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首页> 外文期刊>Science >Seasonal exposure of carbon dioxide ice on the nucleus of comet 67P/Churyumov-Gerasimenko
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Seasonal exposure of carbon dioxide ice on the nucleus of comet 67P/Churyumov-Gerasimenko

机译：二氧化碳冰在季节性彗星67P / Churyumov-Gerasimenko核上的季节性暴露

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摘要

Carbon dioxide (CO2) is one of the most abundant species in cometary nuclei, but because of its high volatility, CO2 ice is generally only found beneath the surface. We report the infrared spectroscopic identification of a CO2 ice-rich surface area located in the Anhur region of comet 67P/ Churyumov-Gerasimenko. Spectral modeling shows that about 0.1% of the 80-by 60-meter area is CO2 ice. This exposed ice was observed a short time after the comet exited local winter; following the increased illumination, the CO2 ice completely disappeared over about 3 weeks. We estimate the mass of the sublimated CO2 ice and the depth of the eroded surface layer. We interpret the presence of CO2 ice as the result of the extreme seasonal changes induced by the rotation and orbit of the comet.
机译：二氧化碳（CO2）是彗星核中含量最丰富的物种之一，但由于其挥发性高，通常只能在表层以下发现它。我们报告了位于彗星67P / Churyumov-Gerasimenko的Anhur地区的富含CO2冰的表面积的红外光谱识别。光谱建模显示，80 x 60米的区域中约有0.1％是CO2冰。彗星退出当地冬季后不久，就观察到了这种裸露的冰块。随着光照的增加，CO2冰在约3周内完全消失。我们估计升华的CO2冰的质量和被侵蚀的表层深度。我们将CO2冰的存在解释为彗星自转和轨道引起的极端季节性变化的结果。

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  • 来源
    《Science》 |2016年第6319期|1563-1566|共4页
  • 作者

    Filacchione G.; Raponi A.; Capaccioni F.; Ciarniello M.; Tosi F.; Capria M. T.; De Sanctis M. C.; Migliorini A.; Piccioni G.; Cerroni P.; Barucci M. A.; Fornasier S.; Schmitt B.; Quirico E.; Erard S.; Bockelee-Morvan D.; Leyrat C.; Arnold G.; Mennella V.; Ammannito E.; Bellucci G.; Benkhoff J.; Bibring J. P.; Blanco A.; Blecka M. I.; Carlson R.; Carsenty U.; Colangeli L.; Combes M.; Combi M.; Crovisier J.; Drossart P.; Encrenaz T.; Federico C.; Fink U.; Fonti S.; Fulchignoni M.; Ip W. -H.; Irwin P.; Jaumann R.; Kuehrt E.; Langevin Y.; Magni G.; McCord T.; Moroz L.; Mottola S.; Palomba E.; Schade U.; Stephan K.; Taylor F.; Tiphene D.; Tozzi G. P.; Beck P.; Biver N.; Bonal L.; Combe J. -Ph.; Despan D.; Flamini E.; Formisano M.; Frigeri A.; Grassi D.; Gudipati M. S.; Kappel D.; Longobardo A.; Mancarella F.; Markus K.; Merlin F.; Orosei R.; Rinaldi G.; Cartacci M.; Cicchetti A.; Hello Y.; Henry F.; Jacquinod S.; Reess J. M.; Noschese R.; Politi R.; Peter G.;

  • 作者单位

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Grenoble Alpes, CNRS, Inst Planetol & Astrophys Grenoble, Grenoble, France;

    Univ Grenoble Alpes, CNRS, Inst Planetol & Astrophys Grenoble, Grenoble, France;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    DLR Deutsch Zentrums Luft & Raumfahrt, Inst Planetary Res, Berlin, Germany;

    INAF Osservatorio Capodimonte, Naples, Italy;

    Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, 603 Charles Young Dr, Los Angeles, CA 90095 USA;

    INAF IAPS, Rome, Italy;

    ESA, European Space Res & Technol Ctr, Noordwjik, Netherlands;

    CNRS, Inst Astrophys Spatial, Orsay, France;

    Univ Salento, Dipartimento Matemat & Fis Ennio De Giorgi, Lecce, Italy;

    Polish Acad Sci, Space Res Ctr, Warsaw, Poland;

    CALTECH, NASA, Jet Prop Lab, Pasadena, CA 91109 USA;

    Univ Grenoble Alpes, CNRS, Inst Planetol & Astrophys Grenoble, Grenoble, France;

    ESA, European Space Res & Technol Ctr, Noordwjik, Netherlands;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Michigan, Space Phys Res Lab, Ann Arbor, MI 48109 USA;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Perugia, Perugia, Italy;

    Univ Arizona, Lunar Planetary Lab, Tucson, AZ 85721 USA;

    Univ Salento, Dipartimento Matemat & Fis Ennio De Giorgi, Lecce, Italy;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Natl Cent Univ, Taipei, Taiwan;

    Univ Oxford, Dept Phys, Oxford, England;

    DLR Deutsch Zentrums Luft & Raumfahrt, Inst Planetary Res, Berlin, Germany;

    DLR Deutsch Zentrums Luft & Raumfahrt, Inst Planetary Res, Berlin, Germany;

    CNRS, Inst Astrophys Spatial, Orsay, France;

    INAF IAPS, Rome, Italy;

    Bear Fight Inst, Winthrop, WA 98862 USA;

    DLR Deutsch Zentrums Luft & Raumfahrt, Inst Planetary Res, Berlin, Germany;

    DLR Deutsch Zentrums Luft & Raumfahrt, Inst Planetary Res, Berlin, Germany;

    INAF IAPS, Rome, Italy;

    Helmholtz Zentrum Berlin Mat & Energie, Berlin, Germany;

    DLR Deutsch Zentrums Luft & Raumfahrt, Inst Planetary Res, Berlin, Germany;

    Univ Oxford, Dept Phys, Oxford, England;

    INAF Osservatorio Astrofis Arcetri, Florence, Italy;

    Univ Grenoble Alpes, CNRS, Inst Planetol & Astrophys Grenoble, Grenoble, France;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Grenoble Alpes, CNRS, Inst Planetol & Astrophys Grenoble, Grenoble, France;

    Bear Fight Inst, Winthrop, WA 98862 USA;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Agenzia Spaziale Italiana, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    CALTECH, NASA, Jet Prop Lab, Pasadena, CA 91109 USA;

    DLR Deutsch Zentrums Luft & Raumfahrt, Inst Planetary Res, Berlin, Germany;

    INAF IAPS, Rome, Italy;

    Univ Salento, Dipartimento Matemat & Fis Ennio De Giorgi, Lecce, Italy;

    DLR Deutsch Zentrums Luft & Raumfahrt, Inst Planetary Res, Berlin, Germany;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    INAF Ist Radioastron, Bologna, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    Univ Paris Diderot, UPMC Univ Paris 06,Sorbonne Paris Cite, Sorbonne Univ,Observ Paris,Paris Sci & Letters Re, Lab Etud Spatiales & Instrumentat Astrophys,CNRS, Paris, France;

    INAF IAPS, Rome, Italy;

    INAF IAPS, Rome, Italy;

    DLR, Inst Opt Sensor Syst, Berlin, Germany;

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