D
D. A. Papanastassiou
Researcher at California Institute of Technology
Publications - 150
Citations - 12820
D. A. Papanastassiou is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Meteorite & Chondrite. The author has an hindex of 56, co-authored 147 publications receiving 12298 citations. Previous affiliations of D. A. Papanastassiou include Jet Propulsion Laboratory.
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Journal ArticleDOI
Ca isotope fractionation on the Earth and other solar system materials
TL;DR: In this paper, it was demonstrated that differences in the Ca/^(44)Ca ratio due to mass dependent isotope fractionation in nature are clearly resolvable to a level of 0.001.
Journal ArticleDOI
Comet 81P/Wild 2 under a microscope.
Donald E. Brownlee,Peter Tsou,Jérôme Aléon,Conel M. O'd. Alexander,Tohru Araki,Saša Bajt,G. A. Baratta,Ron K. Bastien,Phil Bland,Phil Bland,Pierre Bleuet,Janet Borg,John P. Bradley,Adrian J. Brearley,Frank E. Brenker,Sean Brennan,John Bridges,Nigel D. Browning,Nigel D. Browning,John Robert Brucato,Emma S. Bullock,Mark J. Burchell,Henner Busemann,Anna L. Butterworth,Marc Chaussidon,Allan Cheuvront,Miaofang Chi,Mark J. Cintala,Benton C. Clark,Simon J. Clemett,George D. Cody,Luigi Colangeli,George Cooper,Patrick Cordier,Charles P. Daghlian,Zu Rong Dai,Louis Le Sergeant d'Hendecourt,Zahia Djouadi,Gerardo Dominguez,Tom Duxbury,Jason P. Dworkin,Denton S. Ebel,Thanasis E. Economou,Sirine C. Fakra,Sam A. J. Fairey,Stewart Fallon,G. Ferrini,T. Ferroir,Holger Fleckenstein,Christine Floss,George J. Flynn,Ian A. Franchi,Marc Fries,Zack Gainsforth,J-P Gallien,M. J. Genge,Mary K. Gilles,Philipe Gillet,Jamie Gilmour,Daniel P. Glavin,Matthieu Gounelle,Monica M. Grady,Giles A. Graham,Patrick G. Grant,Simon F. Green,F. Grossemy,Lawrence Grossman,Jeffrey N. Grossman,Yunbin Guan,Kenji Hagiya,Ralph P. Harvey,Philipp R. Heck,Gregory F. Herzog,Peter Hoppe,Friedrich Hörz,Joachim Huth,Ian D. Hutcheon,Konstantin Ignatyev,Hope A. Ishii,Motoo Ito,Damien Jacob,Chris Jacobsen,Stein B. Jacobsen,Steven Jones,David J. Joswiak,A. J. G. Jurewicz,Anton T. Kearsley,Lindsay P. Keller,H Khodja,A. L. David Kilcoyne,Jochen Kissel,Alexander N. Krot,Falko Langenhorst,Antonio Lanzirotti,Loan Le,Laurie A. Leshin,Jan Leitner,Laurence Lemelle,Hugues Leroux,Ming-Chang Liu,K. Luening,Ian C. Lyon,G. J. MacPherson,Matthew A. Marcus,Kuljeet K. Marhas,Bernard Marty,Graciela Matrajt,Kevin D. McKeegan,Anders Meibom,Vito Mennella,Keiko Messenger,Scott Messenger,Takashi Mikouchi,Smail Mostefaoui,Tomoki Nakamura,T Nakano,Matthew Newville,Larry R. Nittler,Ichiro Ohnishi,Kazumasa Ohsumi,Kyoko Okudaira,D. A. Papanastassiou,Russ Palma,Russ Palma,Maria Elisabetta Palumbo,Robert O. Pepin,David Perkins,Murielle C. Perronnet,Piero Pianetta,William Rao,Frans J. M. Rietmeijer,François Robert,Detlef Rost,Alessandra Rotundi,R. E. Ryan,Scott A. Sandford,Craig S. Schwandt,Thomas H. See,D. J. Schlutter,J. Sheffield-Parker,Alexandre Simionovici,Steven B. Simon,I Sitnitsky,Christopher J. Snead,Maegan K. Spencer,Frank J. Stadermann,Andrew Steele,Thomas Stephan,Rhonda