Search Results - (Author, Cooperation:L. Iess)
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1Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2013-08-30Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
2Latest Papers from Table of Contents or Articles in PressL. Iess ; D. J. Stevenson ; M. Parisi ; D. Hemingway ; R. A. Jacobson ; J. I. Lunine ; F. Nimmo ; J. W. Armstrong ; S. W. Asmar ; M. Ducci ; P. Tortora
American Association for the Advancement of Science (AAAS)
Published 2014Staff ViewPublication Date: 2014-04-05Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Extraterrestrial Environment ; *Gravitation ; Ice ; *Saturn ; Spacecraft ; *WaterPublished by: -
3Latest Papers from Table of Contents or Articles in PressL. Iess ; R. A. Jacobson ; M. Ducci ; D. J. Stevenson ; J. I. Lunine ; J. W. Armstrong ; S. W. Asmar ; P. Racioppa ; N. J. Rappaport ; P. Tortora
American Association for the Advancement of Science (AAAS)
Published 2012Staff ViewPublication Date: 2012-06-30Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Extraterrestrial Environment ; Gravitation ; Ice ; *Saturn ; Spacecraft ; *WaterPublished by: -
4Articles: DFG German National LicensesStaff View
ISSN: 1089-7666Source: AIP Digital ArchiveTopics: PhysicsNotes: The expansion of the plasma emitted by a hollow cathode source and its interaction with an ambient ionospheric plasma are described in a spherically symmetric, stationary, fluid model, which includes anomalous collisions due to ion acoustic or Buneman instability. Currents and potential profiles are self-consistently computed for different densities and polarizations of the hollow cathode plasma. The model indicates that the region where the potential has suprathermal values is quite large and that hollow cathodes strongly enhance the charge collection of a polarized body from the ambient plasma. These results are significant to the problem of power generation via tethered systems in space.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesArmstrong, J. W. ; Asmar, S. W. ; Burns, J. A. ; Denk, T. ; Giese, B. ; Helfenstein, P. ; Iess, L. ; Johnson, T. V. ; McEwen, A. ; Nicolaisen, L. ; Porco, C. ; Rappaport, N. ; Richardson, J. ; Somenzi, L. ; Tortora, P. ; Turtle, E. P. ; Veverka, J. ; Thomas, P. C.
[s.l.] : Nature Publishing Group
Published 2007Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Hyperion is Saturn’s largest known irregularly shaped satellite and the only moon observed to undergo chaotic rotation. Previous work has identified Hyperion’s surface as distinct from other small icy objects but left the causes unsettled. Here we report high-resolution images that ...Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] According to general relativity, photons are deflected and delayed by the curvature of space-time produced by any mass. The bending and delay are proportional to γ + 1, where the parameter γ is unity in general relativity but zero in the newtonian model of gravity. The quantity ...Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesStaff View
ISSN: 0273-1177Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPhysicsType of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 1572-9532Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We discuss the prospect of detecting a gravitational wave background by means of a simultaneous Doppler tracking of two spacecraft. We find that the cross spectrum of the Doppler shifts of the two spacecraft is a filtered expression of the energy density spectrum of the background. The filter function, which is expressed as a series in terms of Legendre polynomials, is obtained by an integration over the rotation group, assuming the background to be isotropic. We examine the main noise sources and point out the advantages of a measurement with two spacecraft.Type of Medium: Electronic ResourceURL: