Computer Science
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..721v&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.721
Computer Science
Scientific paper
Over the last 4 years we have developped a model of dust coma structures, aiming at simulating the behaviour of dust jets from the subsurface of cometary nuclei up to thousands of kilometers away from the surface. Our model was used succesfully to study several targets, the latest one being comet 9P/Tempel 1. For this comet we completely reproduced the behaviour of the jets from ground based observations only, with results in perfect agreement with in-situ measurements by the Deep Impact team (see [2]). We are now applying the same method to images of 67P acquired in 2009, when the comet was in the post-perihelion phase of its orbit, and described in [3]. At that time the comet was very active and has shown many dust coma structures that we analyse to localize the active regions at the surface of the nucleus, and constrain the properties of the dust grains inside the jets. Apart from reconstruction of dust features, our model provided as well good constrains on the rotation axis of several cometary nuclei (73P-B & 73P-C [1], 9P [2]). We use again this tool to improve our knowledge of 67P rotation state, and we will present our results combined with an inversion of a new set of lightcurves acquired between 2004 and 2007 (Tubiana et al [4]) when 67P was in the aphelion arc, leading to a new determination of the spin axis orientation of 67P.
Lara Luisa-Maria
Tubiana Cecilia
Vincent Jean-Baptiste
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