The Open UniversitySkip to content
 

The Refractory-to-Ice Mass Ratio in Comets

Fulle, Marco; Blum, J.; Green, S. F.; Gundlach, B.; Herique, A.; Moreno, F.; Mottola, S.; Rotundi, A. and Snodgrass, C. (2019). The Refractory-to-Ice Mass Ratio in Comets. Monthly Notices of the Royal Astronomical Society, 482(3) pp. 3326–3340.

Full text available as:
[img]
Preview
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (396kB) | Preview
DOI (Digital Object Identifier) Link: https://doi.org/10.1093/mnras/sty2926
Google Scholar: Look up in Google Scholar

Abstract

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 ten 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 Type: Journal Item
Copyright Holders: 2018 The Authors
ISSN: 1365-2966
Keywords: comets: general; comets: individual: 67P/Churyumov–Gerasimenko; Kuiper belt: general; protoplanetary discs; space vehicles
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 57539
SWORD Depositor: Jisc Publications-Router
Depositing User: Jisc Publications-Router
Date Deposited: 12 Nov 2018 10:32
Last Modified: 22 Nov 2019 17:22
URI: http://oro.open.ac.uk/id/eprint/57539
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU