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Magnetosphere of HD 209458 b in the Paraboloid and MHD Models.

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Τίτλος: Magnetosphere of HD 209458 b in the Paraboloid and MHD Models.
Συγγραφείς: Krotov, A. S.1,2 (AUTHOR) a-krotov.2014@mail.ru, Belenkaya, E. S.1 (AUTHOR), Alexeev, I. I.1 (AUTHOR)
Πηγή: Astronomy Reports. Feb2026, Vol. 70 Issue 2, p232-237. 6p.
Θεματικοί όροι: *Magnetosphere, *Magnetohydrodynamics, *Stellar winds, *Hot Jupiters, *Paraboloid, *Plasma Alfven waves, *Magnetospheric physics
Περίληψη: The paper presents a comparative analysis of simulations of the magnetosphere of the hot Jupiter HD 209458 b performed with a paraboloid model and with ideal magnetohydrodynamic (MHD) modeling. Two flow regimes around the hot Jupiter—super-Alfvenic and sub-Alfvenic—are considered, since the exoplanet is located near the Alfvén radius. For the super-Alfvenic case, the paraboloid model reproduces a comet-like magnetosphere with closed field lines on the dayside and an elongated tail on the nightside, which is consistent with the results of the MHD modeling (a shock-type intrinsic magnetosphere according to the authors' classification). In the sub-Alfvenic regime, both models show the formation of pronounced Alfvén wings stretched along the star–planet line for the chosen orientation of the magnetic field of the stellar wind. The fundamental difference between the approaches is emphasized: the paraboloid model efficiently and compactly describes the geometry and topology of the magnetic field (convenient for operational analysis and interpretation of observations), whereas the MHD simulations allow one to account for the interaction of the plasma with the stellar wind and its magnetic field. [ABSTRACT FROM AUTHOR]
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  – Url: https://dx.doi.org/doi:10.1134/S1063772926700381
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  – Url: https://resolver.ebsco.com/c/fiv2js/result?sid=EBSCO:asx&genre=article&issn=10637729&ISBN=&volume=70&issue=2&date=20260201&spage=232&pages=232-237&title=Astronomy Reports&atitle=Magnetosphere%20of%20HD%C2%A0209458%C2%A0b%20in%20the%20Paraboloid%20and%20MHD%20Models.&aulast=Krotov%2C%20A.%20S.&id=DOI:10.1134/S1063772926700381
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Magnetosphere of HD 209458 b in the Paraboloid and MHD Models.
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  Data: <searchLink fieldCode="AR" term="%22Krotov%2C+A%2E+S%2E%22">Krotov, A. S.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> a-krotov.2014@mail.ru</i><br /><searchLink fieldCode="AR" term="%22Belenkaya%2C+E%2E+S%2E%22">Belenkaya, E. S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Alexeev%2C+I%2E+I%2E%22">Alexeev, I. I.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Astronomy+Reports%22">Astronomy Reports</searchLink>. Feb2026, Vol. 70 Issue 2, p232-237. 6p.
– Name: Subject
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  Data: *<searchLink fieldCode="DE" term="%22Magnetosphere%22">Magnetosphere</searchLink><br />*<searchLink fieldCode="DE" term="%22Magnetohydrodynamics%22">Magnetohydrodynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22Stellar+winds%22">Stellar winds</searchLink><br />*<searchLink fieldCode="DE" term="%22Hot+Jupiters%22">Hot Jupiters</searchLink><br />*<searchLink fieldCode="DE" term="%22Paraboloid%22">Paraboloid</searchLink><br />*<searchLink fieldCode="DE" term="%22Plasma+Alfven+waves%22">Plasma Alfven waves</searchLink><br />*<searchLink fieldCode="DE" term="%22Magnetospheric+physics%22">Magnetospheric physics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The paper presents a comparative analysis of simulations of the magnetosphere of the hot Jupiter HD 209458 b performed with a paraboloid model and with ideal magnetohydrodynamic (MHD) modeling. Two flow regimes around the hot Jupiter—super-Alfvenic and sub-Alfvenic—are considered, since the exoplanet is located near the Alfvén radius. For the super-Alfvenic case, the paraboloid model reproduces a comet-like magnetosphere with closed field lines on the dayside and an elongated tail on the nightside, which is consistent with the results of the MHD modeling (a shock-type intrinsic magnetosphere according to the authors' classification). In the sub-Alfvenic regime, both models show the formation of pronounced Alfvén wings stretched along the star–planet line for the chosen orientation of the magnetic field of the stellar wind. The fundamental difference between the approaches is emphasized: the paraboloid model efficiently and compactly describes the geometry and topology of the magnetic field (convenient for operational analysis and interpretation of observations), whereas the MHD simulations allow one to account for the interaction of the plasma with the stellar wind and its magnetic field. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1134/S1063772926700381
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 6
        StartPage: 232
    Subjects:
      – SubjectFull: Magnetosphere
        Type: general
      – SubjectFull: Magnetohydrodynamics
        Type: general
      – SubjectFull: Stellar winds
        Type: general
      – SubjectFull: Hot Jupiters
        Type: general
      – SubjectFull: Paraboloid
        Type: general
      – SubjectFull: Plasma Alfven waves
        Type: general
      – SubjectFull: Magnetospheric physics
        Type: general
    Titles:
      – TitleFull: Magnetosphere of HD 209458 b in the Paraboloid and MHD Models.
        Type: main
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            NameFull: Krotov, A. S.
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            NameFull: Belenkaya, E. S.
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            NameFull: Alexeev, I. I.
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            – D: 01
              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
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            – TitleFull: Astronomy Reports
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