Context. The cometary ionosphere is immersed in fast flowing solar wind. A polarisation electric field may arise for comets much smaller than the gyroradius of pickup ions because ions and electrons respond differently to the solar wind electric field. Aims. A situation similar to that found at a low activity comet has been modelled for barium releases in the Earth's ionosphere. We aim to use such a model and apply it to the case of comet 67P Churyumov-Gerasimenko, the target of the Rosetta mission. We aim to explain the significant tailward acceleration of cometary ions through the modelled electric field. Methods. We obtained analytical solutions for the polarisation electric field of the comet ionosphere using a simplified geometry. Thi...
When a comet approaches the Sun, surface ices sublimate and escape into space. When these neutrals a...
Context. The first long-term in-situ observation of the plasma environment in the vicinity of a come...
http://science.sciencemag.org/content/347/6220/aaa0571.fullInternational audienceThe Rosetta mission...
Context. The cometary ionosphere is immersed in fast flowing solar wind. A polarisation electric fie...
International audienceContext. The cometary ionosphere is immersed in fast flowing solar wind. A pol...
Context. The cometary ionosphere is immersed in fast flowing solar wind. A polarisation electric fie...
Context. The cometary ionosphere is immersed in fast flowing solar wind. A polarisation electric fie...
Context. The plasma near the nucleus of a comet is subjected to an electric field to which a few dif...
International audienceContext. The first 1000 km of the ion tail of comet 67P/Churyumov–Gerasimenko ...
Context. The ESA/Rosetta mission made it possible to monitor the plasma environment of a comet, from...
Context. The first long-term in-situ observation of the plasma environment in the vicinity of a come...
Context. Sufficiently far from the Sun, all comets go through a phase of low activity. Rosetta obser...
International audienceAt distances close enough to the Sun, when comets are characterised by a signi...
No spacecraft visiting a comet has been equipped with instruments to directly measure the static ele...
When a comet approaches the Sun, surface ices sublimate and escape into space. When these neutrals a...
Context. The first long-term in-situ observation of the plasma environment in the vicinity of a come...
http://science.sciencemag.org/content/347/6220/aaa0571.fullInternational audienceThe Rosetta mission...
Context. The cometary ionosphere is immersed in fast flowing solar wind. A polarisation electric fie...
International audienceContext. The cometary ionosphere is immersed in fast flowing solar wind. A pol...
Context. The cometary ionosphere is immersed in fast flowing solar wind. A polarisation electric fie...
Context. The cometary ionosphere is immersed in fast flowing solar wind. A polarisation electric fie...
Context. The plasma near the nucleus of a comet is subjected to an electric field to which a few dif...
International audienceContext. The first 1000 km of the ion tail of comet 67P/Churyumov–Gerasimenko ...
Context. The ESA/Rosetta mission made it possible to monitor the plasma environment of a comet, from...
Context. The first long-term in-situ observation of the plasma environment in the vicinity of a come...
Context. Sufficiently far from the Sun, all comets go through a phase of low activity. Rosetta obser...
International audienceAt distances close enough to the Sun, when comets are characterised by a signi...
No spacecraft visiting a comet has been equipped with instruments to directly measure the static ele...
When a comet approaches the Sun, surface ices sublimate and escape into space. When these neutrals a...
Context. The first long-term in-situ observation of the plasma environment in the vicinity of a come...
http://science.sciencemag.org/content/347/6220/aaa0571.fullInternational audienceThe Rosetta mission...