Cynthia Ng
Goddard Space Flight Center
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Publication
Featured researches published by Cynthia Ng.
Geophysical Research Letters | 1999
Donald V. Reames; Cynthia Ng; Allan J. Tylka
We examine the range of possible energy dependence of the ionization states of ions that are shock-accelerated from the ambient plasma of the solar corona. If acceleration begins in a region of moderate density, sufficiently low in the corona, ions above ∼0.1 MeV/amu approach an equilibrium charge state that depends primarily upon their speed and only weakly on the plasma temperature. We suggest that the large variations of the charge states with energy for ions such as Si and Fe observed in the 1997 November 6 event are consistent with stripping in moderately dense coronal plasma during shock acceleration. In the large solar-particle events studied previously, acceleration occurs sufficiently high in the corona that even Fe ions up to 600 MeV/amu are not stripped of electrons.
Advances in Space Research | 2009
Daniel Berdichevsky; Donald V. Reames; Chin-Chun Wu; Rainer Schwenn; R. P. Lepping; Robert J. MacDowall; C. J. Farrugia; J.-L. Bougeret; Cynthia Ng; A. J. Lazarus
Archive | 2010
Cynthia Ng; Donald V. Reames; Allan J. Tylka
Archive | 2010
Allan J. Tylka; Cynthia Ng; R. G. Marsden; C. Tranquille
Archive | 2008
Cynthia Ng; Donald V. Reames; Allan J. Tylka
Archive | 2008
Cynthia Ng; Donald V. Reames
Archive | 2006
Lauren Tan; Donald V. Reames; Cynthia Ng
Archive | 2006
Mihir I. Desai; C. M. S. Cohen; Christopher J. Smith; M. A. Lee; Yu. Eh. Litvinenko; Donald V. Reames; Cynthia Ng; Allan J. Tylka; Jozsef Kota; Joe Giacalone; J. R. Jokipii; Igor V. Sokolov; Tamas I. Gombosi; Ilia I. Roussev; Geoffrey Ye Li; G. P. Zank; Jeffrey A. Tessein
Archive | 2004
Daniel Berdichevsky; Donald V. Reames; C.-C. Wu; Rainer Schwenn; R. P. Lepping; Robert J. MacDowall; Charles J. Farrugia; J.-L. Bougeret; Cynthia Ng; Alan J. Lazarus
Archive | 2004
Cynthia Ng; Donald V. Reames