Near-perihelion activity of comet 67P/Churyumov-Gerasimenko. A first attempt of non-static analysis
The observed rate of water production of comet 67P/Churyumov–Gerasimenko near its perihelion can be approximated by a very steep power function of the heliocentric distance. Widely used thermophysical models based on a static dust layer on top of the icy/refractory matrix are poorly consistent with...
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Oxford University Press
2020
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ftdlr:oai:elib.dlr.de:138632 2024-01-14T10:10:44+01:00 Near-perihelion activity of comet 67P/Churyumov-Gerasimenko. A first attempt of non-static analysis Skorov, Yuri Keller, H Uwe Mottola, Stefano Hartogh, Paul 2020-03-30 application/pdf https://elib.dlr.de/138632/ https://elib.dlr.de/138632/1/Skorov%20et%20al%202020%20Near-perihelion%20activity%20of%2067P.pdf https://academic.oup.com/mnras/article/494/3/3310/5815794 en eng Oxford University Press https://elib.dlr.de/138632/1/Skorov%20et%20al%202020%20Near-perihelion%20activity%20of%2067P.pdf Skorov, Yuri und Keller, H Uwe und Mottola, Stefano und Hartogh, Paul (2020) Near-perihelion activity of comet 67P/Churyumov-Gerasimenko. A first attempt of non-static analysis. Monthly Notices of the Royal Astronomical Society, 494 (3), Seiten 3310-3316. Oxford University Press. doi:10.1093/mnras/staa865 <https://doi.org/10.1093/mnras/staa865>. ISSN 0035-8711. Planetengeodäsie Asteroiden und Kometen Zeitschriftenbeitrag PeerReviewed 2020 ftdlr https://doi.org/10.1093/mnras/staa865 2023-12-18T00:23:53Z The observed rate of water production of comet 67P/Churyumov–Gerasimenko near its perihelion can be approximated by a very steep power function of the heliocentric distance. Widely used thermophysical models based on a static dust layer on top of the icy/refractory matrix are poorly consistent with these observations. We analyse published model results and demonstrate that thermophysical models with a uniform and static ice free layer do not reproduce the observed steep water production rates of 67P near perihelion. Based on transient thermal modeling we conclude that the accelerated gas activity can be explained assuming that the active area fraction near the south pole is increased. The deeper penetration of the heat wave during polar day (no sunset) can activate sublimation through thicker inert dust layers. This can also lead to removal of thicker dust layers and consequently to an expansion of the active area. Article in Journal/Newspaper South pole German Aerospace Center: elib - DLR electronic library South Pole Monthly Notices of the Royal Astronomical Society 494 3 3310 3316 |
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Open Polar |
collection |
German Aerospace Center: elib - DLR electronic library |
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ftdlr |
language |
English |
topic |
Planetengeodäsie Asteroiden und Kometen |
spellingShingle |
Planetengeodäsie Asteroiden und Kometen Skorov, Yuri Keller, H Uwe Mottola, Stefano Hartogh, Paul Near-perihelion activity of comet 67P/Churyumov-Gerasimenko. A first attempt of non-static analysis |
topic_facet |
Planetengeodäsie Asteroiden und Kometen |
description |
The observed rate of water production of comet 67P/Churyumov–Gerasimenko near its perihelion can be approximated by a very steep power function of the heliocentric distance. Widely used thermophysical models based on a static dust layer on top of the icy/refractory matrix are poorly consistent with these observations. We analyse published model results and demonstrate that thermophysical models with a uniform and static ice free layer do not reproduce the observed steep water production rates of 67P near perihelion. Based on transient thermal modeling we conclude that the accelerated gas activity can be explained assuming that the active area fraction near the south pole is increased. The deeper penetration of the heat wave during polar day (no sunset) can activate sublimation through thicker inert dust layers. This can also lead to removal of thicker dust layers and consequently to an expansion of the active area. |
format |
Article in Journal/Newspaper |
author |
Skorov, Yuri Keller, H Uwe Mottola, Stefano Hartogh, Paul |
author_facet |
Skorov, Yuri Keller, H Uwe Mottola, Stefano Hartogh, Paul |
author_sort |
Skorov, Yuri |
title |
Near-perihelion activity of comet 67P/Churyumov-Gerasimenko. A first attempt of non-static analysis |
title_short |
Near-perihelion activity of comet 67P/Churyumov-Gerasimenko. A first attempt of non-static analysis |
title_full |
Near-perihelion activity of comet 67P/Churyumov-Gerasimenko. A first attempt of non-static analysis |
title_fullStr |
Near-perihelion activity of comet 67P/Churyumov-Gerasimenko. A first attempt of non-static analysis |
title_full_unstemmed |
Near-perihelion activity of comet 67P/Churyumov-Gerasimenko. A first attempt of non-static analysis |
title_sort |
near-perihelion activity of comet 67p/churyumov-gerasimenko. a first attempt of non-static analysis |
publisher |
Oxford University Press |
publishDate |
2020 |
url |
https://elib.dlr.de/138632/ https://elib.dlr.de/138632/1/Skorov%20et%20al%202020%20Near-perihelion%20activity%20of%2067P.pdf https://academic.oup.com/mnras/article/494/3/3310/5815794 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://elib.dlr.de/138632/1/Skorov%20et%20al%202020%20Near-perihelion%20activity%20of%2067P.pdf Skorov, Yuri und Keller, H Uwe und Mottola, Stefano und Hartogh, Paul (2020) Near-perihelion activity of comet 67P/Churyumov-Gerasimenko. A first attempt of non-static analysis. Monthly Notices of the Royal Astronomical Society, 494 (3), Seiten 3310-3316. Oxford University Press. doi:10.1093/mnras/staa865 <https://doi.org/10.1093/mnras/staa865>. ISSN 0035-8711. |
op_doi |
https://doi.org/10.1093/mnras/staa865 |
container_title |
Monthly Notices of the Royal Astronomical Society |
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494 |
container_issue |
3 |
container_start_page |
3310 |
op_container_end_page |
3316 |
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1788065543472807936 |