R
Ralph L. McNutt
Researcher at Johns Hopkins University Applied Physics Laboratory
Publications - 372
Citations - 14744
Ralph L. McNutt is an academic researcher from Johns Hopkins University Applied Physics Laboratory. The author has contributed to research in topics: Solar wind & Magnetosphere. The author has an hindex of 57, co-authored 359 publications receiving 12840 citations. Previous affiliations of Ralph L. McNutt include American Astronomical Society & Imperial College London.
Papers
More filters
Journal ArticleDOI
Cassini ion and neutral mass spectrometer: Enceladus plume composition and structure.
J. Hunter Waite,Michael R. Combi,Wing-Huen Ip,Thomas E. Cravens,Ralph L. McNutt,Wayne Kasprzak,Roger V. Yelle,Janet G. Luhmann,Hasso B. Niemann,David A. Gell,Brian Magee,Greg Fletcher,Jonathan I. Lunine,Wei-Ling Tseng +13 more
TL;DR: 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.
Journal ArticleDOI
Liquid water on Enceladus from observations of ammonia and 40Ar in the plume
J. H. Waite,W. S. Lewis,Brian Magee,Jonathan I. Lunine,William B. McKinnon,Christopher R. Glein,Olivier Mousis,Olivier Mousis,D. T. Young,Tim Brockwell,Joseph Westlake,M. J. Nguyen,B. D. Teolis,Hasso B. Niemann,Ralph L. McNutt,Mark E. Perry,Wing-Huen Ip +16 more
TL;DR: McKinnon et al. as mentioned in this paper reported that ammonia is present in the plume, along with various organic compounds, deuterium and, very probably, Ar-40, which provides strong evidence for the existence of at least some liquid water, given that temperatures in excess of 180 K have been measured near the fractures from which the jets emanate.
Journal ArticleDOI
Ion Neutral Mass Spectrometer Results from the First Flyby of Titan
J. Hunter Waite,Hasso B. Niemann,Roger V. Yelle,Wayne Kasprzak,Thomas E. Cravens,Janet G. Luhmann,Ralph L. McNutt,Wing-Huen Ip,David A. Gell,Virginie De La Haye,Ingo Müller-Wordag,Brian Magee,N. Borggren,S. Ledvina,Greg Fletcher,Erin Walter,Ryan M. Miller,Stefan Scherer,Rob Thorpe,Jing Xu,Bruce P. Block,Ken Arnett +21 more
TL;DR: 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.
Journal ArticleDOI
The Pluto system: Initial results from its exploration by New Horizons.
S. A. Stern,Fran Bagenal,Kimberly Ennico,G. R. Gladstone,William M. Grundy,William B. McKinnon,J. M. Moore,Catherine B. Olkin,John R. Spencer,Harold A. Weaver,Leslie A. Young,Tom Andert,Jane M. Andrews,M. E. Banks,B. Bauer,Jeremy Bauman,Olivier S. Barnouin,Peter D. Bedini,K. B. Beisser,Ross A. Beyer,S. Bhaskaran,Richard P. Binzel,Emma Birath,Mike Bird,D. J. Bogan,Alice Bowman,Veronica J. Bray,M. Brozovic,C. Bryan,Matthew R. Buckley,Marc W. Buie,Bonnie J. Buratti,Stewart Bushman,Andrew B. Calloway,Brian Carcich,Andrew F. Cheng,Steven J. Conard,C. A. Conrad,Jason C. Cook,Dale P. Cruikshank,O. S. Custodio,C. M. Dalle Ore,C. C. Deboy,Zach Dischner,Philip J. Dumont,Alissa M. Earle,H. A. Elliott,J. Ercol,Carolyn M. Ernst,Tiffany J. Finley,Sarah H. Flanigan,Glen H. Fountain,M. J. Freeze,Thomas K. Greathouse,James L. Green,Yanping Guo,Matthias Hahn,Douglas P. Hamilton,Sarah A. Hamilton,Jennifer Hanley,A. Harch,H. M. Hart,Chris B. Hersman,A. Hill,Matthew E. Hill,David P. Hinson,Mark E. Holdridge,Mihaly Horanyi,Alan D. Howard,Carly Howett,Coralie D. Jackman,Robert A. Jacobson,D. E. Jennings,Joshua A. Kammer,H. K. Kang,David E. Kaufmann,Peter Kollmann,Stamatios M. Krimigis,David Y. Kusnierkiewicz,Tod R. Lauer,J. E. Lee,K. L. Lindstrom,Ivan Linscott,Carey M. Lisse,Allen W. Lunsford,V. A. Mallder,Nicole Martin,David J. McComas,Ralph L. McNutt,Douglas S. Mehoke,Thomas Mehoke,E. D. Melin,Max Mutchler,Derek S. Nelson,Francis Nimmo,Jorge I. Nunez,A. C. Ocampo,William M. Owen,Martin Paetzold,B. Page,Alex Parker,Joel Wm. Parker,Frederic Pelletier,J. Peterson,Nickalaus Pinkine,M. Piquette,Simon B. Porter,Silvia Protopapa,Jillian Redfern,Harold J. Reitsema,D. C. Reuter,James H. Roberts,Stuart J. Robbins,Gabe Rogers,Debi Rose,Kirby Runyon,Kurt D. Retherford,M. G. Ryschkewitsch,Paul M. Schenk,Eric Schindhelm,B. Sepan,Mark R. Showalter,Kelsi N. Singer,M. Soluri,Dale Stanbridge,Andrew J. Steffl,Darrell F. Strobel,T. Stryk,Michael E. Summers,Jamey Szalay,M. B. Tapley,A. Taylor,H. W. Taylor,Henry B. Throop,Constantine Tsang,G. L. Tyler,Orkan M. Umurhan,A. J. Verbiscer,M. H. Versteeg,Michael Vincent,R. W. Webbert,S. Weidner,G. Weigle,Oliver L. White,Karl Whittenburg,B. G. Williams,Kaj E. Williams,S. P. Williams,W. W. Woods,Amanda M. Zangari,Eric J. Zirnstein +150 more
TL;DR: The New Horizons encounter revealed that Pluto displays a surprisingly wide variety of geological landforms, including those resulting from glaciological and surface-atmosphere interactions as well as impact, tectonic, possible cryovolcanic, and mass-wasting processes.
Journal ArticleDOI
The Major-Element Composition of Mercury’s Surface from MESSENGER X-ray Spectrometry
Larry R. Nittler,R. D. Starr,Shoshana Z. Weider,Timothy J. McCoy,William V. Boynton,Denton S. Ebel,Carolyn M. Ernst,Larry G. Evans,John O. Goldsten,D. K. Hamara,David J. Lawrence,Ralph L. McNutt,C. E. Schlemm,Sean C. Solomon,Ann L. Sprague +14 more
TL;DR: X-ray fluorescence spectra obtained by the MESSENGENGER spacecraft orbiting Mercury indicate that the planet's surface differs in composition from those of other terrestrial planets as discussed by the authors, and this observation, together with a low surface Fe abundance, supports the view that Mercury formed from highly reduced precursor materials, perhaps akin to enstatite chondrite meteorites or anhydrous cometary dust particles.