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- Centre National de la Recherche ScientifiqueFR34 papers
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11 papers · 2 filters
Pre-discovery Activity of New Interstellar Comet 2I/Borisov Beyond 5 AU
Quanzhi Ye, Michael S. P. Kelley, Bryce T. Bolin +15
Comet 2I/Borisov, the first unambiguous interstellar comet ever found, was discovered in August 2019 at au from the Sun on its inbound leg. No pre-discovery detection beyon…
Comet 240P/NEAT is Stirring
Michael S. P. Kelley, Dennis Bodewits, Quanzhi Ye +13
Comets are primitive objects that formed in the protoplanetary disk, and have been largely preserved over the history of the Solar System. However, they are not pristine, and surfa…
Characterization of the Nucleus, Morphology and Activity of Interstellar Comet 2I/Borisov by Optical and Near-Infrared GROWTH, Apache Point, IRTF, ZTF and Keck Observations
Bryce T. Bolin, Carey M. Lisse, Mansi M. Kasliwal +52
We present visible and near-infrared photometric and spectroscopic observations of interstellar object 2I/Borisov taken from 2019 September 10 to 2019 November 29 using the GROWTH,…
Diagnostics of collisions between electrons and water molecules in near-ultraviolet and visible wavelengths
D. Bodewits, J. Országh, J. Noonan +2
We studied dissociation reactions of electron impact on water vapor for several fragment species at optical and near ultraviolet wavelengths (200 - 850 nm). The resulting spectrum…
Migrating Scarps as a Significant Driver for Cometary Surface Evolution
Samuel Birch, Alexander Hayes, Orkan Umurhan +10
Rosetta observations of 67P/Churyumov-Gerasimenko (67P) reveal that most changes occur in the fallback-generated smooth terrains, vast deposits of granular material blanketing the…
Diurnal variation of dust and gas production in comet 67P/Churyumov-Gerasimenko at the inbound equinox as seen by OSIRIS and VIRTIS-M on board Rosetta
C. Tubiana, G. Rinaldi, C. Güttler +53
On 27 Apr 2015, when 67P/C-G was at 1.76 au from the Sun and moving towards perihelion, the OSIRIS and VIRTIS-M instruments on Rosetta observed the evolving dust and gas coma durin…