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题名: THE HERSCHEL COMPREHENSIVE (U)LIRG EMISSION SURVEY (HERCULES): CO LADDERS, FINE STRUCTURE LINES, AND NEUTRAL GAS COOLING
作者: Rosenberg, M. J. F.1; van der Werf, P. P.1; Aalto, S.2; Armus, L.3; Charmandaris, V.4, 5, 6; Diaz-Santos, T.3; Evans, A. S.7, 8; Fischer, J.9; Gao Yu(高煜)10; Gonzalez-Alfonso, E.11; Greve, T. R.12; Harris, A. I.13; Henkel, C.14, 15; Israel, F. P.1; Isaak, K. G.16; Kramer, C.17; Meijerink, R.1; Naylor, D. A.18; Sanders, D. B.19; Smith, H. A.20; Spaans, M.21; Spinglio, L.22; Stacey, G. J.23; Veenendaal, I.18; Veilleux, S.13, 24; Walter, F.25; Weiss, A.14; Wiedner, M. C.; van der Wiel, M. H. D.18; Xilouris, E. M.4
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-03-10
卷号: 801, 期号:2, 页码:72
关键词: galaxies: individual (ULIRGs) ; galaxies: ISM ; molecular data ; photon-dominated region (PDR) ; submillimeter: ISM
学科分类: 天文和天体物理
DOI: 10.1088/0004-637X/801/2/72
文章类型: Article
英文摘要: (Ultra) luminous infrared galaxies ((U)LIRGs) are objects characterized by their extreme infrared (8-1000 mu m) luminosities (L-LIRG > 10(11) L-circle dot and L-ULIRG > 10(12) L-circle dot). The Herschel Comprehensive ULIRG Emission Survey (PI: van derWerf) presents a representative flux-limited sample of 29 (U)LIRGs that spans the full luminosity range of these objects (10(11)L(circle dot) <= L-IR <= 10(13)L(circle dot)). With the Herschel Space Observatory, we observe [CII] 157 mu m, [O I] 63 mu m, and [O I] 145 mu m line emission with Photodetector Array Camera and Spectrometer, CO J = 4-3 through J = 13-12, [C I] 370 mu m, and [C I] 609 mu m with SPIRE, and low-J CO transitions with ground-based telescopes. The CO ladders of the sample are separated into three classes based on their excitation level. In 13 of the galaxies, the [O I] 63 mu m emission line is self absorbed. Comparing the CO excitation to the InfraRed Astronomical Satellite 60/100 mu m ratio and to far infrared luminosity, we find that the CO excitation is more correlated to the far infrared colors. We present cooling budgets for the galaxies and find fine-structure line flux deficits in the [C II], [Si II], [O I], and [C I] lines in the objects with the highest far IR fluxes, but do not observe this for CO 4 <= J(upp) <= 13. In order to study the heating of the molecular gas, we present a combination of three diagnostic quantities to help determine the dominant heating source. Using the CO excitation, the CO J = 1-0 linewidth, and the active galactic nucleus (AGN) contribution, we conclude that galaxies with large CO linewidths always have high-excitation CO ladders, and often low AGN contributions, suggesting that mechanical heating is important.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: ULTRALUMINOUS INFRARED GALAXIES ; FOURIER-TRANSFORM SPECTROMETER ; SPACE-OBSERVATORY MEASUREMENTS ; ACTIVE GALACTIC NUCLEI ; DENSE MOLECULAR GAS ; STAR-FORMATION ; ARP 220 ; PHYSICAL CONDITIONS ; MARKARIAN 231 ; WATER-VAPOR
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000350965500001
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14850
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.Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands
2.Chalmers, Dept Earth & Space Sci, Onsala Observ, SE-43994 Onsala, Sweden
3.CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA
4.Natl Observ Athens, Inst Astron Astrophys Space Applicat & Remote Sen, Athens 15236, Greece
5.Univ Crete, Dept Phys, Iraklion 71003, Greece
6.Observ Paris, LERMA, F-75014 Paris, France
7.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA
8.Natl Radio Astron Observ, Charlottesville, VA 22903 USA
9.Naval Res Lab, Remote Sensing Div, Washington, DC 20375 USA
10.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
11.Univ Alcala De Henares, Dept Fis & Matemat, E-28871 Alcala De Henares, Madrid, Spain
12.UCL, Dept Phys & Astron, London WC1E 6BT, England
13.Univ Maryland, Dept Astron, College Pk, MD 20742 USA
14.Max Planck Inst Radioastron, D-53121 Bonn, Germany
15.King Abdulaziz Univ, Dept Astron, Jeddah 21589, Saudi Arabia
16.ESTEC SRE S, Sci Support Off, NL-2201 AZ Noordwijk, Netherlands
17.IRAM, Nucleo Cent, E-18012 Granada, Spain
18.Univ Lethbridge, Inst Space Imaging Sci, Dept Phys & Astron, Lethbridge, AB T1K 3M4, Canada
19.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
20.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
21.Univ Groningen, Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands
22.INAF, Ist Astros & Planetol Spaziali, I-00133 Rome, Italy
23.Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
24.Univ Maryland, Joint Space Sci Inst, College Pk, MD 20742 USA
25.Max Planck Inst Astron, D-69117 Heidelberg, Germany
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