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  • 1
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    Voyager planetary radio astronomy at neptune (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-12-15
    Description: Detection of very intense short radio bursts from Neptune was possible as early as 30 days before closest approach and at least 22 days after closest approach. The bursts lay at frequencies in the range 100 to 1300 kilohertz, were narrowband and strongly polarized, and presumably originated in southern polar regions ofthe planet. Episodes of smooth emissions in the frequency range from 20 to 865 kilohertz were detected during an interval of at least 10 days around closest approach. The bursts and the smooth emissions can be described in terms of rotation in a period of 16.11 +/- 0.05 hours. The bursts came at regular intervals throughout the encounter, including episodes both before and after closest approach. The smooth emissions showed a half-cycle phase shift between the five episodes before and after closest approach. This experiment detected the foreshock of Neptune's magnetosphere and the impacts of dust at the times of ring-plane crossings and also near the time of closest approach. Finally, there is no evidence for Neptunian electrostatic discharges.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warwick, J W -- Evans, D R -- Peltzer, G R -- Peltzer, R G -- Romig, J H -- Sawyer, C B -- Riddle, A C -- Schweitzer, A E -- Desch, M D -- Kaiser, M L -- Farrell, W M -- Carr, T D -- de Pater, I -- Staelin, D H -- Gulkis, S -- Poynter, R L -- Boischot, A -- Genova, F -- Leblanc, Y -- Lecacheux, A -- Pedersen, B M -- Zarka, P -- New York, N.Y. -- Science. 1989 Dec 15;246(4936):1498-501.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17756007" 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
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Tyrannosaur paleobiology: new research on ancient exemplar organisms (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-18
    Description: Tyrannosaurs, the group of dinosaurian carnivores that includes Tyrannosaurus rex and its closest relatives, are icons of prehistory. They are also the most intensively studied extinct dinosaurs, and thanks to large sample sizes and an influx of new discoveries, have become ancient exemplar organisms used to study many themes in vertebrate paleontology. A phylogeny that includes recently described species shows that tyrannosaurs originated by the Middle Jurassic but remained mostly small and ecologically marginal until the latest Cretaceous. Anatomical, biomechanical, and histological studies of T. rex and other derived tyrannosaurs show that large tyrannosaurs could not run rapidly, were capable of crushing bite forces, had accelerated growth rates and keen senses, and underwent pronounced changes during ontogeny. The biology and evolutionary history of tyrannosaurs provide a foundation for comparison with other dinosaurs and living organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brusatte, Stephen L -- Norell, Mark A -- Carr, Thomas D -- Erickson, Gregory M -- Hutchinson, John R -- Balanoff, Amy M -- Bever, Gabe S -- Choiniere, Jonah N -- Makovicky, Peter J -- Xu, Xing -- New York, N.Y. -- Science. 2010 Sep 17;329(5998):1481-5. doi: 10.1126/science.1193304.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USA. sbrusatte@amnh.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20847260" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior, Animal ; *Biological Evolution ; *Dinosaurs/anatomy & histology/growth & development/physiology ; Ecosystem ; *Fossils ; Phylogeny ; Population Dynamics
    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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    Planetary radio astronomy observations from voyager 2 near jupiter (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-11-23
    Description: The Voyager 2 Planetary Radio Astronomy experiment to Jupiter has confirmed and extended to higher zenomagnetic latitudes results from the identical experiment carried by Voyager 1. The kilometric emissions discovered by Voyager 1 often extended to 1 megahertz or higher on Voyager 2 and often consisted of negatively or, less frequently, positively drifting narrowband bursts. On the basis of tentative identification of plasma wave emissions similar to those detected by Voyager 1, the plasma torus associated with Io appeared somewhat denser to Voyager 2 than it did to Voyager 1. We report here on quasiperiodic sinusoidal or impulsive bursts in the broadcast band range of wavelengths (800 to 1800 kilohertz). A Faraday effect appears at decametric frequencies, which probably results from propagation of the radiation near its sources on Jupiter. Finally, we discuss the occurrence of decametric emission in homologous arc families.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pearce, J B -- Riddle, A C -- Warwick, J W -- Alexander, J K -- Desch, M D -- Kaiser, M L -- Thieman, J R -- Carr, T D -- Gulkis, S -- Boischot, A -- Leblanc, Y -- Pedersen, B M -- Staelin, D H -- New York, N.Y. -- Science. 1979 Nov 23;206(4421):991-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17733921" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Planetary radio astronomy observations from voyager 1 near saturn (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-04-10
    Description: The Voyager 1 planetary radio astronomy experiment detected two distinct kinds of radio emissions from Saturn. The first, Saturn kilometric radiation, is strongly polarized, bursty, tightly correlated with Saturn's rotation, and exhibits complex dynamic spectral features somewhat reminiscent of those in Jupiter's radio emission. It appears in radio frequencies below about 1.2 megahertz. The second kind of radio emission, Saturn electrostatic discharge, is unpolarized, extremely impulsive, loosely correlated with Saturn's rotation, and very broadband, appearing throughout the observing range of the experiment (20.4 kilohertz to 40.2 megahertz). Its sources appear to lie in the planetary rings.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warwick, J W -- Pearce, J B -- Evans, D R -- Carr, T D -- Schauble, J J -- Alexander, J K -- Kaiser, M L -- Desch, M D -- Pedersen, M -- Lecacheux, A -- Daigne, G -- Boischot, A -- Barrow, C H -- New York, N.Y. -- Science. 1981 Apr 10;212(4491):239-43.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17783837" 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
