Thermal modelling of water activity on comet 67P/Churyumov-Gerasimenko with global dust mantle and plural dust-to-ice ratio

X. Hu; X. Shi; H. Sierks; J. Blum; J. Oberst; M. Fulle; E. Kührt; C. Güttler; B. Gundlach; H. U. Keller; S. Mottola; M. Pajola; C. Barbieri; P. L. Lamy; R. Rodrigo; D. Koschny; H. Rickman; J. Agarwal; M. F. A'Hearn; M. A. Barucci; J. L. Bertaux; I. Bertini; S. Boudreault; I. Büttner; G. Cremonese; V. Da Deppo; B. Davidsson; S. Debei; M. De Cecco; J. Deller; S. Fornasier; O. Groussin; P. J. Gutiérrez; P. Gutiérrez-Marqués; I. Hall; M. Hofmann; S. F. Hviid; W. H. Ip; L. Jorda; J. Knollenberg; G. Kovacs; J. R. Kramm; M. Küppers; L. M. Lara; M. Lazzarin; J. J. López-Moreno; F. Marzari; G. Naletto; N. Oklay; M. L. Richards; J. Ripken; N. Thomas; C. Tubiana; J. B. Vincent

doi:10.1093/mnras/stx1607

Thermal modelling of water activity on comet 67P/Churyumov-Gerasimenko with global dust mantle and plural dust-to-ice ratio

X. Hu, X. Shi, H. Sierks, J. Blum, J. Oberst, M. Fulle, E. Kührt, C. Güttler, B. Gundlach, H. U. Keller, S. Mottola, M. Pajola, C. Barbieri, P. L. Lamy, R. Rodrigo, D. Koschny, H. Rickman, J. Agarwal, M. F. A'Hearn, M. A. BarucciJ. L. Bertaux, I. Bertini, S. Boudreault, I. Büttner, G. Cremonese, V. Da Deppo, B. Davidsson, S. Debei, M. De Cecco, J. Deller, S. Fornasier, O. Groussin, P. J. Gutiérrez, P. Gutiérrez-Marqués, I. Hall, M. Hofmann, S. F. Hviid, W. H. Ip, L. Jorda, J. Knollenberg, G. Kovacs, J. R. Kramm, M. Küppers, L. M. Lara, M. Lazzarin, J. J. López-Moreno, F. Marzari, G. Naletto, N. Oklay, M. L. Richards, J. Ripken, N. Thomas, C. Tubiana, J. B. Vincent

Graduate Institute of Astronomy

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Abstract

We perform a thermo-physical analysis on water activity of comet 67P/Churyumov- Gerasimenko (67P). The sublimation of water is assumed to occur from beneath a global, desiccated dust mantle over the irregular-shaped nucleus. The concept of two thermal models, the recipe of model formulation and the strategy of application to comet 67P are described. For an accurate and efficient evaluation of energy input by insolation and self-heating over the nucleus, a Landscape data base is devised based on polyhedral shape models of the nucleus. We apply the thermal models to investigate the impact of certain parameters of nucleus properties on water production. It is found that the measured water production of 67P can be overall attributed to sublimation of water ice with a mass abundance of a few to 10 per cent beneath a uniform dust mantle of several millimetres to one centimetre in thickness. Insofar as 67P is concerned, we argue against the necessity to invoke assumptions on localized water activity, or on the distinction of active/dormant surface areas.

Original language	English
Pages (from-to)	S295-S311
Journal	Monthly Notices of the Royal Astronomical Society
Volume	469
DOIs	https://doi.org/10.1093/mnras/stx1607
State	Published - 2017

Keywords

Comets: general
Comets: individual (67P/Churyumov-Gerasimenko)
Solid state: refractory
Solid state: volatile -methods: numerical

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10.1093/mnras/stx1607

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Hu, X., Shi, X., Sierks, H., Blum, J., Oberst, J., Fulle, M., Kührt, E., Güttler, C., Gundlach, B., Keller, H. U., Mottola, S., Pajola, M., Barbieri, C., Lamy, P. L., Rodrigo, R., Koschny, D., Rickman, H., Agarwal, J., A'Hearn, M. F., ... Vincent, J. B. (2017). Thermal modelling of water activity on comet 67P/Churyumov-Gerasimenko with global dust mantle and plural dust-to-ice ratio. Monthly Notices of the Royal Astronomical Society, 469, S295-S311. https://doi.org/10.1093/mnras/stx1607

