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首页> 外文期刊>The Astrophysical Journal. Letters >HERSCHEL OBSERVATIONS OF FAR-INFRARED COOLING LINES IN INTERMEDIATE REDSHIFT (ULTRA)-LUMINOUS INFRARED GALAXIES
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HERSCHEL OBSERVATIONS OF FAR-INFRARED COOLING LINES IN INTERMEDIATE REDSHIFT (ULTRA)-LUMINOUS INFRARED GALAXIES

机译：中间红外线（ULTRA） - 荧光红外星系中远红外冷却管线的HERSCHEL观察

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摘要

We report the first results from a spectroscopic survey of the [C ii] 158 μm line from a sample of intermediate redshift (0.2 < z < 0.8) (ultra)-luminous infrared galaxies, (U)LIRGs (L_(IR) > 10~(11.5) L_⊙), using the Spectral and Photometric Imaging REceiver–Fourier Transform Spectrometer on board the Herschel Space Observatory. This is the first survey of [C ii] emission, an important tracer of star formation, at a redshift range where the star formation rate density of the universe increases rapidly. We detect strong [C ii] 158 μm line emission from over 80% of the sample. We find that the [Cii] line is luminous, in the range (0.8–4) × 10~(?3) of the far-infrared continuum luminosity of our sources, and appears to arise from photodissociation regions on the surface of molecular clouds. The L[C ii]/LIR ratio in our intermediate redshift (U)LIRGs is on average～10 times larger than that of local ULIRGs. Furthermore, we find that the L_([C ii])/L_(IR) and L_([C ii])L_(CO(1–0)) ratios in our sample are similar to those of local normal galaxies and high-z star-forming galaxies. ULIRGs at z ～ 0.5 show many similarities to the properties of local normal and high-z star-forming galaxies. Our findings strongly suggest that rapid evolution in the properties of the star-forming regions of (U)LIRGs is likely to have occurred in the last 5 billion years.
机译：我们从中间红移样品（0.2 10）的样品中报告了[C II]158μm管线的光谱调查结果。 〜（11.5）L_∞），使用频谱和光度成像接收器 - 傅立叶空间天文台上的傅立叶变换光谱仪。这是[C II]发射的第一次调查，是宇宙星形成速率密度迅速增加的红移范围。我们从80％的样品中检测到强[C II]158μm排放。我们发现[CII]线是发光的，在我们来源的远红外连续亮度的范围内（0.8-4）×10〜（？3），并且似乎从分子云表面上的光积极区分区产生。我们中间红移（U）Lirgs中的L [C II] / LIR比平均比本地Ulirgs大约10倍。此外，我们发现我们样本中的L _（[C II]）/ L_（IR）和L _（[C II]）L_（CO（1-0））比与本地正常的星系和高的相似z形成星系。 Z〜0.5的Ulirgs显示了许多相似之处与局部正常和高Z星形星系的性质。我们的研究结果强烈建议，（U）Lirgs的星形地区的性质的快速进化可能发生在过去的50亿年中。

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    D. Rigopoulou; R. Hopwood; G. E. Magdis; N. Thatte; B. M. Swinyard; D. Farrah; J.-S. Huang; A. Alonso-Herrero; J. J. Bock; D. Clements; A. Cooray; M. J. Griffin; S. Oliver; C. Pearson; D. Riechers; D. Scott; A. Smith; M. Vaccari; I. Valtchanov; L. Wang;

  • 作者单位

    Department of Physics University of Oxford Keble Road Oxford OX1 3RH UK;

    Physics Department Imperial College London South Kensington Campus London SW7 2AZ UK;

    Department of Physics University of Oxford Keble Road Oxford OX1 3RH UK;

    Department of Physics University of Oxford Keble Road Oxford OX1 3RH UK;

    RAL Space Science and Technology Facilities Council Rutherford Appleton Laboratory Didcot OX11 0QX UK;

    Department of Physics Virginia Tech Blacksburg VA 24061 USA;

    National Astronomical Observatories of China Chinese Academy of Sciences Beijing 100012 China;

    Instituto de Fisica de Cantabria CSIC-UC E-39006 Santander Spain;

    California Institute of Technology 1200 E. California Blvd. Pasadena CA 91125 USA;

    Physics Department Imperial College London South Kensington Campus London SW7 2AZ UK;

    Jet Propulsion Laboratory 4800 Oak Grove Drive Pasadena CA 91109 USA;

    School of Physics and Astronomy Cardiff University Queens Buildings The Parade Cardiff CF24 3AA UK;

    Astronomy Centre Department of Physics and Astronomy University of Sussex Brighton BN1 9QH UK;

    RAL Space Science and Technology Facilities Council Rutherford Appleton Laboratory Didcot OX11 0QX UK;

    Department of Astronomy Cornell University 220 Space Sciences Building Ithaca NY 14853 USA;

    Department of Physics and Astronomy University of British Columbia 6224 Agricultural Road Vancouver BC V6T1Z1 Canada;

    Astronomy Centre Department of Physics and Astronomy University of Sussex Brighton BN1 9QH UK;

    Astrophysics Group Physics Department University of the Western Cape Private Bag X17 7535 Bellville Cape Town South Africa;

    Herschel Science Centre European Space Astronomy Centre Villanueva de la Canada E-28691 Madrid Spain;

    Astronomy Centre Department of Physics and Astronomy University of Sussex Brighton BN1 9QH UK;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 天体力学（理论天文学）;
  • 关键词

    galaxies; starburst-infrared; galaxies-infrared; ISM;

    机译：星系;爆炸 - 红外线;星系红外;ISM;

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