGIONS ; ACTIVE GALACTIC NUCLEI ; HUBBLE-SPACE-TELESCOPE ; STAR-FORMATION HISTORY ; SOUTH-POLE TELESCOPE ; NARROW-LINE REGIONS ; EARLY-TYPE GALAXIES ; DEEP-FIELD-SOUTH ; SUBMILLIMETER GALAXIES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000449651400006
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/20864
Collection中国科学院紫金山天文台
Corresponding AuthorZhang, Zhi-Yu; Ivison, R. J.
Affiliation1.Univ Edinburgh, Inst Astron, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland
2.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
3.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China
4.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China
5.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China
6.Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales
7.Max Planck Inst Extraterr Phys MPE, Giessenbachstr, D-85748 Garching, Germany
8.MPIA, Koenigstuhl 17, D-69117 Heidelberg, Germany
9.Purple Mt Observ, 2 West Beijing Rd, Nanjing 230000, Jiangsu, Peoples R China
10.Univ Lethbridge, Dept Phys, Lethbridge, AB T1K 3M4, Canada
11.Cornell Univ, Dept Astron, Space Sci Bldg, Ithaca, NY 14853 USA
12.Univ Durham, Ctr Extragalact Astron, Dept Phys, South Rd, Durham DH1 3LE, England
13.European Southern Observ, Alonso de Cordova 3107,Casilla 19001, Santiago, Chile
14.Sorbonne Univ, Inst Astrophys Paris, CNRS, UMR 7095, 98 Bis Bd Arago, F-75014 Paris, France
15.Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England
16.Leiden Univ, Sterrewacht Leiden, POB 9513, NL-2300 RA Leiden, Netherlands
Recommended Citation
GB/T 7714
Zhang, Zhi-Yu,Ivison, R. J.,George, R. D.,et al. Far-infrared Herschel SPIRE spectroscopy of lensed starbursts reveals physical conditions of ionized gas[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,481(1):59-97.
APA Zhang, Zhi-Yu.,Ivison, R. J..,George, R. D..,Zhao, Yinghe.,Dunne, L..,...&van der Werf, Paul.(2018).Far-infrared Herschel SPIRE spectroscopy of lensed starbursts reveals physical conditions of ionized gas.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,481(1),59-97.
MLA Zhang, Zhi-Yu,et al."Far-infrared Herschel SPIRE spectroscopy of lensed starbursts reveals physical conditions of ionized gas".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 481.1(2018):59-97.
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