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title = "Thermal modelling of water activity on comet 67P/Churyumov-Gerasimenko with global dust mantle and plural dust-to-ice ratio",

abstract = "We perform a thermo-physical analysis on water activity of comet 67P/Churyumov- Gerasimenko (67P). The sublimation of water is assumed to occur from beneath a global, desiccated dust mantle over the irregular-shaped nucleus. The concept of two thermal models, the recipe of model formulation and the strategy of application to comet 67P are described. For an accurate and efficient evaluation of energy input by insolation and self-heating over the nucleus, a Landscape data base is devised based on polyhedral shape models of the nucleus. We apply the thermal models to investigate the impact of certain parameters of nucleus properties on water production. It is found that the measured water production of 67P can be overall attributed to sublimation of water ice with a mass abundance of a few to 10 per cent beneath a uniform dust mantle of several millimetres to one centimetre in thickness. Insofar as 67P is concerned, we argue against the necessity to invoke assumptions on localized water activity, or on the distinction of active/dormant surface areas.",

keywords = "Comets: general, Comets: individual (67P/Churyumov-Gerasimenko), Solid state: refractory, Solid state: volatile -methods: numerical",

author = "X. Hu and X. Shi and H. Sierks and J. Blum and J. Oberst and M. Fulle and E. K{\"u}hrt and C. G{\"u}ttler and B. Gundlach and Keller, {H. U.} and S. Mottola and M. Pajola and C. Barbieri and Lamy, {P. L.} and R. Rodrigo and D. Koschny and H. Rickman and J. Agarwal and A'Hearn, {M. F.} and Barucci, {M. A.} and Bertaux, {J. L.} and I. Bertini and S. Boudreault and I. B{\"u}ttner and G. Cremonese and {Da Deppo}, V. and B. Davidsson and S. Debei and {De Cecco}, M. and J. Deller and S. Fornasier and O. Groussin and Guti{\'e}rrez, {P. J.} and P. Guti{\'e}rrez-Marqu{\'e}s and I. Hall and M. Hofmann and Hviid, {S. F.} and Ip, {W. H.} and L. Jorda and J. Knollenberg and G. Kovacs and Kramm, {J. R.} and M. K{\"u}ppers and Lara, {L. M.} and M. Lazzarin and L{\'o}pez-Moreno, {J. J.} and F. Marzari and G. Naletto and N. Oklay and Richards, {M. L.} and J. Ripken and N. Thomas and C. Tubiana and Vincent, {J. B.}",

note = "Publisher Copyright: {\textcopyright} 2017 The Authors.",

year = "2017",

doi = "10.1093/mnras/stx1607",

language = "???core.languages.en_GB???",

volume = "469",

pages = "S295--S311",

journal = "Monthly Notices of the Royal Astronomical Society",

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Hu, X, Shi, X, Sierks, H, Blum, J, Oberst, J, Fulle, M, Kührt, E, Güttler, C, Gundlach, B, Keller, HU, Mottola, S, Pajola, M, Barbieri, C, Lamy, PL, Rodrigo, R, Koschny, D, Rickman, H, Agarwal, J, A'Hearn, MF, Barucci, MA, Bertaux, JL, Bertini, I, Boudreault, S, Büttner, I, Cremonese, G, Da Deppo, V, Davidsson, B, Debei, S, De Cecco, M, Deller, J, Fornasier, S, Groussin, O, Gutiérrez, PJ, Gutiérrez-Marqués, P, Hall, I, Hofmann, M, Hviid, SF, Ip, WH, Jorda, L, Knollenberg, J, Kovacs, G, Kramm, JR, Küppers, M, Lara, LM, Lazzarin, M, López-Moreno, JJ, Marzari, F, Naletto, G, Oklay, N, Richards, ML, Ripken, J, Thomas, N, Tubiana, C & Vincent, JB 2017, 'Thermal modelling of water activity on comet 67P/Churyumov-Gerasimenko with global dust mantle and plural dust-to-ice ratio', Monthly Notices of the Royal Astronomical Society, vol. 469, pp. S295-S311. https://doi.org/10.1093/mnras/stx1607

TY - JOUR

T1 - Thermal modelling of water activity on comet 67P/Churyumov-Gerasimenko with global dust mantle and plural dust-to-ice ratio

AU - Hu, X.

