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The refractory-to-ice mass ratio in comets

Fulle, M. and Blum, J. and Green, S. F. and Grundlach, B. and Herique, A. and Moreno, F. and Mottola, S. and Rotundi, A. and Snodgrass, C. (2018) The refractory-to-ice mass ratio in comets. Monthly Notices of the Royal Astronomical Society, 482 (3), pp. 3324-3340. Oxford University Press. DOI: 10.1093/mnras/sty2926 ISSN 0035-8711

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Official URL: https://doi.org/10.1093/mnras/sty2926


We review the complex relationship between the dust-to-gas mass ratio usually estimated in the material lost by comets, and the refractory-to-ice mass ratio inside the nucleus, which constrains the origin of comets. Such a relationship is dominated by the mass transfer from the perihelion erosion to fallout over most of the nucleus surface. This makes the refractory-to-ice mass ratio inside the nucleus up to 10 times larger than the dust-to-gas mass ratio in the lost material, because the lost material is missing most of the refractories which were inside the pristine nucleus before the erosion. We review the refractory-to-ice mass ratios available for the comet nuclei visited by space missions, and for the Kuiper Belt Objects with well-defined bulk density, finding the 1-σ lower limit of 3. Therefore, comets and KBOs may have less water than CI-chondrites, as predicted by models of comet formation by the gravitational collapse of cm-sized pebbles driven by streaming instabilities in the protoplanetary disc.

Item URL in elib:https://elib.dlr.de/124818/
Document Type:Article
Title:The refractory-to-ice mass ratio in comets
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fulle, M.INAF – Osservatorio Astronomico di Trieste, via Tiepolo 11, 34143 Trieste, ItalyUNSPECIFIED
Blum, J.Institut für Geophysik und extraterrestrische Physik (IGEP), Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, GermanyUNSPECIFIED
Green, S. F.Open University, Milton Keynes, UKUNSPECIFIED
Grundlach, B.Inst. für Geophysik und extraterrestrische Physik, Techn. Univ. Braunschweig, Mendelssohnstr 3, D-38106 Braunschweig, GermanyUNSPECIFIED
Herique, A.Lab. de Planétologie et de Géodynamique, Faculté des Sciences, Nantes, FranceUNSPECIFIED
Moreno, F.Instituto de Astrofísica de Andalucía, Consejo Superior de Investigaciones Científicas (CSIC), P.O. Box 3008, 18080 Granada, SpainUNSPECIFIED
Mottola, S.stefano.mottola (at) dlr.deUNSPECIFIED
Rotundi, A.INAF - Istituto di Astrofisica e Planetologia Spaziali, Area Ricerca Tor Vergata, Via Fosso del Cavaliere 100, 00133 Rome, ItalyUNSPECIFIED
Snodgrass, C.Max-Planck-Institut für Sonnensystemforschung, Göttingen, GermanyUNSPECIFIED
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1093/mnras/sty2926
Page Range:pp. 3324-3340
Publisher:Oxford University Press
Keywords:space vehicles, comets: general, comets: individual: 67P/Churyumov–Gerasimenko, Kuiper belt: general, protoplanetary discs
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Stiebeler, Ulrike
Deposited On:12 Dec 2018 12:43
Last Modified:06 Sep 2019 15:17

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