On the nucleus structure and activity of comet 67P/Churyumov-Gerasimenko

@article{Sierks2015OnTN,
  title={On the nucleus structure and activity of comet 67P/Churyumov-Gerasimenko},
  author={Holger Sierks and Cesare Barbieri and Philippe Lamy and R. Rodrigo and Detlef Koschny and Hans Rickman and H. Uwe Keller and Jessica Agarwal and Michael F. A’Hearn and Francesco Angrilli and A-T Auger and M. A. Barucci and J L Bertaux and Ivano Bertini and S{\'e}bastien Besse and Dennis Bodewits and Claire Capanna and Gabriele Cremonese and Vania Da Deppo and Bj{\"o}rn J R Davidsson and Stefano Debei and Mariolino De Cecco and Francesca Ferri and Sonia Fornasier and Marco Fulle and Robert W. Gaskell and Lorenza Giacomini and O. Groussin and Pablo Gutierrez-Marques and Pedro J. Guti{\'e}rrez and C. G{\"u}ttler and N. M. Hoekzema and S. F. Hviid and Wing-H. Ip and Laurent Jorda and J. Knollenberg and Gabor Kovacs and J. Rainer Kramm and E. K{\"u}hrt and Michael K{\"u}ppers and Fiorangela La Forgia and Luisa Maria Lara and Monica Lazzarin and C{\'e}dric Leyrat and J. J. Lopez Moreno and Sara Magrin and Simone Marchi and Francesco Marzari and Matteo Massironi and Harald Michalik and Richard Moissl and Stefano Mottola and Giampiero Naletto and N. Oklay and Maurizio Pajola and Marco Pertile and Frank Preusker and L. Sabau and Frank Scholten and Colin Snodgrass and Nicolas Thomas and Cecilia Tubiana and J.‐B. Vincent and K-P. Wenzel and Mirco Zaccariotto and Martin P{\"a}tzold},
  journal={Science},
  year={2015},
  volume={347}
}
Images from the OSIRIS scientific imaging system onboard Rosetta show that the nucleus of 67P/Churyumov-Gerasimenko consists of two lobes connected by a short neck. The nucleus has a bulk density less than half that of water. Activity at a distance from the Sun of >3 astronomical units is predominantly from the neck, where jets have been seen consistently. The nucleus rotates about the principal axis of momentum. The surface morphology suggests that the removal of larger volumes of material… 

REDISTRIBUTION OF PARTICLES ACROSS THE NUCLEUS OF COMET 67P/CHURYUMOV-GERASIMENKO

We present an investigation of the surface properties of areas on the nucleus of comet 67P/Churyumov-Gerasimenko. Aims. We aim to show that transport of material from one part of the cometary nucleus

Seasonal mass transfer on the nucleus of comet 67P/Chuyumov–Gerasimenko

We collect observational evidence that supports the scheme of mass transfer on the nucleus of comet 67P/Churyumov-Gerasimenko. The obliquity of the rotation axis of 67P causes strong seasonal

Observations and analysis of a curved jet in the coma of comet 67P/Churyumov-Gerasimenko

We analyze the physical properties and dynamical origin of a curved jet of comet 67P/Churyumov-Gerasimenko that was observed repeatedly in several nucleus rotations starting on May 30 and persisting

Sunset jets observed on comet 67P/Churyumov-Gerasimenko sustained by subsurface thermal lag

We present observations of sunset jets on comet 67P/Churyumov-Gerasimenko by Rosetta/OSIRIS camera. In late April 2015, when the comet was at a heliocentric distance of ~1.8AU, clusters of dust jets

Orbital elements of the material surrounding comet 67P/Churyumov-Gerasimenko

We investigate the dust coma within the Hill sphere of comet 67P/Churyumov-Gerasimenko. Aims. We aim to determine osculating orbital elements for individual distinguishable but unresolved

Comet 67P/Churyumov-Gerasimenko: Constraints on its origin from OSIRIS observations

Context. One of the main aims of the ESA Rosetta mission is to study the origin of the solar system by exploring comet 67P/Churyumov-Gerasimenko at close range. Aims. In this paper we discuss the

A homogeneous nucleus for comet 67P/Churyumov–Gerasimenko from its gravity field

It is concluded that the interior of the nucleus of comet 67P/Churyumov–Gerasimenko is homogeneous and constant in density on a global scale without large voids.

The morphological diversity of comet 67P/Churyumov-Gerasimenko

Images of comet 67P/Churyumov-Gerasimenko acquired by the OSIRIS imaging system onboard the European Space Agency’s Rosetta spacecraft offer some support for subsurface fluidization models and mass loss through the ejection of large chunks of material.

Properties of the 67P/Churyumov-Gerasimenko interior revealed by CONSERT radar

Measurements of the interior of Comet 67P/Churyumov-Gerasimenko by Radiowave Transmission (CONSERT) suggest the upper part of the “head” of 67P is fairly homogeneous on a spatial scale of tens of meters, and the dust component may be comparable to that of carbonaceous chondrites.

Comet nuclei composition and evolution

Thanks to Rosetta orbiter’s and Philae lander’s data our knowledge of cometary nuclei composition has experienced a great advancement. The properties of 67P/Churyumov-Gerasimenko nucleus are
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References

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A Portrait of the Nucleus of Comet 67P/Churyumov-Gerasimenko

In 2003, comet 67P/Churyumov–Gerasimenko was selected as the new target of the Rosetta mission as the most suitable alternative to the original target, comet 46P/Wirtanen, on the basis of orbital

Spin and activity of comet 67P/Churyumov-Gerasimenko

ESA’s spacecraft Rosetta is now on its final cruise towards comet 67P/Churyumov-Gerasimenko and will reach its target in 2014. The spacecraft will follow the comet as it comes back to the perihelion,

The morphological diversity of comet 67P/Churyumov-Gerasimenko

Images of comet 67P/Churyumov-Gerasimenko acquired by the OSIRIS imaging system onboard the European Space Agency’s Rosetta spacecraft offer some support for subsurface fluidization models and mass loss through the ejection of large chunks of material.

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67P/Churyumov-Gerasimenko is the target comet of the ESA’s Rosetta mission. After commissioning at the end of March 2014, the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS)

Time variability and heterogeneity in the coma of 67P/Churyumov-Gerasimenko

Rosetta Orbiter Spectrometer for Ion and Neutral Analysis onboard the Rosetta spacecraft has measured the coma composition of comet 67P/Churyumov-Gerasimenko with well-sampled time resolution per rotation, indicating a complex coma-nucleus relationship.

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Aims: Approach observations with the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) experiment onboard Rosetta are used to determine the rotation period, the direction of the

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Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun

The largest orbiting clumps are meter-sized, confirming the dust/gas ratio of 3 inferred at perihelion from models of dust comae and trails.