Zobrazeno 1 - 10 of 87 pro vyhledávání: '"D. E. Shemansky"'
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Composition of Titan's upper atmosphere from Cassini UVIS EUV stellar occultations
Autor: D. E. Shemansky, Xi Zhang, Joshua A. Kammer, Yuk L. Yung
Publikováno v: Planetary and Space Science. 88:86-92
Identifying seasonal and spatial variability in Titan's atmospheric structure is a key factor in improving theoretical models of atmospheric loss and understanding the physical processes that control the loss rate. In this work, the extreme ultraviol
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9640966802af39d87865be6e5ca35b0e
https://doi.org/10.1016/j.pss.2013.08.003
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3
Saturn upper atmospheric structure from Cassini EUV and FUV occultations 1This article is part of a Special Issue that honours the work of Dr. Donald M. Hunten FRSC who passed away in December 2010 after a very illustrious career
Autor: X. Liu, D. E. Shemansky
Publikováno v: Canadian Journal of Physics. 90:817-831
Stellar occultations of the Saturn atmosphere using the Cassini ultraviolet imaging spectrograph (UVIS) experiment have provided vertical structure at a range of latitudes. The transmission spectra in the extreme–far ultraviolet (EUV–FUV) range a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b613ff7acbc342b4bb463424bd69b82b
https://doi.org/10.1139/p2012-036
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4
Radiation transport of heliospheric Lyman-α from combined Cassini and Voyager data sets
Autor: Wayne Pryor, P. Gangopadhyay, T. Forrester, Ian Stewart, William E. McClintock, Yury G. Malama, D. E. Shemansky, Eberhard Möbius, A. Jouchoux, Joshua Colwell, K. Tobiska, Joseph M. Ajello, Candice Hansen, Bill R. Sandel, Eric Quémerais, Vlad Izmodenov, Larry W. Esposito, Maciej Bzowski
Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2008, 491 (1), pp.21-28. ⟨10.1051/0004-6361:20078862⟩
Astronomy and Astrophysics-A&A, 2008, 491 (1), pp.21-28. ⟨10.1051/0004-6361:20078862⟩
Heliospheric neutral hydrogen scatters solar Lyman-alpha radiation from the Sun with '27-day' intensity modulations observed near Earth due to the Sun's rotation combined with Earth's orbital motion. These modulations are increasingly damped in ampli
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28cd6f2135970a23c38bdf897f055636
https://doi.org/10.1051/0004-6361:20078862
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6
Electron-impact excitation and emission cross sections of the H2Lyman and Werner Systems
Autor: Xianming Liu, S.M. Ahmed, Joseph M. Ajello, D. E. Shemansky, G. K. James
Publikováno v: Journal of Geophysical Research: Space Physics. 103:26739-26758
Excitation functions of the H2 Lyman (Ly) ( B1∑∑u - X1∑∑g) and Werner (W) (C1∏u - X1∑∑g ) band systems have been reanalyzed using a combination of measurements and theoretical considerations. These systems are prominent emitters in oute
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::72617275cd1833299d8615b3b1e47e90
https://doi.org/10.1029/98ja02721
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7
THE SATURN HOT ATOMIC HYDROGEN PLUME: QUANTUM MECHANICAL INVESTIGATION OF H2 DISSOCIATION MECHANISMS
Autor: H. Melin, Xianming Liu, I. Kanik, J. A. Young, P. V. Johnson, D. E. Shemansky, C. P. Malone
XIANMING LIU∗,§, D. E. SHEMANSKY†,¶, P. V. JOHNSON∗,‖, C. P. MALONE‡, H. MELIN†, J. A. YOUNG∗ and I. KANIK∗,∗∗ ∗Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA †Planetary and Space Scie
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::febb99a07878cadee209611d0a580d54
https://doi.org/10.1142/9789812838162_0030
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8
Microchannel plate life tests
Autor: Bill R. Sandel, A. L. Broadfoot, D. E. Shemansky
Publikováno v: Applied optics. 16(5)
We have investigated the manner in which the gain of a microchannel plate (MCP) changes as the plate is operated at moderate output currents. We find that the total charge per unit area Q (C-cm(-2)) extracted from the MCP is the relevant quantity for
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96592008d3b68bc32fa8b95e8e9b5ad8
https://pubmed.ncbi.nlm.nih.gov/20168714
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9
The extreme ultraviolet emission spectrum of CO produced by electron impact at 20 and 200 eV
Autor: G. K. James, Brian D. Franklin, Joseph M. Ajello, Isik Kanik, D. E. Shemansky
Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 25:1481-1496
In this first part of a laboratory study of predissociation in CO the authors have measured in the electron-impact-induced fluorescence spectrum of CO in the wavelength range 40-125 nm at a spectral resolution of 0.5 nm. The experiment was performed
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::acbc22152700f7afe4fc68380abf6fce
https://doi.org/10.1088/0953-4075/25/7/019
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10
The abundance of O++in the Jovian magnetosphere
Autor: Ralph L. McNutt, D. E. Shemansky, R. Schreier, Fran Bagenal, Aharon Eviatar
Publikováno v: Geophysical Research Letters. 19:79-82
From a synthesis of data from the Plasma Science and Ultraviolet Science instruments on the Voyager 1 spacecraft we present a radial profile of O ++ abundance between 4.9 and 42 Rj. We observe a sharp rise in O ++ mixing ratio near 7.5 RI, coincident
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ab7030bae70fcef8d80ed6d2659bde10
https://doi.org/10.1029/92gl00070
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