67P Dust environment from GIADA and OSIRIS data
Abstract: GIADA is continuously collecting dust since 11 August 2014. Although designed to work at comet distances much closer than those actually planned, thanks to dust loss rates higher than predicted, GIADA is measuring the impact momentum of about a dust grain per day. For the biggest samples, the grain cross section, bulk density and velocity vector has been also determined. These observations have been complemented by 48 OSIRIS single grain detections performed on 4 August 2014, allowing us to complete the dust size distribution up to the largest ejected sizes (actually, some cm). I will discuss results, dust-to-gas ratio and cross section distribution, with comparisons of predictions by the GIADA dust model (2010).
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