G
Graciela Matrajt
Researcher at University of Washington
Publications - 60
Citations - 4634
Graciela Matrajt is an academic researcher from University of Washington. The author has contributed to research in topics: Comet & Chondrite. The author has an hindex of 28, co-authored 60 publications receiving 4359 citations. Previous affiliations of Graciela Matrajt include University of Paris & University of Paris-Sud.
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Journal ArticleDOI
Oxygen isotopes in crystalline silicates of comet Wild 2: A comparison of oxygen isotope systematics between Wild 2 particles and chondritic materials
Daisuke Nakashima,Takayuki Ushikubo,David J. Joswiak,Donald E. Brownlee,Graciela Matrajt,Michael K. Weisberg,Michael K. Weisberg,Michael E. Zolensky,Noriko T. Kita +8 more
TL;DR: Oxygen three-isotope ratios of nine crystalline silicate particles from comet Wild 2 were measured to investigate oxygen isotope systematics of cometary materials as discussed by the authors.
Journal ArticleDOI
Kosmochloric Ca-rich pyroxenes and FeO-rich olivines (Kool grains) and associated phases in Stardust tracks and chondritic porous interplanetary dust particles: Possible precursors to FeO-rich type II chondrules in ordinary chondrites
David J. Joswiak,Donald E. Brownlee,Graciela Matrajt,Andrew J. Westphal,Christopher J. Snead +4 more
TL;DR: In this paper, terminal particles and mineral fragments from comet 81P/Wild 2 were studied in 16 aerogel tracks by transmission and secondary electron microscopy, and they were associated with FeO-rich olivine ± Cr-rich spinel ± aluminosilicate glass or albitic feldspar.
Organics Captured from Comet Wild 2 by the Stardust Spacecraft
S. A. Stanford,Jérôme Aléon,C. M. O'd. Alexander,Tohru Araki,Saša Bajt,G. A. Baratta,Janet Borg,John Robert Brucato,Mark J. Burchell,Henner Busemann,Anna L. Butterworth,Simon J. Clemett,George D. Cody,Luigi Colangeli,George Cooper,Louis Le Sergeant d'Hendecourt,Zahia Djouadi,Jason P. Dworkin,G. Ferrini,Holger Fleckenstein,George J. Flynn,Ian A. Franchi,Marc Fries,Mary K. Gilles,Daniel P. Glavin,M. Gounelle,F. Grossemy,Chris Jacobsen,Lindsay P. Keller,A. D. Kilcoyne,Jan Leitner,Graciela Matrajt,Anders Meibom,Mennella,Smail Mostefaoui,Larry R. Nittler,Maria Elisabetta Palumbo,François Robert,Alessandra Rotundi,Christopher J. Snead,Maegan K. Spencer,Andrew Steele,Thomas Stephan,Tolek Tyliszczak,Andrew J. Westphal,S. Wirick,Brigitte Wopenka,H. Yabuta,Richard N. Zare,Michael E. Zolensky +49 more
TL;DR: In the Comet Wild 2 samples, organic compounds were found to be rich in O and N compared to meteoritic organics as discussed by the authors, suggesting that some organic compounds have an interstellar/protostellar heritage.
Journal ArticleDOI
The origin of refractory minerals in comet 81P/Wild 2
Miaofang Chi,Miaofang Chi,Hope A. Ishii,Steven B. Simon,John P. Bradley,Zu Rong Dai,D. Joswiak,Nigel D. Browning,Graciela Matrajt +8 more
TL;DR: In this paper, the authors examined the refractory Ti-bearing minerals in the calcium-, aluminum-rich inclusion (CAI) Inti, recovered from the comet 81P/Wild 2 sample, using analytical (scanning) transmission electron microscopy (STEM) methods including imaging, nanodiffraction, energy-dispersive spectroscopy (EDX) and electron energy loss spectrograms.
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A nuclear microprobe study of the distribution and concentration of carbon and nitrogen in Murchison and Tagish Lake meteorites, Antarctic micrometeorites, and IDPs: Implications for astrobiology
TL;DR: The authors measured the carbon and nitrogen concentrations and distributions in interplanetary dust particles (IDPs) and Antarctic micrometeorites (MMs), and compared them to two carbonaceous chondrites: Tagish Lake and Murchison.