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  • Nature Publishing Group (NPG)  (1)
  • 1
    Publication Date: 2014-01-24
    Description: The 'snowline' conventionally divides Solar System objects into dry bodies, ranging out to the main asteroid belt, and icy bodies beyond the belt. Models suggest that some of the icy bodies may have migrated into the asteroid belt. Recent observations indicate the presence of water ice on the surface of some asteroids, with sublimation a potential reason for the dust activity observed on others. Hydrated minerals have been found on the surface of the largest object in the asteroid belt, the dwarf planet (1) Ceres, which is thought to be differentiated into a silicate core with an icy mantle. The presence of water vapour around Ceres was suggested by a marginal detection of the photodissociation product of water, hydroxyl (ref. 12), but could not be confirmed by later, more sensitive observations. Here we report the detection of water vapour around Ceres, with at least 10(26) molecules being produced per second, originating from localized sources that seem to be linked to mid-latitude regions on the surface. The water evaporation could be due to comet-like sublimation or to cryo-volcanism, in which volcanoes erupt volatiles such as water instead of molten rocks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kuppers, Michael -- O'Rourke, Laurence -- Bockelee-Morvan, Dominique -- Zakharov, Vladimir -- Lee, Seungwon -- von Allmen, Paul -- Carry, Benoit -- Teyssier, David -- Marston, Anthony -- Muller, Thomas -- Crovisier, Jacques -- Barucci, M Antonietta -- Moreno, Raphael -- England -- Nature. 2014 Jan 23;505(7484):525-7. doi: 10.1038/nature12918.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Space Agency, European Space Astronomy Centre, PO Box 78, Villanueva de la Canada 28691, Spain. ; Laboratoire d'etudes spatiales et d'instrumentation en astrophysique, Observatoire de Paris, CNRS, Universite Pierre et Marie Curie (UPMC), Universite Paris-Diderot, 5 Place Jules Janssen, 92195 Meudon, France. ; Jet Propulsion Laboratory, Pasadena, 4800 Oak Grove Drive, La Canada Flintridge, California 91011, USA. ; 1] European Space Agency, European Space Astronomy Centre, PO Box 78, Villanueva de la Canada 28691, Spain [2] Institut de Mecanique Celeste et de Calcul des Ephemerides, Observatoire de Paris, Unite Mixte de Recherche (UMR) 8028, CNRS, 77 Avenue Denfert Rochereau, 75014 Paris, France. ; Max-Planck-Institut fur extraterrestrische Physik (MPE), Giessenbachstrasse 1, 85748 Garching, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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