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dc.contributorDepartment of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland
dc.contributorDepartment of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland; Asteroid Engineering Laboratory, Luleå University of Technology, Box 848, SE-98128 Kiruna, Sweden
dc.contributorArmagh Observatory & Planetarium, College Hill, Armagh, BT61 9DG, UK; Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK
dc.contributorDepartment of Astronomy, University of Maryland, College Park, MD 20742-2421, USA
dc.contributorInstituto de Astrofísica de Andalucá, CSIC, Glorieta de la Astronomia s/n, E-18008 Granada, Spain
dc.contributor.authorPenttilä, Antti
dc.contributor.authorMuinonen, Karri
dc.contributor.authorGranvik, Mikael
dc.contributor.authorGray, Zuri
dc.contributor.authorBagnulo, Stefano
dc.contributor.authorKolokolova, Ludmilla
dc.contributor.authorMoreno, Fernando
dc.date.accessioned2024-02-26T13:41:50Z
dc.date.available2024-02-26T13:41:50Z
dc.date.issued2024-01-01T00:00:00Z
dc.identifier.doi10.3847/PSJ/ad1757
dc.identifier.other2024PSJ.....5...27P
dc.identifier.other10.3847/PSJ/ad1757
dc.identifier.other0000-0001-7403-1721
dc.identifier.other0000-0001-8058-2642
dc.identifier.other0000-0002-5624-1888
dc.identifier.other0000-0002-6610-1897
dc.identifier.other0000-0002-7156-8029
dc.identifier.other0000-0002-9321-3202
dc.identifier.other0000-0003-0670-356X
dc.identifier.urihttp://hdl.handle.net/20.500.14302/1974
dc.description.abstractWe analyze the polarization observations of the Didymos–Dimorphos system before and after the impact by the NASA Double Asteroid Redirection Test spacecraft on Dimorphos. We fit empirical polarization phase curve models and statistically confirm the discovery by Gray et al. about the degree of linear polarization of the system decreasing on the impact and remaining altered for at least 30 days post-impact. With numerical simulations of particles in the geometric optics domain, we estimate the dominant size of the particles either in the regolith of Didymos and Dimorphos or in the impact-driven ejecta cloud to be several hundred micrometers. The observed change between the pre-impact and post-impact systems indicates either a decrease in average particle size of some tens of micrometers or a decreased level of space weathering.
dc.publisherThe Planetary Science Journal
dc.titleModeling Linear Polarization of the Didymos–Dimorphos System before and after the DART Impact
dc.typearticle
dc.source.journalPSJ
dc.source.journalPSJ.....5
dc.source.volume5
dc.identifier.bibcode2024PSJ.....5...27P


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