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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz


IMPACT FACTOR 2018: 0.350

CiteScore 2018: 0.24

SCImago Journal Rank (SJR) 2018: 0.202
Source Normalized Impact per Paper (SNIP) 2018: 0.144

ICV 2017: 121.03

Open Access
Online
ISSN
2543-6376
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Volume 27, Issue 1

Issues

Thermal Evolution of the Nucleus of the Comet 67P for 120 Years: Numerical Simulations

Andrey V. Rusol / Vera A. Dorofeeva
Published Online: 2018-09-14 | DOI: https://doi.org/10.1515/astro-2018-0030

Abstract

The purpose of this paper is to estimate to what temperatures and to what depth the outer layers of the cometary nuclei are heated for several dozen revolutions around the Sun, and what changes in the composition of the volatiles occur in this case. This is important because it is not clear how much the experimentally obtained results on the composition of cometary comes depend on how long the comet is in the current orbit. Our approach to this problem is based on using 3D model of the geometry and dynamics of a cometary nucleus that takes into account the diurnal rotation and orientation of the rotation axis relative to the Sun to simulate the irradiance to take value of temperature the surface of the nucleus and 1D thermal model of the porous ice-rock body. The results of the numerical simulation of heat propagation in the subsurface layers of some points the MA’AT region of the 67P core, obtained for the 20 orbital cycles (close to 130 years), are presented in this paper.

Keywords: comets; models of thermal evolution; depth of heat propagation

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About the article

Received: 2018-03-01

Accepted: 2018-06-01

Published Online: 2018-09-14


Citation Information: Open Astronomy, Volume 27, Issue 1, Pages 175–182, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2018-0030.

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© by Andrey V. Rusol and Vera A. Dorofeeva, published by De Gruyter. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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