Rosetta papers with CBK PAN participation
Our research


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

our research

The smallest dust grains in the circumsolar dust cloud are the nanodust particles, i.e., the dust grains with the sizes of a few to a few tens millionth parts of millimeter. They are so small they include just several dozen thousands of atoms.

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Interplanetary space is filled with magnetized plasma from the Sun (the solar wind) and interstellar gas, mainly hydrogen and helium, which continuously flows through the heliosphere. The interstellar atoms are ionized by extreme ultraviolet radiation and the solar wind. In result of ionization of the interstellar atoms, new ions in the solar wind are created.

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The heliosphere is a region in the interstellar space filled with the solar wind plasma, emitted by the Sun. Since the Sun is traversing a partly ionized, magnetized cloud of interstellar gas, the solar wind expansion must be eventually arrested at a certain distance to the Sun. This happens in the locations where the solar wind pressure becomes equal to the pressure of the interstellar matter. Ultimately, however, the solar wind matter cannot accumulate infinitely inside the heliosphere and must find an exit path to the interstellar space. But where exactly is this path located? And is there just one evacuation path or more? These questions cannot be answered directly because up to now there have been just two active space probes – Voyager 1 and 2 – to reach the boundary regions of the heliosphere, and this happened in the regions least suspect of being anywhere close to the solar wind evacuation path. Therefore, answering these question can only be done by remote-sensing measurements and theoretical modeling.

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CBK PAN will participate in a NASA space mission Interstellar Mapping and Acceleration Probe (IMAP), scheduled for launch in 2024. The selection of the winning proposal submitted in response to the Announcement of Opportunity released in 2017, was announced in Washington DC on June 1, 2018 (https://www.nasa.gov/press-release/nasa-selects-mission-to-study-solar-wind-boundary-of-outer-solar-system).

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