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Lucy A. McFadden
Researcher at Goddard Space Flight Center
Publications - 186
Citations - 10412
Lucy A. McFadden is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Asteroid & Comet. The author has an hindex of 52, co-authored 186 publications receiving 9565 citations. Previous affiliations of Lucy A. McFadden include University of Maryland, College Park & Massachusetts Institute of Technology.
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Journal ArticleDOI
Deep Impact: Excavating Comet Tempel 1
Michael F. A'Hearn,M. J. S. Belton,W. A. Delamere,Jochen Kissel,Kenneth P. Klaasen,Lucy A. McFadden,Karen J. Meech,H. J. Melosh,Peter H. Schultz,Jessica M. Sunshine,Peter C. Thomas,J. Veverka,Donald K. Yeomans,M. W. Baca,I. Busko,C. J. Crockett,Steven M. Collins,Mark Desnoyer,C. A. Eberhardy,Carolyn M. Ernst,Tony L. Farnham,Lori M. Feaga,Olivier Groussin,Donald Hampton,Sergei I. Ipatov,Jian-Yang Li,Don J. Lindler,Carey M. Lisse,Carey M. Lisse,N. Mastrodemos,William M. Owen,James E. Richardson,James E. Richardson,Dennis D. Wellnitz,R. L. White +34 more
TL;DR: A large increase in organic material occurred during and after the event, with smaller changes in carbon dioxide relative to water, and a thermal map indicates a surface in equilibrium with sunlight.
Journal ArticleDOI
EPOXI at Comet Hartley 2
Michael F. A'Hearn,M. J. S. Belton,W. Alan Delamere,Lori M. Feaga,Donald Hampton,Jochen Kissel,Kenneth P. Klaasen,Lucy A. McFadden,Lucy A. McFadden,Karen J. Meech,H. Jay Melosh,H. Jay Melosh,Peter H. Schultz,Jessica M. Sunshine,Peter C. Thomas,Joseph Veverka,Dennis D. Wellnitz,Donald K. Yeomans,Sebastien Besse,Dennis Bodewits,Timothy J. Bowling,Brian Carcich,Steven M. Collins,Tony L. Farnham,Olivier Groussin,Brendan Hermalyn,Michael S. P. Kelley,Jian-Yang Li,Don J. Lindler,Carey M. Lisse,S. McLaughlin,Frederic Merlin,Frederic Merlin,Silvia Protopapa,James E. Richardson,J. L. Williams +35 more
TL;DR: In situ observations show that comet Hartley 2 is an unusually hyperactive comet, and this nucleus is outgassing primarily because of CO2, which drags chunks of ice out of the nucleus.
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Spitzer Spectral Observations of the Deep Impact Ejecta
Carey M. Lisse,Carey M. Lisse,J. VanCleve,A. C. Adams,Michael F. A'Hearn,Yanga R. Fernandez,Tony L. Farnham,Lee Armus,Carl J. Grillmair,J. Ingalls,M. J. S. Belton,Olivier Groussin,Lucy A. McFadden,Karen J. Meech,Peter H. Schultz,B. C. Clark,Lori M. Feaga,Jessica M. Sunshine +17 more
TL;DR: Spitzer Space Telescope imaging spectrometer observations of comet 9P/Tempel 1 during the Deep Impact encounter returned detailed, highly structured, 5- to 35-micrometer spectra of the ejecta, and the atomic abundance of the observed material is consistent with solar and C1 chondritic abundances.
Journal ArticleDOI
Differentiation of the asteroid Ceres as revealed by its shape
Peter C. Thomas,J. Wm. Parker,Lucy A. McFadden,Christopher T. Russell,S. A. Stern,Mark V. Sykes,Eliot F. Young +6 more
TL;DR: C Ceres has a shape and smoothness indicative of a gravitationally relaxed object that is significantly less flattened than that expected for a homogeneous object, but is consistent with a central mass concentration indicative of differentiation.
Journal ArticleDOI
Ammoniated phyllosilicates with a likely outer Solar System origin on (1) Ceres
M. C. De Sanctis,E. Ammannito,E. Ammannito,Andrea Raponi,Simone Marchi,Simone Marchi,T. B. McCord,Harry Y. McSween,Fabrizio Capaccioni,Maria Teresa Capria,Filippo Giacomo Carrozzo,Mauro Ciarniello,Andrea Longobardo,Federico Tosi,Sergio Fonte,Michelangelo Formisano,Alessandro Frigeri,Marco Giardino,Gianfranco Magni,Ernesto Palomba,Diego Turrini,Francesca Zambon,J. P. Combe,William C. Feldman,Ralf Jaumann,Lucy A. McFadden,Carle M. Pieters,Thomas H. Prettyman,Michael J. Toplis,Carol A. Raymond,Christopher T. Russell +30 more
TL;DR: Measurements of Ceres indicate widespread ammoniated phyllosilicates across the surface, but no detectable water ice, which suggests that material from the outer Solar System was incorporated into Ceres, either during its formation at great heliocentric distance or by incorporation of material transported into the main asteroid belt.