The diurnal cycle of water ice on comet 67P/Churyumov-Gerasimenko

M. C. De Sanctis; F. Capaccioni; M. Ciarniello; G. Filacchione; M. Formisano; S. Mottola; A. Raponi; F. Tosi; D. Bockelee-Morvan; S. Erard; C. Leyrat; B. Schmitt; E. Ammannito; G. Arnold; M. A. Barucci; M. Combi; M. T. Capria; P. Cerroni; W. H. Ip; E. Kuehrt; T. B. McCord; E. Palomba; P. Beck; E. Quirico

doi:10.1038/nature14869

The diurnal cycle of water ice on comet 67P/Churyumov-Gerasimenko

M. C. De Sanctis, F. Capaccioni, M. Ciarniello, G. Filacchione, M. Formisano, S. Mottola, A. Raponi, F. Tosi, D. Bockelee-Morvan, S. Erard, C. Leyrat, B. Schmitt, E. Ammannito, G. Arnold, M. A. Barucci, M. Combi, M. T. Capria, P. Cerroni, W. H. Ip, E. KuehrtT. B. McCord, E. Palomba, P. Beck, E. Quirico

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摘要

Observations of cometary nuclei have revealed a very limited amount of surface water ice, which is insufficient to explain the observed water outgassing. This was clearly demonstrated on comet 9P/Tempel 1, where the dust jets (driven by volatiles) were only partially correlated with the exposed ice regions. The observations of 67P/Churyumov-Gerasimenko have revealed that activity has a diurnal variation in intensity arising from changing insolation conditions. It was previously concluded that water vapour was generated in ice-rich subsurface layers with a transport mechanism linked to solar illumination, but that has not hitherto been observed. Periodic condensations of water vapour very close to, or on, the surface were suggested to explain short-lived outbursts seen near sunrise on comet 9P/Tempel 1. Here we report observations of water ice on the surface of comet 67P/Churyumov-Gerasimenko, appearing and disappearing in a cyclic pattern that follows local illumination conditions, providing a source of localized activity. This water cycle appears to be an important process in the evolution of the comet, leading to cyclical modification of the relative abundance of water ice on its surface.

原文	???core.languages.en_GB???
頁（從 - 到）	500-503
頁數	4
期刊	Nature
卷	525
發行號	7570
DOIs	https://doi.org/10.1038/nature14869
出版狀態	已出版 - 24 9月 2015

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De Sanctis, M. C., Capaccioni, F., Ciarniello, M., Filacchione, G., Formisano, M., Mottola, S., Raponi, A., Tosi, F., Bockelee-Morvan, D., Erard, S., Leyrat, C., Schmitt, B., Ammannito, E., Arnold, G., Barucci, M. A., Combi, M., Capria, M. T., Cerroni, P., Ip, W. H., ... Quirico, E. (2015). The diurnal cycle of water ice on comet 67P/Churyumov-Gerasimenko. Nature, 525(7570), 500-503. https://doi.org/10.1038/nature14869

@article{58c05ee0ba3046529e91d5627bf65464,

title = "The diurnal cycle of water ice on comet 67P/Churyumov-Gerasimenko",

abstract = "Observations of cometary nuclei have revealed a very limited amount of surface water ice, which is insufficient to explain the observed water outgassing. This was clearly demonstrated on comet 9P/Tempel 1, where the dust jets (driven by volatiles) were only partially correlated with the exposed ice regions. The observations of 67P/Churyumov-Gerasimenko have revealed that activity has a diurnal variation in intensity arising from changing insolation conditions. It was previously concluded that water vapour was generated in ice-rich subsurface layers with a transport mechanism linked to solar illumination, but that has not hitherto been observed. Periodic condensations of water vapour very close to, or on, the surface were suggested to explain short-lived outbursts seen near sunrise on comet 9P/Tempel 1. Here we report observations of water ice on the surface of comet 67P/Churyumov-Gerasimenko, appearing and disappearing in a cyclic pattern that follows local illumination conditions, providing a source of localized activity. This water cycle appears to be an important process in the evolution of the comet, leading to cyclical modification of the relative abundance of water ice on its surface.",

author = "{De Sanctis}, {M. C.} and F. Capaccioni and M. Ciarniello and G. Filacchione and M. Formisano and S. Mottola and A. Raponi and F. Tosi and D. Bockelee-Morvan and S. Erard and C. Leyrat and B. Schmitt and E. Ammannito and G. Arnold and Barucci, {M. A.} and M. Combi and Capria, {M. T.} and P. Cerroni and Ip, {W. H.} and E. Kuehrt and McCord, {T. B.} and E. Palomba and P. Beck and E. Quirico",

