Comet 67P/Churyumov-Gerasimenko sheds dust coat accumulated over the past four years

  title={Comet 67P/Churyumov-Gerasimenko sheds dust coat accumulated over the past four years},
  author={Rita M. Schulz and Martin Hilchenbach and Y. Langevin and Jochen Kissel and Johan Sil{\'e}n and Christelle Briois and C{\'e}cile Engrand and Klaus Hornung and Donia Baklouti and Anais Bardyn and Herv{\'e} Cottin and Henning Fischer and Nicolas Fray and Marie Godard and Harry J. Lehto and L{\'e}na Le Roy and S. Merouane and François-R{\'e}gis Orthous-Daunay and J. A. Paquette and Jouni Ryn{\"o} and S. Siljestr{\"o}m and Oliver Stenzel and Laurent Thirkell and Kurt Varmuza and Boris Zaprudin},
Comets are composed of dust and frozen gases. The ices are mixed with the refractory material either as an icy conglomerate, or as an aggregate of pre-solar grains (grains that existed prior to the formation of the Solar System), mantled by an ice layer. The presence of water-ice grains in periodic comets is now well established. Modelling of infrared spectra obtained about ten kilometres from the nucleus of comet Hartley 2 suggests that larger dust particles are being physically decoupled from… Expand
Variations in cometary dust composition from Giotto to Rosetta, clues to their formation mechanisms
This paper reviews the current knowledge on the composition of cometary dust (ice, minerals and organics) in order to constrain their origin and formation mechanisms. Comets have been investigated byExpand
The COmetary Secondary Ion Mass Analyser instrument on board ESA's Rosetta mission has collected dust particles in the coma of comet 67P/Churyumov-Gerasimenko. During the early-orbit phase of theExpand
The primordial nucleus of comet 67P/Churyumov-Gerasimenko
We investigate the formation and evolution of comet nuclei and other trans-Neptunian objects (TNOs) in the solar nebula and primordial disk prior to the giant planet orbit instability foreseen by theExpand
Carbon-rich dust in comet 67P/Churyumov-Gerasimenko measured by COSIMA/Rosetta
Cometary ices are rich in CO2, CO and organic volatile compounds, but the carbon content of cometary dust was only measured for the Oort Cloud comet 1P/Halley, during its flyby in 1986. The COmetaryExpand
The asteroid-comet continuum from laboratory and space analyses of comet samples and micrometeorites
Abstract Comets are probably the best archives of the nascent solar system, 4.5 Gyr ago, and their compositions reveal crucial clues on the structure and dynamics of the early protoplanetary disk.Expand
Density and Charge of Pristine Fluffy Particles from Comet 67P/Churyumov-Gerasimenko
The Grain Impact Analyzer and Dust Accumulator (GIADA) instrument on board ESA’s Rosetta mission is constraining the origin of the dust particles detected within the coma of comet 67Expand
Icy Grains in the Solar System: Cometary and Asteroidal Environments
Icy grains have been directly detected or inferred in the circumnuclear region of various short- and long-period comets. In particular, comets 103P/Hartley 2, C/2002 T7 (LINEAR), and, recently C/2013Expand
High-molecular-weight organic matter in the particles of comet 67P/Churyumov–Gerasimenko
It is concluded that the observed cometary carbonaceous solid matter could have the same origin as the meteoritic insoluble organic matter, but suffered less modification before and/or after being incorporated into the comet. Expand
67P/Churyumov–Gerasimenko’s dust activity from pre- to post-perihelion as detected by Rosetta/GIADA
We characterized the 67P/Churyumov–Gerasimenko’s dust activity, by analysing individual dust particle velocity and momentum measurements of Grain Impact Analyser and Dust Accumulator (GIADA), theExpand
Rosetta Studies of Comet 67P/Churyumov-Gerasimenko: Prospects for Establishing Cometary Biology
A wide range of data emerging from the Rosetta Mission that all point indirectly to biological activity in Comet 67P/Churyumov–Gerasimenko are discussed, including the detection of an overwhelming abundance of complex organic molecules at the surface by Philae and through IR imaging by theRosetta orbiter. Expand


Pre-perihelion activity of comet 67P/Churyumov-Gerasimenko
Context. Comets are believed to hold a relatively pristine record of the physical and chemical processes that occurred during the formation and evolution of the solar system. Thorough investigationsExpand
The zodiacal cloud is a thick circumsolar disk of small debris particles produced by asteroid collisions and comets. Their relative contribution and how particles of different sizes dynamicallyExpand
On the sodium overabundance in cometary meteoroids
Abstract Relative chemical abundances and physical properties of cometary meteoroids can be deduced from meteor spectroscopy. The study of moderately volatile elements like Na can provide clues onExpand
Detection of water ice grains after the DEEP IMPACT onto Comet 9P/Tempel 1
Context. Icy grains in the inner coma of a comet may play an important role in the energy balance and in the production of certain gas coma species. Their existence has therefore been assumedExpand
Dust release and mantle development in comets
A model of dust release and dust mantle development by cometary nuclei is developed to explain the brightness asymmetry observed in comets before and after perihelion. Assuming that the cometaryExpand
COSIMA-Rosetta calibration for in situ characterization of 67P/Churyumov–Gerasimenko cometary inorganic compounds
COSIMA (COmetary Secondary Ion Mass Analyser) is a time-of-flight secondary ion mass spectrometer (TOF-SIMS) on board the Rosetta space mission. COSIMA has been designed to measure the composition ofExpand
Morphological Structure and Chemical Composition of Cometary Nuclei and Dust
The chemical composition of comet nuclei derived from current data on interstellar dust ingredients and comet dust and coma molecules are shown to be substantially consistent with each other in bothExpand
Water ice and dust in the innermost coma of comet 103P/Hartley 2
Abstract On November 4th, 2010, the Deep Impact eXtended Investigation (DIXI) successfully encountered comet 103P/Hartley 2, when it was at a heliocentric distance of 1.06 AU. Spatially resolvedExpand
The Stardust Mission: Analyzing Samples from the Edge of the Solar System
Comet samples returned to Earth by the NASA Stardust mission have provided a surprising glimpse into the nature of early Solar System materials and an epiphany on the origin of the initial rockyExpand
Collecting cometary dust particles on metal blacks with the COSIMA instrument onboard ROSETTA
Abstract After a brief review of the instrument development and materials selection for collecting cometary dust in the vicinity of comet 67/P Churyumov–Gerasimenko we focus on laboratoryExpand