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  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2000-05-20
    Description: Spectroscopy of Io's Pele plume against Jupiter by the Hubble Space Telescope in October 1999 revealed absorption due to S2 gas, with a column density of 1.0 +/- 0.2 x 10(16) per square centimeter, and probably also SO(2) gas with a column density of 7 +/- 3 x 10(16) per square centimeter. This SO2/S2 ratio (3 to 12) is expected from equilibration with silicate magmas near the quartz-fayalite-magnetite or wustite-magnetite buffers. Condensed S3 and S4, probable coloring agents in Pele's red plume deposits, may form by polymerization of the S2, which is unstable to ultraviolet photolysis. Diffuse red deposits near other Io volcanoes suggest that venting and polymerization of S2 gas is a widespread feature of Io volcanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spencer, J R -- Jessup, K L -- McGrath, M A -- Ballester, G E -- Yelle, R -- New York, N.Y. -- Science. 2000 May 19;288(5469):1208-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001, USA. spencer@lowell.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10817990" target="_blank"〉PubMed〈/a〉
    Keywords: Extraterrestrial Environment ; *Gases ; *Jupiter ; Spacecraft ; Spectrum Analysis ; *Sulfur ; Sulfur Dioxide ; *Volcanic Eruptions
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1999-01-15
    Description: Well-resolved far-ultraviolet spectroscopic images of O I, S I, and previously undetected H ILyman-alpha emission from Io were obtained with the Hubble space telescope imaging spectrograph (STIS). Detected O I and S I lines (1250 to 1500 angstroms) have bright equatorial spots (up to 2.5 kilorayleighs) that shift position with jovian magnetic field orientation; limb glow that is brighter on the hemisphere facing the jovian magnetic equator; and faint diffuse emission extending to approximately 20 Io radii. All O I and S I features brightened by approximately 50 percent in the last two images, concurrently with a ground-based observation of increased iogenic [O I] 6300-angstrom emission. The H ILyman-alpha emission, consisting of a small, approximately 2-kilorayleigh patch near each pole, has a different morphology and time variation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roesler, F L -- Moos, H W -- Oliversen, R J -- Woodward, R C Jr -- Retherford, K D -- Scherb, F -- McGrath, M A -- Smyth, W H -- Feldman, P D -- Strobel, D F -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):353-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Physics Department, University of Wisconsin, 1150 University Avenue, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9888844" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; *Extraterrestrial Environment ; *Hydrogen ; *Jupiter ; Magnetics ; *Oxygen ; Spectrophotometry, Ultraviolet ; *Sulfur
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1997-10-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGrath, M A -- New York, N.Y. -- Science. 1997 Oct 10;278(5336):237-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Space Telescope Science Institute, Baltimore, MD 21218, USA. mcgrath@stci.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9340770" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; *Extraterrestrial Environment ; *Jupiter ; Temperature
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2013-12-18
    Description: In November and December 2012, the Hubble Space Telescope (HST) imaged Europa's ultraviolet emissions in the search for vapor plume activity. We report statistically significant coincident surpluses of hydrogen Lyman-alpha and oxygen OI 130.4-nanometer emissions above the southern hemisphere in December 2012. These emissions were persistently found in the same area over the 7 hours of the observation, suggesting atmospheric inhomogeneity; they are consistent with two 200-km-high plumes of water vapor with line-of-sight column densities of about 10(20) per square meter. Nondetection in November 2012 and in previous HST images from 1999 suggests varying plume activity that might depend on changing surface stresses based on Europa's orbital phases. The plume was present when Europa was near apocenter and was not detected close to its pericenter, in agreement with tidal modeling predictions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roth, Lorenz -- Saur, Joachim -- Retherford, Kurt D -- Strobel, Darrell F -- Feldman, Paul D -- McGrath, Melissa A -- Nimmo, Francis -- New York, N.Y. -- Science. 2014 Jan 10;343(6167):171-4. doi: 10.1126/science.1247051. Epub 2013 Dec 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Southwest Research Institute, San Antonio, TX, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24336567" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 1995-03-03
