Combined first and second order Fermi acceleration at comets
dc.contributor.author | Gombosi, Tamas I. | en_US |
dc.contributor.author | Lorencz, K. | en_US |
dc.contributor.author | Jokipii, J. R. | en_US |
dc.date.accessioned | 2006-04-07T20:58:26Z | |
dc.date.available | 2006-04-07T20:58:26Z | |
dc.date.issued | 1989 | en_US |
dc.identifier.citation | Gombosi, T. I., Lorencz, K., Jokipii, J. R. (1989)."Combined first and second order Fermi acceleration at comets." Advances in Space Research 9(3): 337-341. <http://hdl.handle.net/2027.42/28182> | en_US |
dc.identifier.uri | http://www.sciencedirect.com/science/article/B6V3S-472BKF3-NP/2/749e37e44a101c514eb74196d1ec4d72 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/28182 | |
dc.description.abstract | Our two-dimensional, time-dependent model calculations indicate that an interplay between velocity and spatial diffusion may be responsible for the acceleration of implanted heavy ions in the cometary preshock region. Velocity diffusion (second order Fermi acceleration) accelerates the pickup ions to moderate energies thus creating a seed population for the more efficient diffusive-compressive shock acceleration. Solar wind convection limits the time available for diffusive-compressive acceleration, therefore the resulting energy spectrum above 100 keV is a power law with a spectral index of 5 - 6, a value which is in reasonably good agreement with observations. | en_US |
dc.format.extent | 515852 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Elsevier | en_US |
dc.title | Combined first and second order Fermi acceleration at comets | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Atmospheric, Oceanic and Space Sciences | en_US |
dc.subject.hlbsecondlevel | Aerospace Engineering | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Space Physics Research Laboratory, Department of Atmospheric, Oceanic and Space Sciences, The University of Michigan, Ann Arbor, Michigan 48109, U.S.A.; Space Physics Research Laboratory, Department of Atmospheric, Oceanic and Space Sciences, the University of Michigan, Ann Arbor, Michigan 48109, U.S.A. | en_US |
dc.contributor.affiliationother | Central Research Institute for Physics, Hungarian Academy of Sciences, Budapest, P.O. Box 49, Hungary 1525 | en_US |
dc.contributor.affiliationother | Departments of Astronomy and Planetary Sciences, The University of Arizona, Tucson, Arizona 85721, U.S.A. | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/28182/1/0000634.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/0273-1177(89)90285-8 | en_US |
dc.identifier.source | Advances in Space Research | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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