Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-11-03
ApJ 726 (2011) L17
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
7 pages, 5 figures. Accepted for publication in ApJ Letters. Minor modifications in figures and texts
Scientific paper
10.1088/2041-8205/726/2/L17
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.
Kosovichev Alexander G.
Nagashima Kaori
Sekii Takashi
Zhao Junwei
No associations
LandOfFree
Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of Supergranulation Alignment in Polar Regions of the Sun by Helioseismology will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-145131