    Description: Ultraviolet spectra obtained with the Hubble Space Telescope identified at least 10 molecules and atoms in the perturbed stratosphere near the G impact site, most never before observed in Jupiter. The large mass of sulfur-containing material, more than 10(14) grams in S2 alone, indicates that many of the sulfur-containing molecules S2, CS2, CS, H2S, and S+ may be derived from a sulfur-bearing parent molecule native to Jupiter. If so, the fragment must have penetrated at least as deep as the predicted NH4SH cloud at a pressure of approximately 1 to 2 bars. Stratospheric NH3 was also observed, which is consistent with fragment penetration below the cloud tops. Approximately 10(7) grams of neutral and ionized metals were observed in emission, including Mg II, Mg I, Si I, Fe I, and Fe II. Oxygen-containing molecules were conspicuous by their absence; upper limits for SO2, SO, CO, SiO, and H2O are derived.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Noll, K S -- McGrath, M A -- Trafton, L M -- Atreya, S K -- Caldwell, J J -- Weaver, H A -- Yelle, R V -- Barnet, C -- Edgington, S -- New York, N.Y. -- Science. 1995 Mar 3;267(5202):1307-13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Space Telescope Science Institute, Baltimore, MD 21218.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7871428" target="_blank"〉PubMed〈/a〉
    Keywords: Ammonia/analysis ; Atmosphere ; Carbon Disulfide/analysis ; *Extraterrestrial Environment ; Iron/analysis ; *Jupiter ; Magnesium/analysis ; Oxygen/analysis ; *Solar System ; Spectrum Analysis ; Sulfur/analysis ; Water/analysis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 1995-03-03
    Description: Spectroscopic and imaging observations of the Io plasma torus were made in June and July 1994 in conjunction with the encounter of periodic comet Shoemaker-Levy 9 with Jupiter. Characteristic emissions from sulfur and oxygen ions showed a decline of about 30 percent in the extreme ultraviolet and an increase of about 40 percent in the far ultraviolet relative to preimpact observations. Changes in the extreme ultraviolet may be indicative of small changes in the torus electron temperature as a result of quenching of electrons by dust associated with the comet passage. However, no new emission features indicative of fragment dust within the torus were detected. The characteristic torus morphology seen in ground-based imaging was typical of that observed in the past.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGrath, M A -- Hall, D T -- Matheson, P L -- Weaver, H A -- Trauger, J T -- Smith, T E -- Thomas, N -- Gladstone, R -- Schneider, N M -- Harris, W M -- New York, N.Y. -- Science. 1995 Mar 3;267(5202):1313-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Space Telescope Science Institute, Baltimore, MD 21218.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7871429" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; *Extraterrestrial Environment ; *Jupiter ; Magnetics ; *Solar System ; Sulfur/analysis ; Temperature
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1996-04-26
    Description: Just before earth passed through Saturn's ring plane on 10 August 1995, the Hubble Space Telescope Faint Object Spectrograph detected ultraviolet fluorescent emissions from a tenuous atmosphere of OH molecules enveloping the rings. Brightnesses decrease with increasing distance above the rings, implying a scale height of about 0.45 Saturn radii (Rs). A spatial scan 0.28Rs above the A and B rings indicates OH column densities of about 10(13) cm(-2) and number densities of up to 700 cm(-3). Saturn's rings must produce roughly 10(25) to 10(29) OH molecules per second to maintain the observed OH distribution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hall, D T -- Feldman, P D -- Holberg, J B -- McGrath, M A -- New York, N.Y. -- Science. 1996 Apr 26;272(5261):516-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Astrophysical Sciences, Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8614798" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; *Extraterrestrial Environment ; Hydroxyl Radical/*analysis ; *Saturn
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 323 (1986), S. 694-696 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We take the exospheric column density of the observed Na to be N - F8t where F5 is the supply flux of Na to the 'atmosphere' and t is the lifetime of a Na atom in this atmosphere. If the source is a sputter (desorption) source we can write F.? = F?/?? where F? is the stimulating radiation flux of ...
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 373 (1995), S. 677-679 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In an observation specifically designed to detect an oxygen atmosphere, the Hubble Space Telescope (HST) observed Europa during six consecutive spacecraft orbits on 2 June 1994 using the square 1.74x 1.74arcsec aperture and far-ultraviolet grating (G140L) of the Goddard High Resolution Spectrograph ...
    Type of Medium: Electronic Resource
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  • 10
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