Gas outflow and dust transport of comet 67P/Churyumov-Gerasimenko

DOI: 
10.1093/mnras/stx332
Publication date: 
01/11/2016
Main author: 
Lai, I.-L.
IAA authors: 
Gutiérrez, P.J.; Lara, L.M.; López-Moreno, J.J.
Authors: 
Lai, I.-L., Ip, W.-H., Su, C.-C., Wu, J.-S., Lee, J.-C., Lin, Z.-Y., Liao, Y., Thomas, N., Sierks, H., Barbieri, C., Lamy, P., Rodrigo, R., Koschny, D., Rickman, H., Keller, H.U., Agarwal, J., A'Hearn, M.F., Barucci, M.A., Bertaux, J.-L., Bertini, I., Boudreault, S., Cremonese, G., Da Deppo, V., Davidsson, B., Debei, S., De Cecco, M., Deller, J., Fornasier, S., Fulle, M., Groussin, O., Gutiérrez, P.J., Güttler, C., Hofmann, M., Hviid, S.F., Jorda, L., Knollenberg, J., Kovacs, G., Kramm, J.-R., Kührt, E., Küppers, M., Lara, L.M., Lazzarin, M., Moreno, J.J.L., Marzari, F., Naletto, G., Oklay, N., Shi, X., Tubiana, C., Vincent, J.-B.
Journal: 
Monthly Notices of the Royal Astronomical Society
Refereed: 
Yes
Publication type: 
Article
Volume: 
462
Pages: 
S533-S546
Number: 
Suplemento 1
Abstract: 
<p><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">Because of the diurnal thermal cycle and the irregular shape of the nucleus,&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">gas</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">outflow</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;of&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">comet</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">67P</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">/</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">Churyumov-Gerasimenko</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;could be highly anisotropic as indicated by the colliminated&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">dust</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;jet structures on the sunlit side. Based on the OSIRIS imaging observations of the outgassing effect, a simple model of surface sublimation can be constructed by taking into account the dependence on the solar insolation. With preliminary information on the time variability of the global&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">gas</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;production rate, a sequence of&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">gas</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;coma models can be generated at different epochs before and after perihelion. We also investigate different patterns of&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">dust</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;particle dynamics under the influences of nuclear rotation and&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">gas</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;drag. From these considerations, a consistent picture of the spatial distribution of dusty materials across the surface of&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">comet</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">67P</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;as it moves around the perihelion can be developed. It is found that because of the redeposition of the ejected&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">dust</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;from the Southern hemisphere to the Northern hemisphere during the southern summer season the Hapi region could gain up to 0.4 m while the Wosret region would lose up to 1.8 m of&nbsp;</span><span class="ScopusTermHighlight" style="box-sizing: border-box; background-color: rgb(252, 243, 142); display: inline-block; padding: 0.2rem 0.1rem; color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px;">dust</span><span style="color: rgb(80, 80, 80); font-family: NexusSan, Arial, Georgia, sans-serif, serif; font-size: 16px; background-color: rgb(255, 255, 255);">&nbsp;mantle per orbit. © 2017 The Authors.</span></p>
Database: 
WOK
SCOPUS
Keywords: 
Comets: general Comets: individual: comet 67P/Churyumov-Gerasimenko Methods: numerical