AU - Shi, X.

AU - Sierks, H.

AU - Blum, J.

AU - Oberst, J.

AU - Fulle, M.

AU - Kührt, E.

AU - Güttler, C.

AU - Gundlach, B.

AU - Keller, H. U.

AU - Mottola, S.

AU - Pajola, M.

AU - Barbieri, C.

AU - Lamy, P. L.

AU - Rodrigo, R.

AU - Koschny, D.

AU - Rickman, H.

AU - Agarwal, J.

AU - A'Hearn, M. F.

AU - Barucci, M. A.

AU - Bertaux, J. L.

AU - Bertini, I.

AU - Boudreault, S.

AU - Büttner, I.

AU - Cremonese, G.

AU - Da Deppo, V.

AU - Davidsson, B.

AU - Debei, S.

AU - De Cecco, M.

AU - Deller, J.

AU - Fornasier, S.

AU - Groussin, O.

AU - Gutiérrez, P. J.

AU - Gutiérrez-Marqués, P.

AU - Hall, I.

AU - Hofmann, M.

AU - Hviid, S. F.

AU - Ip, W. H.

AU - Jorda, L.

AU - Knollenberg, J.

AU - Kovacs, G.

AU - Kramm, J. R.

AU - Küppers, M.

AU - Lara, L. M.

AU - Lazzarin, M.

AU - López-Moreno, J. J.

AU - Marzari, F.

AU - Naletto, G.

AU - Oklay, N.

AU - Richards, M. L.

AU - Ripken, J.

AU - Thomas, N.

AU - Tubiana, C.

AU - Vincent, J. B.

PY - 2017

Y1 - 2017

N2 - We perform a thermo-physical analysis on water activity of comet 67P/Churyumov- Gerasimenko (67P). The sublimation of water is assumed to occur from beneath a global, desiccated dust mantle over the irregular-shaped nucleus. The concept of two thermal models, the recipe of model formulation and the strategy of application to comet 67P are described. For an accurate and efficient evaluation of energy input by insolation and self-heating over the nucleus, a Landscape data base is devised based on polyhedral shape models of the nucleus. We apply the thermal models to investigate the impact of certain parameters of nucleus properties on water production. It is found that the measured water production of 67P can be overall attributed to sublimation of water ice with a mass abundance of a few to 10 per cent beneath a uniform dust mantle of several millimetres to one centimetre in thickness. Insofar as 67P is concerned, we argue against the necessity to invoke assumptions on localized water activity, or on the distinction of active/dormant surface areas.

AB - We perform a thermo-physical analysis on water activity of comet 67P/Churyumov- Gerasimenko (67P). The sublimation of water is assumed to occur from beneath a global, desiccated dust mantle over the irregular-shaped nucleus. The concept of two thermal models, the recipe of model formulation and the strategy of application to comet 67P are described. For an accurate and efficient evaluation of energy input by insolation and self-heating over the nucleus, a Landscape data base is devised based on polyhedral shape models of the nucleus. We apply the thermal models to investigate the impact of certain parameters of nucleus properties on water production. It is found that the measured water production of 67P can be overall attributed to sublimation of water ice with a mass abundance of a few to 10 per cent beneath a uniform dust mantle of several millimetres to one centimetre in thickness. Insofar as 67P is concerned, we argue against the necessity to invoke assumptions on localized water activity, or on the distinction of active/dormant surface areas.

KW - Comets: general

KW - Comets: individual (67P/Churyumov-Gerasimenko)

KW - Solid state: refractory

KW - Solid state: volatile -methods: numerical

UR - http://www.scopus.com/inward/record.url?scp=85037056119&partnerID=8YFLogxK

U2 - 10.1093/mnras/stx1607

DO - 10.1093/mnras/stx1607

M3 - 期刊論文

AN - SCOPUS:85037056119

SN - 0035-8711

VL - 469

SP - S295-S311

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

ER -

Thermal modelling of water activity on comet 67P/Churyumov-Gerasimenko with global dust mantle and plural dust-to-ice ratio

Abstract

Keywords

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