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  • 1
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    Oxygen ions observed near Saturn's A ring (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2005-02-26
    Beschreibung: Ions were detected in the vicinity of Saturn's A ring by the Ion and Neutral Mass Spectrometer (INMS) instrument onboard the Cassini Orbiter during the spacecraft's passage over the rings. The INMS saw signatures of molecular and atomic oxygen ions and of protons, thus demonstrating the existence of an ionosphere associated with the A ring. A likely explanation for these ions is photoionization by solar ultraviolet radiation of neutral O2 molecules associated with a tenuous ring atmosphere. INMS neutral measurements made during the ring encounter are dominated by a background signal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Waite, J H Jr -- Cravens, T E -- Ip, W-H -- Kasprzak, W T -- Luhmann, J G -- McNutt, R L -- Niemann, H B -- Yelle, R V -- Mueller-Wodarg, I -- Ledvina, S A -- Scherer, S -- New York, N.Y. -- Science. 2005 Feb 25;307(5713):1260-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Atmospheric, Oceanic, and Space Physics, University of Michigan, Ann Arbor, MI 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15731442" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Atmosphere ; Extraterrestrial Environment ; Ice ; Ions ; Mass Spectrometry ; *Oxygen ; Protons ; *Saturn ; Spacecraft
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
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    Ion neutral mass spectrometer results from the first flyby of Titan (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2005-05-14
    Beschreibung: The Cassini Ion Neutral Mass Spectrometer (INMS) has obtained the first in situ composition measurements of the neutral densities of molecular nitrogen, methane, molecular hydrogen, argon, and a host of stable carbon-nitrile compounds in Titan's upper atmosphere. INMS in situ mass spectrometry has also provided evidence for atmospheric waves in the upper atmosphere and the first direct measurements of isotopes of nitrogen, carbon, and argon, which reveal interesting clues about the evolution of the atmosphere. The bulk composition and thermal structure of the moon's upper atmosphere do not appear to have changed considerably since the Voyager 1 flyby.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Waite, J Hunter Jr -- Niemann, Hasso -- Yelle, Roger V -- Kasprzak, Wayne T -- Cravens, Thomas E -- Luhmann, Janet G -- McNutt, Ralph L -- Ip, Wing-Huen -- Gell, David -- De La Haye, Virginie -- Muller-Wordag, Ingo -- Magee, Brian -- Borggren, Nathan -- Ledvina, Steve -- Fletcher, Greg -- Walter, Erin -- Miller, Ryan -- Scherer, Stefan -- Thorpe, Rob -- Xu, Jing -- Block, Bruce -- Arnett, Ken -- New York, N.Y. -- Science. 2005 May 13;308(5724):982-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, MI 48109-2143, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15890873" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Argon ; Atmosphere ; Carbon Isotopes ; *Elements ; Evolution, Planetary ; Extraterrestrial Environment ; *Hydrocarbons ; Hydrogen ; Isotopes ; Mass Spectrometry ; Methane ; Nitriles ; Nitrogen ; Nitrogen Isotopes ; *Saturn ; Spacecraft ; Temperature
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
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    Cassini ion and neutral mass spectrometer: Enceladus plume composition and structure (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2006-03-11
    Beschreibung: The Cassini spacecraft passed within 168.2 kilometers of the surface above the southern hemisphere at 19:55:22 universal time coordinated on 14 July 2005 during its closest approach to Enceladus. Before and after this time, a substantial atmospheric plume and coma were observed, detectable in the Ion and Neutral Mass Spectrometer (INMS) data set out to a distance of over 4000 kilometers from Enceladus. INMS data indicate that the atmospheric plume and coma are dominated by water, with significant amounts of carbon dioxide, an unidentified species with a mass-to-charge ratio of 28 daltons (either carbon monoxide or molecular nitrogen), and methane. Trace quantities (〈1%) of acetylene and propane also appear to be present. Ammonia is present at a level that does not exceed 0.5%. The radial and angular distributions of the gas density near the closest approach, as well as other independent evidence, suggest a significant contribution to the plume from a source centered near the south polar cap, as distinct from a separately measured more uniform and possibly global source observed on the outbound leg of the flyby.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Waite, J Hunter Jr -- Combi, Michael R -- Ip, Wing-Huen -- Cravens, Thomas E -- McNutt, Ralph L Jr -- Kasprzak, Wayne -- Yelle, Roger -- Luhmann, Janet -- Niemann, Hasso -- Gell, David -- Magee, Brian -- Fletcher, Greg -- Lunine, Jonathan -- Tseng, Wei-Ling -- New York, N.Y. -- Science. 2006 Mar 10;311(5766):1419-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, MI 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16527970" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Ammonia/analysis ; Atmosphere ; Carbon Dioxide/analysis ; Evolution, Planetary ; *Extraterrestrial Environment/chemistry ; Mass Spectrometry ; Methane/analysis ; *Saturn ; Spacecraft ; Water/analysis
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
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