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Numerical Studies of Surface Erosion in a Multi-Component Comet Nucleus

Gortsas, Nikolaos and Kührt, Ekkehard and Motschmann, Uwe (2008) Numerical Studies of Surface Erosion in a Multi-Component Comet Nucleus. In: Asteroids, Comets, Meteors 2008, 1405, p. 8220. Lunar and Planetary Institute. ACM 2008, 2008-07-14 - 2008-07-18, Baltimore, MD (USA). ISSN 1540-7845

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Abstract

Thermal modeling is an essential tool for investigations of cometary activity and other typical cometary phenomena. Numerous approaches have been published so far but the feedback of surface erosion caused by ice sublimation to the thermal state of the nucleus is commonly neglected. However, near perihelion the characteristic velocity of surface erosion can be considerably higher than that of heat diffusion. Thus, depending on basic parameters, like the thermal conduction coefficient, it is very well conceivable that surface erosion leads to a significantly less heated nucleus. In oder to address this hypothesis we developed a novel thermal conduction code. Numerically speaking we had to solve an initial-boundary value problem with moving boundaries, the so called Stefan problem. First results are discussed.

Document Type:Conference or Workshop Item (Speech)
Title:Numerical Studies of Surface Erosion in a Multi-Component Comet Nucleus
Authors:
AuthorsInstitution or Email of Authors
Gortsas, NikolaosUNSPECIFIED
Kührt, EkkehardUNSPECIFIED
Motschmann, UweTU Braunschweig
Date:July 2008
Journal or Publication Title:Asteroids, Comets, Meteors 2008
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:1405
Page Range:p. 8220
Publisher:Lunar and Planetary Institute
Series Name:LPI Contribution
ISSN:1540-7845
Status:Published
Keywords:Comets, Activity, Surface erosion
Event Title:ACM 2008
Event Location:Baltimore, MD (USA)
Event Type:international Conference
Event Dates:2008-07-14 - 2008-07-18
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Asteroiden und Kometen (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Dr.rer.nat. Ekkehard Kührt
Deposited On:25 Nov 2008
Last Modified:27 Apr 2009 15:26

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