M. Stroud,Jean Susini,Stephen R. Sutton,Y Suzuki,Mitra L. Taheri,Susan Taylor,Nick Teslich,Kazu Tomeoka,Naotaka Tomioka,Alice Toppani,Josep M. Trigo-Rodríguez,David Troadec,Akira Tsuchiyama,Anthony J. Tuzzolino,Tolek Tyliszczak,Kentaro Uesugi,Michael A. Velbel,Joe Vellenga,Edward P. Vicenzi,Laszlo Vincze,J. Warren,Iris Weber,M. K. Weisberg,Andrew J. Westphal,Sue Wirick,Diane H. Wooden,Brigitte Wopenka,Penelope J. Wozniakiewicz,Ian Wright,Hikaru Yabuta,Hajime Yano,Edward D. Young,Richard N. Zare,Thomas J. Zega,Karen Ziegler,Laurent Zimmerman,Ernst Zinner,Michael E. Zolensky +185 more
TL;DR: The Stardust spacecraft collected thousands of particles from comet 81P/Wild 2 and returned them to Earth for laboratory study, and preliminary examination shows that the nonvolatile portion of the comet is an unequilibrated assortment of materials that have both presolar and solar system origin.
Journal ArticleDOI
Isotopic evidence for a terminal lunar cataclysm
TL;DR: In this paper, it was shown that highland samples from widely separated areas bear the imprint of an event or series of events in a narrow time interval which can be identified with a cataclysmic impacting rate of the moon at about 3.9 aeons.
Journal ArticleDOI
Negative thermal ion mass spectrometry of osmium, rhenium, and iridium
TL;DR: In this article, a negative thermal ion mass spectrometer was used to obtain intense ion beams of negatively charged oxides of Os, Re and Ir by thermal ionization, in a conventional surface ionization mass analyzer.
Journal ArticleDOI
Mineralogy and petrology of comet 81P/wild 2 nucleus samples
Michael E. Zolensky,Thomas J. Zega,Hajime Yano,Sue Wirick,Andrew J. Westphal,M. K. Weisberg,Iris Weber,J. Warren,Michael A. Velbel,Akira Tsuchiyama,Peter Tsou,Alice Toppani,Naotaka Tomioka,Kazushige Tomeoka,Nick Teslich,Mitra L. Taheri,Jean Susini,Rhonda M. Stroud,Thomas Stephan,Frank J. Stadermann,Christopher J. Snead,Steven B. Simon,Alexandre Simionovici,Thomas H. See,François Robert,Frans J. M. Rietmeijer,William Rao,Murielle C. Perronnet,D. A. Papanastassiou,Kyoko Okudaira,Kazumasa Ohsumi,Ichiro Ohnishi,Keiko Nakamura-Messenger,Tomoki Nakamura,Smail Mostefaoui,Takashi Mikouchi,Anders Meibom,Graciela Matrajt,Matthew A. Marcus,Hugues Leroux,Laurence Lemelle,Loan Le,Antonio Lanzirotti,Falko Langenhorst,Alexander N. Krot,Lindsay P. Keller,Anton T. Kearsley,David J. Joswiak,Damien Jacob,Hope A. Ishii,Ralph P. Harvey,Kenji Hagiya,Lawrence Grossman,Jeffrey N. Grossman,Giles A. Graham,Matthieu Gounelle,Philippe Gillet,Matthew J. Genge,George J. Flynn,T. Ferroir,Stewart Fallon,Denton S. Ebel,Zu Rong Dai,Patrick Cordier,Benton C. Clark,Miaofang Chi,Anna L. Butterworth,Donald E. Brownlee,John Bridges,Sean Brennan,Adrian J. Brearley,John P. Bradley,Pierre Bleuet,Phil Bland,Phil Bland,Ron K. Bastien +75 more
TL;DR: The bulk of the comet 81P/Wild 2 samples returned to Earth by the Stardust spacecraft appear to be weakly constructed mixtures of nanometer-scale grains, with occasional much larger ferromagnesian silicates, Fe-Ni sulfides,Fe-Ni metal, and accessory phases.