dc.contributor.author | Luo, Xi | |
dc.contributor.author | Potgieter, Marius | |
dc.contributor.author | Zhang, Ming | |
dc.contributor.author | Feng, Xueshang | |
dc.contributor.author | Pogorelov, N.V. | |
dc.date.accessioned | 2016-08-30T07:08:21Z | |
dc.date.available | 2016-08-30T07:08:21Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Luo, X. et al. 2015. A numerical simulation of cosmic-ray modulation near the heliopause. Astrophysical journal, 808(1): Article no 82. [https://doi.org/10.1088/0004-637X/808/1/82] | en_US |
dc.identifier.issn | 0004-637X | |
dc.identifier.issn | 1538-4357 (Online) | |
dc.identifier.uri | http://hdl.handle.net/10394/18438 | |
dc.identifier.uri | https://doi.org/10.1088/0004-637X/808/1/82 | |
dc.identifier.uri | http://iopscience.iop.org/article/10.1088/0004-637X/808/1/82 | |
dc.description.abstract | Based on a hybrid galactic cosmic-ray transport model, which incorporated MHD global heliospheric data into
Parker’s cosmic-ray transport equation, we studied the behavior of the transport of galactic cosmic rays and the
corresponding gradients in their flux near the heliopause (HP). We found that, (1) by increasing the ratio of the
parallel diffusion coefficient to the perpendicular diffusion coefficient in the interstellar magnetic field of the outer
heliosheath, the simulated radial flux near the HP increases as well. As the ratio multiplying factor reached 1010,
the radial flux experienced a sudden jump near the HP, similar to what Voyager 1 observed in 2012. (2) The effect
of changing the diffusion coefficients’ ratio on the radial flux variation depends on the energy of the cosmic rays,
the lower the energy, the more pronounced the effect is. (3) The magnitude of the diffusion coefficients also affect
the radial flux near the HP, the modulation beyond the HP varies by adjusting the magnitude multiplying factor | en_US |
dc.language.iso | en | en_US |
dc.publisher | IOP Publishing | en_US |
dc.subject | Sun: heliosphere | en_US |
dc.subject | cosmic rays | en_US |
dc.subject | magnetohydrodynamics (MHD) | en_US |
dc.title | A numerical simulation of cosmic-ray modulation near the heliopause | en_US |
dc.type | Article | en_US |
dc.contributor.researchID | 26557274 - Luo, Xi | |
dc.contributor.researchID | 10060014 - Potgieter, Marthinus Steenkamp | |