The Heliotail: Theory and Modeling
Abstract
Physical processes are discussed related to the heliotail which is formed when the solar wind interacts with the local interstellar medium. Although astrotails are commonly observed, the heliotail observations are only indirect. As a consequence, the direct comparison of the observed astrophysical objects and the Sun is impossible. This requires proper theoretical understanding of the heliotail formation and evolution, and numerical simulations in sufficiently large computational boxes. In this paper, we review some previous results related to the heliotail flow and show new simulations which demonstrate that the solar wind collimation inside the Parker spiral field lines diverted by the heliopause toward the heliotail is unrealistic. On the contrary, solar cycle effects ensure that the solar wind density reaches its largest values near the solar equatorial plane. We also argue that a realistic heliotail should be very long to account for the observed anisotropy of 1-10 TeV cosmic rays.
- Authors:
-
- Univ. of Alabama, Huntsville, AL (United States). Dept. of Space Science
- Publication Date:
- Research Org.:
- Univ. of Alabama, Huntsville, AL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1326082
- Grant/Contract Number:
- SC0008334; NNX14AJ53G; NNX14AF41G; NNX14AF43G; NNX15AN72G; NNX16AG83G; OCI-1144120; SMD-15-5860
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physics. Conference Series
- Additional Journal Information:
- Journal Volume: 719; Journal ID: ISSN 1742-6588
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Pogorelov, N. V. The Heliotail: Theory and Modeling. United States: N. p., 2016.
Web. doi:10.1088/1742-6596/719/1/012013.
Pogorelov, N. V. The Heliotail: Theory and Modeling. United States. https://doi.org/10.1088/1742-6596/719/1/012013
Pogorelov, N. V. Tue .
"The Heliotail: Theory and Modeling". United States. https://doi.org/10.1088/1742-6596/719/1/012013. https://www.osti.gov/servlets/purl/1326082.
@article{osti_1326082,
title = {The Heliotail: Theory and Modeling},
author = {Pogorelov, N. V.},
abstractNote = {Physical processes are discussed related to the heliotail which is formed when the solar wind interacts with the local interstellar medium. Although astrotails are commonly observed, the heliotail observations are only indirect. As a consequence, the direct comparison of the observed astrophysical objects and the Sun is impossible. This requires proper theoretical understanding of the heliotail formation and evolution, and numerical simulations in sufficiently large computational boxes. In this paper, we review some previous results related to the heliotail flow and show new simulations which demonstrate that the solar wind collimation inside the Parker spiral field lines diverted by the heliopause toward the heliotail is unrealistic. On the contrary, solar cycle effects ensure that the solar wind density reaches its largest values near the solar equatorial plane. We also argue that a realistic heliotail should be very long to account for the observed anisotropy of 1-10 TeV cosmic rays.},
doi = {10.1088/1742-6596/719/1/012013},
journal = {Journal of Physics. Conference Series},
number = ,
volume = 719,
place = {United States},
year = {Tue May 31 00:00:00 EDT 2016},
month = {Tue May 31 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
Heliosheath Processes and the Structure of the Heliopause: Modeling Energetic Particles, Cosmic Rays, and Magnetic Fields
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