Statistical Study of Magnetic Overshoots at Collisionless Shocks.
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| Title: | Statistical Study of Magnetic Overshoots at Collisionless Shocks. |
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| Authors: | Lindberg, M.1 (AUTHOR) m.lindberg@qmul.ac.uk, Hietala, H.1 (AUTHOR), Shirazul, K.1 (AUTHOR), Trotta, D.2 (AUTHOR), Sulaiman, A. H.3 (AUTHOR), Burkholder, B. L.4,5 (AUTHOR), Dimmock, A.6 (AUTHOR) |
| Source: | Journal of Geophysical Research. Space Physics. May2025, Vol. 130 Issue 5, p1-16. 16p. |
| Subject Terms: | Mach number, Magnetic measurements, Hybrid computer simulation, Saturn (Planet), Magnetic fields |
| Abstract: | We use data from the Magnetospheric Multiscale, Solar Orbiter, and Cassini spacecraft to statistically study magnetic overshoots at Earth's bow shock, interplanetary shocks, and Saturn's bow shock. The size of the magnetic overshoot exhibits a clear positive correlation with the Alfvénic Mach number and its dependence on the upstream plasma beta is investigated. We present updated empirical relationships from which the Alfvénic Mach number can be estimated using only magnetic field data via measurement of the magnetic overshoot. The magnetic overshoot and Alfvén Mach numbers are compared with a 2D hybrid simulation and previous observations at Saturn's bow shock. The comparison with Saturn displays a slight offset between the data sets. The reason for this offset is discussed and might arise from the different methods of obtaining the Mach numbers. Finally, we explore the possibility of estimating the cross‐shock potential with a theoretical expression using each shock's calculated magnetic overshoot, Mach number, and plasma beta. Key Points: Differences in the observed magnetic overshoots at interplanetary shocks, Earth's, and Saturn's bow shocks are studied and explainedEmpirical relationships between the magnetic overshoot and Alfvénic Mach number are determinedThe overshoot variability along the shock surface in a 2D hybrid simulation is compared with the observations [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | GreenFILE |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 185452464 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Statistical Study of Magnetic Overshoots at Collisionless Shocks. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lindberg%2C+M%2E%22">Lindberg, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> m.lindberg@qmul.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Hietala%2C+H%2E%22">Hietala, H.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shirazul%2C+K%2E%22">Shirazul, K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Trotta%2C+D%2E%22">Trotta, D.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sulaiman%2C+A%2E+H%2E%22">Sulaiman, A. H.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Burkholder%2C+B%2E+L%2E%22">Burkholder, B. L.</searchLink><relatesTo>4,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dimmock%2C+A%2E%22">Dimmock, A.</searchLink><relatesTo>6</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Space+Physics%22">Journal of Geophysical Research. Space Physics</searchLink>. May2025, Vol. 130 Issue 5, p1-16. 16p. – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Mach+number%22">Mach number</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+measurements%22">Magnetic measurements</searchLink><br /><searchLink fieldCode="DE" term="%22Hybrid+computer+simulation%22">Hybrid computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Saturn+%28Planet%29%22">Saturn (Planet)</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We use data from the Magnetospheric Multiscale, Solar Orbiter, and Cassini spacecraft to statistically study magnetic overshoots at Earth's bow shock, interplanetary shocks, and Saturn's bow shock. The size of the magnetic overshoot exhibits a clear positive correlation with the Alfvénic Mach number and its dependence on the upstream plasma beta is investigated. We present updated empirical relationships from which the Alfvénic Mach number can be estimated using only magnetic field data via measurement of the magnetic overshoot. The magnetic overshoot and Alfvén Mach numbers are compared with a 2D hybrid simulation and previous observations at Saturn's bow shock. The comparison with Saturn displays a slight offset between the data sets. The reason for this offset is discussed and might arise from the different methods of obtaining the Mach numbers. Finally, we explore the possibility of estimating the cross‐shock potential with a theoretical expression using each shock's calculated magnetic overshoot, Mach number, and plasma beta. Key Points: Differences in the observed magnetic overshoots at interplanetary shocks, Earth's, and Saturn's bow shocks are studied and explainedEmpirical relationships between the magnetic overshoot and Alfvénic Mach number are determinedThe overshoot variability along the shock surface in a 2D hybrid simulation is compared with the observations [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1029/2024JA033659 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: 1 Subjects: – SubjectFull: Mach number Type: general – SubjectFull: Magnetic measurements Type: general – SubjectFull: Hybrid computer simulation Type: general – SubjectFull: Saturn (Planet) Type: general – SubjectFull: Magnetic fields Type: general Titles: – TitleFull: Statistical Study of Magnetic Overshoots at Collisionless Shocks. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lindberg, M. – PersonEntity: Name: NameFull: Hietala, H. – PersonEntity: Name: NameFull: Shirazul, K. – PersonEntity: Name: NameFull: Trotta, D. – PersonEntity: Name: NameFull: Sulaiman, A. H. – PersonEntity: Name: NameFull: Burkholder, B. L. – PersonEntity: Name: NameFull: Dimmock, A. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 21699380 Numbering: – Type: volume Value: 130 – Type: issue Value: 5 Titles: – TitleFull: Journal of Geophysical Research. Space Physics Type: main |
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