A new component of solar dynamics: North-south diverging flows migrating toward the equator with an 11 year period

J. G. Beck; L. Gizon; T. L. Duvall

doi:10.1086/342636

A new component of solar dynamics: North-south diverging flows migrating toward the equator with an 11 year period

J. G. Beck, L. Gizon, T. L. Duvall

Center for Space Science

Research output: Contribution to journal › Article › peer-review

Abstract

Time-distance helioseismology analysis of Dopplergrams provides maps of torsional oscillations and meridional flows. Meridional flow maps show a time-varying component that has a banded structure that matches the torsional oscillations with an equatorward migration over the solar cycle. The time-varying component of meridional flow consists of a flow diverging from the dominant latitude of magnetic activity. These maps are compared with other torsional oscillation maps and with magnetic flux maps, showing a strong correlation with active latitudes. These results demonstrate a strong link between the time-varying component of the meridional flow and the torsional oscillations.

Original language	English (US)
Pages (from-to)	L47-L50
Journal	Astrophysical Journal
Volume	575
Issue number	1 II
DOIs	https://doi.org/10.1086/342636
State	Published - Aug 10 2002

Keywords

Sun: atmospheric motions
Sun: rotation

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/342636

Cite this

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title = "A new component of solar dynamics: North-south diverging flows migrating toward the equator with an 11 year period",

abstract = "Time-distance helioseismology analysis of Dopplergrams provides maps of torsional oscillations and meridional flows. Meridional flow maps show a time-varying component that has a banded structure that matches the torsional oscillations with an equatorward migration over the solar cycle. The time-varying component of meridional flow consists of a flow diverging from the dominant latitude of magnetic activity. These maps are compared with other torsional oscillation maps and with magnetic flux maps, showing a strong correlation with active latitudes. These results demonstrate a strong link between the time-varying component of the meridional flow and the torsional oscillations.",

keywords = "Sun: atmospheric motions, Sun: rotation",

author = "Beck, {J. G.} and L. Gizon and Duvall, {T. L.}",

note = "Funding Information: We thank J. Schou, who kindly provided data for comparison, as well as R. K. Ulrich for useful discussions. We also thank P. Giles for his invaluable code. This work was supported by NASA grant NAG5-8878. SOHO is a project of international cooperation between ESA and NASA.",

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doi = "10.1086/342636",

language = "English (US)",

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T2 - North-south diverging flows migrating toward the equator with an 11 year period

AU - Beck, J. G.

AU - Gizon, L.

AU - Duvall, T. L.

N1 - Funding Information: We thank J. Schou, who kindly provided data for comparison, as well as R. K. Ulrich for useful discussions. We also thank P. Giles for his invaluable code. This work was supported by NASA grant NAG5-8878. SOHO is a project of international cooperation between ESA and NASA.

PY - 2002/8/10

Y1 - 2002/8/10

N2 - Time-distance helioseismology analysis of Dopplergrams provides maps of torsional oscillations and meridional flows. Meridional flow maps show a time-varying component that has a banded structure that matches the torsional oscillations with an equatorward migration over the solar cycle. The time-varying component of meridional flow consists of a flow diverging from the dominant latitude of magnetic activity. These maps are compared with other torsional oscillation maps and with magnetic flux maps, showing a strong correlation with active latitudes. These results demonstrate a strong link between the time-varying component of the meridional flow and the torsional oscillations.

AB - Time-distance helioseismology analysis of Dopplergrams provides maps of torsional oscillations and meridional flows. Meridional flow maps show a time-varying component that has a banded structure that matches the torsional oscillations with an equatorward migration over the solar cycle. The time-varying component of meridional flow consists of a flow diverging from the dominant latitude of magnetic activity. These maps are compared with other torsional oscillation maps and with magnetic flux maps, showing a strong correlation with active latitudes. These results demonstrate a strong link between the time-varying component of the meridional flow and the torsional oscillations.

KW - Sun: atmospheric motions

KW - Sun: rotation

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

A new component of solar dynamics: North-south diverging flows migrating toward the equator with an 11 year period

Abstract

Keywords

ASJC Scopus subject areas

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