Subsurface Flows in Solar Active Regions and Polar Areas from Hinode Observations

Details Subsurface Flows in Solar Active Regions and Polar Areas from Hinode Observations Subsurface Flows in Solar Active Regions and Polar Areas from Hinode Observations

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0706z&link_type=abstract

American Astronomical Society, SPD meeting #40, #7.06; Bulletin of the American Astronomical Society, Vol. 41, p.813

Astronomy and Astrophysics

Astronomy

Scientific paper

High-resolution observations of Ca II H line intensity made by Hinode have provided us an opportunity to study subsurface flow fields of solar active regions with an unprecedented high spatial resolution, and a possibility to study subsurface meridional flows in the solar polar areas. For a large active region, we have found a strong downdraft below the sunspot, a mass circulation around the spot, and an evidence of magnetoconvection beneath the strong field area. For the polar regions, we have been able to derive a poleward meridional flow of an order of 5 m/s for the first time using the time-distance helioseismology technique.

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