Sliding Contacts in Planetary Magnetospheres
In the planetary magnetospheres there are specific places connected with velocity breakdown, reconnection, and dynamo processes. Here we pay attention to sliding layers. Sliding layers are formed in the ionosphere, on separatrix surfaces, at the magnetopauses and boundaries of stellar astrospheres,...
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Format: | Article |
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MDPI AG
2021-02-01
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Series: | Symmetry |
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Online Access: | https://www.mdpi.com/2073-8994/13/2/283 |
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author | Elena Belenkaya Igor Alexeev |
author_facet | Elena Belenkaya Igor Alexeev |
author_sort | Elena Belenkaya |
collection | DOAJ |
description | In the planetary magnetospheres there are specific places connected with velocity breakdown, reconnection, and dynamo processes. Here we pay attention to sliding layers. Sliding layers are formed in the ionosphere, on separatrix surfaces, at the magnetopauses and boundaries of stellar astrospheres, and at the Alfvén radius in the equatorial magnetosphere of rapidly rotating strongly magnetized giant planets. Although sliding contacts usually occur in thin local layers, their influence on the global structure of the surrounding space is very great. Therefore, they are associated with non-local processes that play a key role on a large scale. There can be an exchange between different forms of energy, a generation of strong field-aligned currents and emissions, and an amplification of magnetic fields. Depending on the conditions in the magnetosphere of the planet/exoplanet and in the flow of magnetized plasma passing it, different numbers of sliding layers with different configurations appear. Some are associated with regions of auroras and possible radio emissions. The search for planetary radio emissions is a current task in the detection of exoplanets. |
first_indexed | 2024-03-09T05:15:39Z |
format | Article |
id | doaj.art-12134a5215704316878c2d52a055b265 |
institution | Directory Open Access Journal |
issn | 2073-8994 |
language | English |
last_indexed | 2024-03-09T05:15:39Z |
publishDate | 2021-02-01 |
publisher | MDPI AG |
record_format | Article |
series | Symmetry |
spelling | doaj.art-12134a5215704316878c2d52a055b2652023-12-03T12:45:05ZengMDPI AGSymmetry2073-89942021-02-0113228310.3390/sym13020283Sliding Contacts in Planetary MagnetospheresElena Belenkaya0Igor Alexeev1Skobeltsyn Institute of Nuclear Physics (SINP MSU), Lomonosov Moscow State University, 119991 Moscow, RussiaSkobeltsyn Institute of Nuclear Physics (SINP MSU), Lomonosov Moscow State University, 119991 Moscow, RussiaIn the planetary magnetospheres there are specific places connected with velocity breakdown, reconnection, and dynamo processes. Here we pay attention to sliding layers. Sliding layers are formed in the ionosphere, on separatrix surfaces, at the magnetopauses and boundaries of stellar astrospheres, and at the Alfvén radius in the equatorial magnetosphere of rapidly rotating strongly magnetized giant planets. Although sliding contacts usually occur in thin local layers, their influence on the global structure of the surrounding space is very great. Therefore, they are associated with non-local processes that play a key role on a large scale. There can be an exchange between different forms of energy, a generation of strong field-aligned currents and emissions, and an amplification of magnetic fields. Depending on the conditions in the magnetosphere of the planet/exoplanet and in the flow of magnetized plasma passing it, different numbers of sliding layers with different configurations appear. Some are associated with regions of auroras and possible radio emissions. The search for planetary radio emissions is a current task in the detection of exoplanets.https://www.mdpi.com/2073-8994/13/2/283sliding contactsmagnetosphereplanetsexoplanetsreconnectiondynamo |
spellingShingle | Elena Belenkaya Igor Alexeev Sliding Contacts in Planetary Magnetospheres Symmetry sliding contacts magnetosphere planets exoplanets reconnection dynamo |
title | Sliding Contacts in Planetary Magnetospheres |
title_full | Sliding Contacts in Planetary Magnetospheres |
title_fullStr | Sliding Contacts in Planetary Magnetospheres |
title_full_unstemmed | Sliding Contacts in Planetary Magnetospheres |
title_short | Sliding Contacts in Planetary Magnetospheres |
title_sort | sliding contacts in planetary magnetospheres |
topic | sliding contacts magnetosphere planets exoplanets reconnection dynamo |
url | https://www.mdpi.com/2073-8994/13/2/283 |
work_keys_str_mv | AT elenabelenkaya slidingcontactsinplanetarymagnetospheres AT igoralexeev slidingcontactsinplanetarymagnetospheres |