DOT tomography of the solar atmosphere: IV. Magnetic patches in internetwork areas

A. G. De Wijn; R. J. Rutten; E. M.W.P. Haverkamp; P. Sütterlin

doi:10.1051/0004-6361:20053373

DOT tomography of the solar atmosphere: IV. Magnetic patches in internetwork areas

A. G. De Wijn, R. J. Rutten, E. M.W.P. Haverkamp, P. Sütterlin

Solar Frontiers

Research output: Contribution to journal › Review article › peer-review

67 Scopus citations

Abstract

We use G-band and Call II image sequences from the Dutch Open Telescope (DOT) to study magnetic elements that appear as bright points in internetwork parts of the quiet solar photosphere and chromosphere. We find that many of these bright points appear recurrently with varying intensity and horizontal motion within longer-lived magnetic patches. We develop an algorithm for detection of the patches and find that all patches identified last much longer than the granulation. The patches outline cell patterns on mesogranular scales, indicating that magnetic flux tubes are advected by granular flows to mesogranular boundaries. Statistical analysis of the emergence and disappearance of the patches points to an average patch lifetime as long as 530 ± 50 min (about nine hours), which suggests that the magnetic elements constituting strong internetwork fields are not generated by a local turbulent dynamo.

Original language	English
Pages (from-to)	1183-1190
Number of pages	8
Journal	Astronomy and Astrophysics
Volume	441
Issue number	3
DOIs	https://doi.org/10.1051/0004-6361:20053373
State	Published - Oct 2005

Keywords

Sun: chromosphere
Sun: granulation
Sun: magnetic fields
Sun: photosphere

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10.1051/0004-6361:20053373

Cite this

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title = "DOT tomography of the solar atmosphere: IV. Magnetic patches in internetwork areas",

abstract = "We use G-band and Call II image sequences from the Dutch Open Telescope (DOT) to study magnetic elements that appear as bright points in internetwork parts of the quiet solar photosphere and chromosphere. We find that many of these bright points appear recurrently with varying intensity and horizontal motion within longer-lived magnetic patches. We develop an algorithm for detection of the patches and find that all patches identified last much longer than the granulation. The patches outline cell patterns on mesogranular scales, indicating that magnetic flux tubes are advected by granular flows to mesogranular boundaries. Statistical analysis of the emergence and disappearance of the patches points to an average patch lifetime as long as 530 ± 50 min (about nine hours), which suggests that the magnetic elements constituting strong internetwork fields are not generated by a local turbulent dynamo.",

keywords = "Sun: chromosphere, Sun: granulation, Sun: magnetic fields, Sun: photosphere",

author = "\{De Wijn\}, \{A. G.\} and Rutten, \{R. J.\} and Haverkamp, \{E. M.W.P.\} and P. S{\"u}tterlin",

year = "2005",

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doi = "10.1051/0004-6361:20053373",

language = "English",

volume = "441",

pages = "1183--1190",

journal = "Astronomy and Astrophysics",

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TY - JOUR

T1 - DOT tomography of the solar atmosphere

T2 - IV. Magnetic patches in internetwork areas

AU - De Wijn, A. G.

AU - Rutten, R. J.

AU - Haverkamp, E. M.W.P.

AU - Sütterlin, P.

PY - 2005/10

Y1 - 2005/10

N2 - We use G-band and Call II image sequences from the Dutch Open Telescope (DOT) to study magnetic elements that appear as bright points in internetwork parts of the quiet solar photosphere and chromosphere. We find that many of these bright points appear recurrently with varying intensity and horizontal motion within longer-lived magnetic patches. We develop an algorithm for detection of the patches and find that all patches identified last much longer than the granulation. The patches outline cell patterns on mesogranular scales, indicating that magnetic flux tubes are advected by granular flows to mesogranular boundaries. Statistical analysis of the emergence and disappearance of the patches points to an average patch lifetime as long as 530 ± 50 min (about nine hours), which suggests that the magnetic elements constituting strong internetwork fields are not generated by a local turbulent dynamo.

AB - We use G-band and Call II image sequences from the Dutch Open Telescope (DOT) to study magnetic elements that appear as bright points in internetwork parts of the quiet solar photosphere and chromosphere. We find that many of these bright points appear recurrently with varying intensity and horizontal motion within longer-lived magnetic patches. We develop an algorithm for detection of the patches and find that all patches identified last much longer than the granulation. The patches outline cell patterns on mesogranular scales, indicating that magnetic flux tubes are advected by granular flows to mesogranular boundaries. Statistical analysis of the emergence and disappearance of the patches points to an average patch lifetime as long as 530 ± 50 min (about nine hours), which suggests that the magnetic elements constituting strong internetwork fields are not generated by a local turbulent dynamo.

KW - Sun: chromosphere

KW - Sun: granulation

KW - Sun: magnetic fields

KW - Sun: photosphere

UR - https://www.scopus.com/pages/publications/26844556564

U2 - 10.1051/0004-6361:20053373

DO - 10.1051/0004-6361:20053373

M3 - Review article

AN - SCOPUS:26844556564

SN - 0004-6361

VL - 441

SP - 1183

EP - 1190

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 3

ER -

DOT tomography of the solar atmosphere: IV. Magnetic patches in internetwork areas

Abstract

Keywords

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