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    Voyager 1 planetary radio astronomy observations near jupiter (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-06-01
    Description: We report results from the first low-frequency radio receiver to be transported into the Jupiter magnetosphere. We obtained dramatic new information, both because Voyager was near or in Jupiter's radio emission sources and also because it was outside the relatively dense solar wind plasma of the inner solar system. Extensive radio spectral arcs, from above 30 to about 1 megahertz, occurred in patterns correlated with planetary longitude. A newly discovered kilometric wavelength radio source may relate to the plasma torus near Io's orbit. In situ wave resonances near closest approach define an electron density profile along the Voyager trajectory and form the basis for a map of the torus. Detailed studies are in progress and are out-lined briefly.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warwick, J W -- Pearce, J B -- Riddle, A C -- Alexander, J K -- Desch, M D -- Kaiser, M L -- Thieman, J R -- Carr, T D -- Gulkis, S -- Boischot, A -- Harvey, C C -- Pedersen, B M -- New York, N.Y. -- Science. 1979 Jun 1;204(4396):995-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17800438" 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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  • 6
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    Voyager 2 radio observations of uranus (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-07-04
    Description: Within distances to Uranus of about 6 x 10(6) kilometers (inbound) and 35 x 10(6) kilometers (outbound), the planetary radio astronomy experiment aboard Voyager 2 detected a wide variety of radio emissions. The emission was modulated in a period of 17.24 +/- 0.01 hours, which is identified as the rotation period of Uranus' magnetic field. Of the two poles where the axis of the off-center magnetic dipole (measured by the magnetometer experiment aboard Voyager 2) meets the planetary surface, the one closer to dipole center is now located on the nightside of the planet. The radio emission generally had maximum power and bandwidth when this pole was tipped toward the spacecraft. When the spacecraft entered the nightside hemisphere, which contains the stronger surface magnetic pole, the bandwidth increased dramatically and thereafter remained large. Dynamically evolving radio events of various kinds embedded in these emissions suggest a Uranian magnetosphere rich in magnetohydrodynamic phenomena.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warwick, J W -- Evans, D R -- Romig, J H -- Sawyer, C B -- Desch, M D -- Kaiser, M L -- Alexander, J K -- Carr, T D -- Staelin, D H -- Gulkis, S -- Poynter, R L -- Aubier, M -- Boischot, A -- Leblanc, Y -- Lecacheux, A -- Pedersen, B M -- Zarka, P -- New York, N.Y. -- Science. 1986 Jul 4;233(4759):102-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17812898" 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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  • 7
    Electronic Resource
    Electronic Resource
    Occultation Theory of Jovian Radio Outbursts (1963)
    [s.l.] : Nature Publishing Group
    Nature 199 (1963), S. 267-268 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It is evident that if this theory is correct the observed durations of the noise storms should show a marked correlation with the apparent angular speed of Jupiter relative to the background of fixed stars. From an examination of 16 outbursts recorded by Douglas3 during the period 1957-60, Strom ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/199267a0
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  • 8
    Electronic Resource
    Electronic Resource
    Sources of Radio Noise on the Planet Jupiter (1957)
    [s.l.] : Nature Publishing Group
    Nature 180 (1957), S. 381-381 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A further investigation of the Jupiter radio noise has been made in this laboratory at 18-0 Mc./s., using an eight-dipole aerial array having a beam width, to the half-power points, of about 30 in the east-west direction. A series of daily records were taken from December 31, 1956, to March 8, 1957 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/180381a0
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  • 9
    Electronic Resource
    Electronic Resource
    Ionospheric Modification of the Radio Emission from Jupiter (1960)
    [s.l.] : Nature Publishing Group
    Nature 187 (1960), S. 568-570 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE sporadic long-wave-length radio-frequency energy emitted by the planet Jupiter is received in the form of brief pulses, the majority of which range from about 0-2 to 1-5 sec. in duration. Occasionally the radiation is very intermittent, with pulses occurring singly, or at most in twos or ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/187568b0
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  • 10
    Electronic Resource
    Electronic Resource
    Anomalous Night-Time Reception of a Major Solar Radio Burst (1959)
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 597-598 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The outburst differed from typical Jupiter noise in a number of respects: (1) the relatively smooth rise and fall of the signal was slower by at least an order of magnitude than any previously observed single Jupiter pulse1; (2) no Jupiter pulse had been observed at this Laboratory simultaneously ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/183597a0
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