Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology
We report on a new phenomenon of `alignment' of supergranulation cells in the polar regions of the Sun. Recent high-resolution datasets obtained by the Solar Optical Telescope onboard the Hinode satellite enabled us to investigate supergranular structures in high-latitude regions of the Sun. We...
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ftdatacite:10.48550/arxiv.1011.1025 2023-05-15T18:22:32+02:00 Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology Nagashima, Kaori Zhao, Junwei Kosovichev, Alexander G. Sekii, Takashi 2010 https://dx.doi.org/10.48550/arxiv.1011.1025 https://arxiv.org/abs/1011.1025 unknown arXiv https://dx.doi.org/10.1088/2041-8205/726/2/l17 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences article-journal Article ScholarlyArticle Text 2010 ftdatacite https://doi.org/10.48550/arxiv.1011.1025 https://doi.org/10.1088/2041-8205/726/2/l17 2022-04-01T14:29:17Z We report on a new phenomenon of `alignment' of supergranulation cells in the polar regions of the Sun. Recent high-resolution datasets obtained by the Solar Optical Telescope onboard the Hinode satellite enabled us to investigate supergranular structures in high-latitude regions of the Sun. We have carried out a local helioseismology time-distance analysis of the data, and detected acoustic travel-time variations due to the supergranular flows. The supergranulation cells in both the north and south polar regions show systematic alignment patterns in the north-south direction. The south-pole datasets obtained in a month-long Hinode campaign indicate that the supergranulation alignment property may be quite common in the polar regions. We also discuss the latitudinal dependence of the supergranulation cell sizes; the data show that the east-west cell size decreases towards higher latitudes. : 7 pages, 5 figures. Accepted for publication in ApJ Letters. Minor modifications in figures and texts Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences |
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Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences Nagashima, Kaori Zhao, Junwei Kosovichev, Alexander G. Sekii, Takashi Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology |
topic_facet |
Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences |
description |
We report on a new phenomenon of `alignment' of supergranulation cells in the polar regions of the Sun. Recent high-resolution datasets obtained by the Solar Optical Telescope onboard the Hinode satellite enabled us to investigate supergranular structures in high-latitude regions of the Sun. We have carried out a local helioseismology time-distance analysis of the data, and detected acoustic travel-time variations due to the supergranular flows. The supergranulation cells in both the north and south polar regions show systematic alignment patterns in the north-south direction. The south-pole datasets obtained in a month-long Hinode campaign indicate that the supergranulation alignment property may be quite common in the polar regions. We also discuss the latitudinal dependence of the supergranulation cell sizes; the data show that the east-west cell size decreases towards higher latitudes. : 7 pages, 5 figures. Accepted for publication in ApJ Letters. Minor modifications in figures and texts |
format |
Text |
author |
Nagashima, Kaori Zhao, Junwei Kosovichev, Alexander G. Sekii, Takashi |
author_facet |
Nagashima, Kaori Zhao, Junwei Kosovichev, Alexander G. Sekii, Takashi |
author_sort |
Nagashima, Kaori |
title |
Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology |
title_short |
Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology |
title_full |
Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology |
title_fullStr |
Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology |
title_full_unstemmed |
Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology |
title_sort |
detection of supergranulation alignment in polar regions of the sun by helioseismology |
publisher |
arXiv |
publishDate |
2010 |
url |
https://dx.doi.org/10.48550/arxiv.1011.1025 https://arxiv.org/abs/1011.1025 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1088/2041-8205/726/2/l17 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1011.1025 https://doi.org/10.1088/2041-8205/726/2/l17 |
_version_ |
1766201939024936960 |