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year = "2015",

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De Sanctis, MC, Capaccioni, F, Ciarniello, M, Filacchione, G, Formisano, M, Mottola, S, Raponi, A, Tosi, F, Bockelee-Morvan, D, Erard, S, Leyrat, C, Schmitt, B, Ammannito, E, Arnold, G, Barucci, MA, Combi, M, Capria, MT, Cerroni, P, Ip, WH, Kuehrt, E, McCord, TB, Palomba, E, Beck, P & Quirico, E 2015, 'The diurnal cycle of water ice on comet 67P/Churyumov-Gerasimenko', Nature, 卷 525, 編號 7570, 頁 500-503. https://doi.org/10.1038/nature14869

TY - JOUR

T1 - The diurnal cycle of water ice on comet 67P/Churyumov-Gerasimenko

AU - De Sanctis, M. C.

AU - Capaccioni, F.

AU - Ciarniello, M.

AU - Filacchione, G.

AU - Formisano, M.

AU - Mottola, S.

AU - Raponi, A.

AU - Tosi, F.

AU - Bockelee-Morvan, D.

AU - Erard, S.

AU - Leyrat, C.

AU - Schmitt, B.

AU - Ammannito, E.

AU - Arnold, G.

AU - Barucci, M. A.

AU - Combi, M.

AU - Capria, M. T.

AU - Cerroni, P.

AU - Ip, W. H.

AU - Kuehrt, E.

AU - McCord, T. B.

AU - Palomba, E.

AU - Beck, P.

AU - Quirico, E.

PY - 2015/9/24

Y1 - 2015/9/24

N2 - Observations of cometary nuclei have revealed a very limited amount of surface water ice, which is insufficient to explain the observed water outgassing. This was clearly demonstrated on comet 9P/Tempel 1, where the dust jets (driven by volatiles) were only partially correlated with the exposed ice regions. The observations of 67P/Churyumov-Gerasimenko have revealed that activity has a diurnal variation in intensity arising from changing insolation conditions. It was previously concluded that water vapour was generated in ice-rich subsurface layers with a transport mechanism linked to solar illumination, but that has not hitherto been observed. Periodic condensations of water vapour very close to, or on, the surface were suggested to explain short-lived outbursts seen near sunrise on comet 9P/Tempel 1. Here we report observations of water ice on the surface of comet 67P/Churyumov-Gerasimenko, appearing and disappearing in a cyclic pattern that follows local illumination conditions, providing a source of localized activity. This water cycle appears to be an important process in the evolution of the comet, leading to cyclical modification of the relative abundance of water ice on its surface.

AB - Observations of cometary nuclei have revealed a very limited amount of surface water ice, which is insufficient to explain the observed water outgassing. This was clearly demonstrated on comet 9P/Tempel 1, where the dust jets (driven by volatiles) were only partially correlated with the exposed ice regions. The observations of 67P/Churyumov-Gerasimenko have revealed that activity has a diurnal variation in intensity arising from changing insolation conditions. It was previously concluded that water vapour was generated in ice-rich subsurface layers with a transport mechanism linked to solar illumination, but that has not hitherto been observed. Periodic condensations of water vapour very close to, or on, the surface were suggested to explain short-lived outbursts seen near sunrise on comet 9P/Tempel 1. Here we report observations of water ice on the surface of comet 67P/Churyumov-Gerasimenko, appearing and disappearing in a cyclic pattern that follows local illumination conditions, providing a source of localized activity. This water cycle appears to be an important process in the evolution of the comet, leading to cyclical modification of the relative abundance of water ice on its surface.

UR - http://www.scopus.com/inward/record.url?scp=84942531833&partnerID=8YFLogxK

U2 - 10.1038/nature14869

DO - 10.1038/nature14869

M3 - 期刊論文

C2 - 26399830

AN - SCOPUS:84942531833

SN - 0028-0836

VL - 525

SP - 500

EP - 503

JO - Nature

JF - Nature

IS - 7570

ER -

The diurnal cycle of water ice on comet 67P/Churyumov-Gerasimenko

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