Comparison of solar surface flows inferred from time-distance helioseismology and coherent structure tracking using HMI/SDO observations

Michal Švanda, Thierry Roudier, Michel Rieutord, Raymond Burston, Laurent Gizon

Research output: Contribution to journalArticle

Abstract

We compare measurements of horizontal flows on the surface of the Sun using helioseismic time-distance inversions and coherent structure tracking of solar granules. Tracking provides two-dimensional horizontal flows on the solar surface, whereas the time-distance inversions estimate the full three-dimensional velocity flows in the shallow near-surface layers. Both techniques use Helioseismic and Magnetic Imager observations as input. We find good correlations between the various measurements resulting from the two techniques. Further, we find a good agreement between these measurements and the time-averaged Doppler line-of-sight velocity, and also perform sanity checks on the vertical flow that resulted from the three-dimensional time-distance inversion.

Original languageEnglish (US)
Article number31
JournalAstrophysical Journal
Volume771
Issue number1
DOIs
StatePublished - Jul 1 2013

Fingerprint

helioseismology
inversions
flow velocity
line of sight
surface layer
surface layers
sun
comparison
estimates
inversion

Keywords

  • Sun: helioseismology
  • Sun: interior

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Comparison of solar surface flows inferred from time-distance helioseismology and coherent structure tracking using HMI/SDO observations. / Švanda, Michal; Roudier, Thierry; Rieutord, Michel; Burston, Raymond; Gizon, Laurent.

In: Astrophysical Journal, Vol. 771, No. 1, 31, 01.07.2013.

Research output: Contribution to journalArticle

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