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Thermophysical mode...
Thermophysical modelling of Comet P/Borrelly : Effects of volume energy absorption and volume sublimation
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Skorov, Y (författare)
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Keller, H (författare)
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Jorda, L (författare)
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- Davidsson, Björn (författare)
- Uppsala universitet,Institutionen för astronomi och rymdfysik
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(creator_code:org_t)
- 2002
- 2002
- Engelska.
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Ingår i: Earth, moon, and planets. - 0167-9295 .- 1573-0794. ; 90:1, s. 293-303
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this work, we continue revising the theoretical basis of numerical models describing the transport of matter and energy inside a porous dust-ice mixture at low temperature. A model of a light-absorbing near-surface layer of a comet nucleus is investigated. Gas transport is considered simultaneously with the solution of the general heat transfer equation. The quasi-stationary temperature distribution and the H2O mass flux and sublimation rate are computed for a nucleus model of comet 19P/Borrelly at the Deep Space 1 (DS1) encounter. The energy is deposited in a layer of about 20 particle radii: This corresponds to a solid-state greenhouse effect. The surface temperature of the layer-absorbing model as well as the gas production rate are significantly smaller than the ones in the surface-absorbing model. An active fraction of 40-50% would be required to explain the observed water production rate of P/Borrelly with our layer-absorption model at the time of the DS1 encounter.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Cometary nuclei
- P/Borrelly
- surfaces
- thermal models
- Planetary system
- Planetsystemet
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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