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题名: THE [N II] 205 mu m EMISSION IN LOCAL LUMINOUS INFRARED GALAXIES
作者: Zhao YingHe(赵应和)1, 2, 3; Lu, Nanyao1; Xu, C. Kevin1; Gao Yu(高煜)2, 3; Lord, Steven D.4; Charmandaris, Vassilis5, 6; Diaz-Santos, Tanio7, 8; Evans, Aaron9, 10; Howell, Justin1; Petric, Andreea O.11; van der Werf, Paul P.12; Sanders, David B.13
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2016-03-01
卷号: 819, 期号:1
关键词: galaxies: evolution ; galaxies: ISM ; galaxies: luminosity function, mass function ; galaxies: starburst ; infrared: ISM
DOI: 10.3847/0004-637X/819/1/69
文章类型: Article
英文摘要: In this paper, we present the measurements of the [N II] 205 mu m line for a flux-limited sample of 122 (ultra-) luminous infrared galaxies [(U)LIRGs] and 20 additional normal galaxies, obtained with the Herschel Space Observatory (Herschel). We explore the far-infrared (FIR) color dependence of the [N II] 205 mu m (L-[N II]205 (mu m)) to the total infrared (L-IR) luminosity ratio, and find that L-[N II]205 (mu m)/LIR only depends modestly on the 70-160 mu m flux density ratio (f(70)/f(160)) when f(70)/f(160) less than or similar to 0.6, whereas such dependence becomes much steeper for f(70)/f(160) > 0.6. We also investigate the relation between L-[N II]205 mu m and star formation rate (SFR), and show that L-[N II]205 mu m has a nearly linear correlation with SFR, albeit the intercept of such a relation varies somewhat with f(60)/f(100), consistent with our previous conclusion that [N II] 205 mu m emission can serve as an SFR indicator with an accuracy of similar to 0.4 dex, or similar to 0.2 dex if f(60)/f(100) is known independently. Furthermore, together with the Infrared Space Observatory measurements of [N II], we use a total of similar to 200 galaxies to derive the local [N II] 205 mu m luminosity function (LF) by tying it to the known IR LF with a bivariate method. As a practical application, we also compute the local SFR volume density ((rho) over dot(SFR)) using the newly derived SFR calibrator and LF. The resulting log (rho) over dot(SFR) = -1.96 +/- 0.11 M-circle dot yr(-1) Mpc(-3) agrees well with previous studies. Finally, we determine the electron densities (n(e)) of the ionized medium for a subsample of 12 (U)LIRGs with both [N II] 205 mu m and [N II] 122 mu m data, and find that n(e) is in the range of similar to 1-100 cm(-3), with a median value of 22 cm(-3).
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: STAR-FORMING GALAXIES ; FOURIER-TRANSFORM SPECTROMETER ; SPECTRAL ENERGY-DISTRIBUTION ; STRUCTURE LINE DIAGNOSTICS ; ACTIVE GALACTIC NUCLEI ; HIGH-REDSHIFT GALAXIES ; WARM MOLECULAR GAS ; SKY LIRG SURVEY ; NEARBY GALAXIES ; ALMA OBSERVATIONS
收录类别: SCI
项目资助者: NASA by JPL/Caltech ; National Natural Science Foundation of China(11173059 ; CAS pilot-b project(XDB09000000) ; EU(PIRSES-GA-2012-316788) ; ALMA-CONICYT(31130005) ; FONDECYT(1151239) ; National Aeronautics and Space Administration ; 11390373 ; 11420101002)
语种: 英语
WOS记录号: WOS:000372303400069
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16173
Appears in Collections:星系中的恒星形成研究团组_期刊论文

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作者单位: 1.Calif Inst Technol 100 22, Infrared Proc & Anal Ctr, Pasadena, CA 91125 USA
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
4.SETI Inst, 189 Bernardo Ave,Suite 100, Mountain View, CA 94043 USA
5.Univ Crete, Dept Phys & ITCP, GR-71003 Iraklion, Greece
6.Natl Observ Athens, IAASARS, GR-15236 Penteli, Greece
7.CALTECH, Spitzer Sci Ctr, MS 220-6, Pasadena, CA 91125 USA
8.Univ Diego Portales, Fac Ingn, Nucleo Astron, Ave Ejercito Libertador 441, Santiago, Chile
9.Univ Virginia, Dept Astron, 530 McCormick Rd, Charlottesville, VA 22904 USA
10.Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA
11.Gemini Observ, Northern Operat Ctr, 670 N Aohoku Pl, Hilo, HI 96720 USA
12.Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
13.Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA
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