Results 31 to 40 of about 229,895 (346)

Organics in comet 67P – a first comparative analysis of mass spectra from ROSINA–DFMS, COSAC and Ptolemy [PDF]

, 2017
The ESA Rosetta spacecraft followed comet 67P at a close distance for more than 2 yr. In addition, it deployed the lander Philae on to the surface of the comet.
A. Bieler, A. Morse, Balsiger, Biele, C.-Y. Tzou, Calmonte, Capaccioni, Cottin, F. Goesmann, Finzi, Fornasier, Fray, Goesmann, Goesmann, Graf, Grün, H. Balsiger, Huebner, Hässig, I. Wright, J. de Keyser, J.J. Berthelier, Kathrin Altwegg, Korth, Krüger, L. Le Roy, M. G. G. T Taylor, M. Rubin, M. Schuhmann, Meier, Mitchell, Morse, Morse, Nevejans, Quirico, Rubin, Rubin, S. Gasc, S.A. Fuselier, Stein, Stern, T. I. Gombosi, Thomas, U. Calmonte, Ulamec, Wright   +45 more
core   +4 more sources

The Dust Trail of Comet 67P/Churyumov-Gerasimenko

, 2007
We report the detection of comet 67P/Churyumov-Gerasimenko's dust trail and nucleus in 24 micron Spitzer Space Telescope images taken February 2004. The dust trail is not found in optical Palomar images taken June 2003.
A'Hearn, A'Hearn, A'Hearn, Agarwal, Agarwal, Brownlee, Burns, Colangeli, David J. Lien, Fernández, Fomenkova, Fukugita, Fulle, Fulle, Fulle, Fulle, Gehrz, Giorgini, Glassmeier, Green, Groussin, Groussin, Hanner, Harker, Harker, Harris, Hörz, Ishiguro, Ishiguro, Ishiguro, Jenniskens, Jenniskens, Keller, Kidger, Kimura, Kolokolova, Lamy, Lamy, Lamy, Lasue, Lebofsky, Levasseur-Regourd, Lisse, Lisse, Lisse, Lisse, Mathis, McDonnell, McDonnell, Meech, Michael S. Kelley, Neckel, Osip, Reach, Reach, Rieke, Schleicher, Smith, Spencer, Spitzer Science Center, Sykes, Sykes, Vaubaillon, Werner, William T. Reach   +64 more
core   +1 more source

X‐Ray Tomography Analysis of Damage Mechanisms in Metal Matrix Syntactic Foams During Compression

Advanced Engineering Materials, EarlyView.
In situ synchrotron X‐ray tomography is used to investigate the internal damage mechanisms of AlSi12 metal matrix syntactic foam with ceramic hollow spheres during compressive loading. It is concluded that a homogeneous distribution of the second‐phase filler material results in a sequential collapse in a localized region; this leads to controlled and ...
Indrajeet Tambe, János Endre Maróti, Imre Norbert Orbulov, Zoltan Hegedűs, Markus Ziehmer, Carl E. Krill III, Håkan Hallberg, Pär A. T. Olsson, Johan Hektor   +8 more
wiley   +1 more source

An InSAR‐GNSS Velocity Field for Iran

Geophysical Research Letters
We present average ground‐surface velocities and strain rates for the 1.7 million km2 area of Iran, from the joint inversion of InSAR‐derived displacements and GNSS data.
Andrew R. Watson, John R. Elliott, Milan Lazecký, Yasser Maghsoudi, Jack D. McGrath, Richard J. Walters   +5 more
doaj   +1 more source

Simultaneous Observation of Negatively and Positively Charged Nanograins at Comet 67P/Churyumov‐Gerasimenko

Geophysical Research Letters, 2020
Observations near comet 67P by Rosetta show evidence of charged nanograins. Specifically, the ion and electron sensor (IES) observed negative particles with energy/charge (E/q) consistent with charged nanograins.
K. LLera, J. L. Burch, R. Goldstein, Charlotte Goetz   +3 more
doaj   +1 more source

The Evolving Activity of the Dynamically Young Comet C/2009 P1 (Garradd)

, 2014
We used the UltraViolet-Optical Telescope on board Swift to observe the dynamically young comet C/2009 P1 (Garradd) from a heliocentric distance of 3.5 AU pre-perihelion until 4.0 AU outbound.
A'Hearn, M. F., Bodewits, D., Farnham, T. L., Feaga, L. M., McKay, A., Schleicher, D. G., Sunshine, J. M   +6 more
core   +1 more source

Recent Advancements in Bulk Processing of Rare‐Earth‐Free Hard Magnetic Materials and Related Multiscale Simulations

Advanced Engineering Materials, EarlyView.
This article provides an overview of recent advancements in bulk processing of rare‐earth‐free hard magnetic materials. It also addresses related simulation approaches at different scales. The research on rare‐earth‐free magnetic materials has increased significantly in recent years, driven by supply chain issues, environmental and social concerns, and
Daniel Scheiber, Andrea Bachmaier
wiley   +1 more source

Variability in interseismic strain accumulation rate and style along the Altyn Tagh Fault

Nature Communications
Major strike-slip faults that develop between strong and weaker regions are thought to focus along narrow shear zones at the rheological boundary. Here we present the InSAR-derived velocity field spanning almost the entire length of one such fault, the ...
Lin Shen, Andrew Hooper, John R. Elliott, Tim J. Wright   +3 more
doaj   +1 more source

High‐resolution digital elevation model from tri‐stereo Pleiades‐1 satellite imagery for lava flow volume estimates at Fogo Volcano

Geophysical Research Letters, 2016
Resolving changes in topography through time using accurate high‐resolution digital elevation models (DEMs) is key to understanding active volcanic processes.
Marco Bagnardi, Pablo J. González, Andrew Hooper   +2 more
doaj   +1 more source

Study of the April 20, 2007 CME-Comet Interaction Event with an MHD Model

, 2009
This study examines the tail disconnection event on April 20, 2007 on comet 2P/Encke, caused by a coronal mass ejection (CME) at a heliocentric distance of 0.34 AU.
A. Vourlidas, Buffington, C. T. Russell, Cohen, K. C. Hansen, L. K. Jian, Lisse, M. R. Combi, O. Cohen, Riley, Russell, T. I. Gombosi, Vourlidas, Vourlidas, W. B. Manchester, Y. D. Jia   +15 more
core   +1 more source