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  Probing sunspots with two-skip time–distance helioseismology

Duvall, T., Cally, P. S., Przybylski, D., Nagashima, K., & Gizon, L. (2018). Probing sunspots with two-skip time–distance helioseismology. Astronomy and Astrophysics, 613: A73. doi:10.1051/0004-6361/201732424.

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 Urheber:
Duvall, Thomas1, Autor           
Cally, Paul S., Autor
Przybylski, Damien1, Autor
Nagashima, Kaori1, Autor           
Gizon, Laurent1, Autor           
Affiliations:
1Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832287              

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Schlagwörter: Sun: helioseismology / sunspots
 Zusammenfassung: Context. Previous helioseismology of sunspots has been sensitive to both the structural and magnetic aspects of sunspot structure.

Aims. We aim to develop a technique that is insensitive to the magnetic component so the two aspects can be more readily separated.

Methods. We study waves reflected almost vertically from the underside of a sunspot. Time–distance helioseismology was used to measure travel times for the waves. Ray theory and a detailed sunspot model were used to calculate travel times for comparison.

Results. It is shown that these large distance waves are insensitive to the magnetic field in the sunspot. The largest travel time differences for any solar phenomena are observed.

Conclusions. With sufficient modeling effort, these should lead to better understanding of sunspot structure.

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Sprache(n): eng - English
 Datum: 2019-03-132018
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1051/0004-6361/201732424
 Art des Abschluß: -

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Titel: Astronomy and Astrophysics
  Andere : Astron. Astrophys.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Les Ulis Cedex A France : EDP Sciences
Seiten: - Band / Heft: 613 Artikelnummer: A73 Start- / Endseite: - Identifikator: Anderer: 1432-0746
ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1