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 journalArticlepeer-review

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

Keywords

  • Sun: helioseismology
  • Sun: interior

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Comparison of solar surface flows inferred from time-distance helioseismology and coherent structure tracking using HMI/SDO observations'. Together they form a unique fingerprint.

Cite this