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Sudden intensity increases and radial gradient changes of cosmic ray mev electrons and protons observed at voyager 1 beyond 111 au in the heliosheath
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | McDonald, F. B. Stone, E. C. Lal, N. Cummings, A. C. Webber, W. R. Heikkila, B. |
| Copyright Year | 2012 |
| Description | Voyager 1 has entered regions of different propagation conditions for energetic cosmic rays in the outer heliosheathat a distance of about 111 AU from the Sun. The low energy 614 MeV galactic electron intensity increased by 20over a time period 10 days and the electron radial intensity gradient abruptly decreased from 19AU to 8AU at2009.7 at a radial distance of 111.2 AU. At about 2011.2 at a distance of 116.6 AU a second abrupt intensity increase of25 was observed for electrons. After the second sudden electron increase the radial intensity gradient increased to18AU. This large positive gradient and the 13 day periodic variations of 200 MeV particles observed near theend of 2011 indicate that V1 is still within the overall heliospheric modulating region. The implications of these resultsregarding the proximity of the heliopause are discussed. |
| File Size | 1385507 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140005825 |
| Archival Resource Key | ark:/13960/t5m956w78 |
| Language | English |
| Publisher Date | 2012-03-29 |
| Access Restriction | Open |
| Subject Keyword | Protons Cosmic Rays Heliosheath Heliosphere Voyager 1 Spacecraft Electron Flux Density Annual Variations Spectral Energy Distribution Periodic Variations Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
