Rosetta papers with CBK PAN participation
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The first is an overview paper by H. Sierks et al. entitled "On the nucleus structure and activity of comet 67P/Churyumov-Gerasimenko". The second gives a preliminary but detailed account of the features seen on the nucleus surface. This is by N. Thomas et al. and is entitled "The morphological diversity of comet 67P/Churyumov-Gerasimenko". The third describes OSIRIS imaging of dust grains in the surroundings of the nucleus by A. Rotundi et al. and is entitled "Dust measurements in the coma of comet 67P/Churyumov-Gerasimenko inbound to the Sun between 3.7 and 3.4 AU". The fourth by F.Cappacioni et al., entitled ,,The organic-rich surface of comet 67P/Churyumov-Gerasimenko as seen by VIRTIS/Rosetta'' describes types of substances seen in visible and infrared ranges of spectra obtained in different areas of cometary surface.

 

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Hans Rickman

 

Last Updated on Tuesday, 27 January 2015 11:46
 

Our research

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Interstellar neutral atoms of helium from the local interstellar medium are observed by the Interstellar Boundary Explorer (IBEX) spacecraft in the Earth orbit. Researchers from CBK PAN, together with international collaborators, analyze these observations to determine the Sun’s motion with respect to the local interstellar medium and the temperature of this medium. In a broader perspective, results of these analyses provide important insight into mechanisms of interaction of the heliosphere with its surroundings. In a paper recently published in The Astrophysical Journal they analyzed data from two energy channels of the IBEX-Lo detector previously not used, in addition to the data from the channel used beforehand, and obtained a better assessment of these quantities.

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Lyman-alpha line is one of the most prominent features in the UV part of the solar spectrum. It allows us to estimate the magnitude of radiation pressure, which is a force that photons from the Sun exert on hydrogen atoms. Radiation pressure is, next to the gravitational force, the main factor that determines the trajectories of neutral hydrogen and deuterium atoms inside the heliosphere.

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Turbulence is a complex phenomenon with driving mechanisms still not clearly understood in contemporary science. Turbulence naturally appears in astrophysical plasmas, including the solar wind at planetary and interstellar shocks. The shocks in astrophysical plasmas are usually collisionless due to a very low density of the medium and therefore they differ from those observed in ordinary fluids, because they often result from interaction of nonlinear structures.

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Sample return space missions are one of the possible options to extend our knowledge about extra-terrestrial materials, processes occurring on surface and subsurface level, as well as interactions between regolith and technology. Collection of surface or subsurface material from such bodies is a key technical process that needs to be performed to achieve the goals of such missions. Although in terrestrial environment the sampling process is relatively easy, smart solutions are needed for zero gravity, unknown and remotely accessible space environment.

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