Validating time-distance far-side imaging of solar active regions through numerical simulations

Thomas Hartlep, Junwei Zhao, Nagi N. Mansour, Alexander G. Kosovichev

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


Far-side imaging using time-distance helioseismology methods is assessed using numerically generated artificial data. The data are generated using direct numerical simulations of acoustic oscillations in a spherical solar model. Localized variations of the sound speed in the surface and subsurface layers are used to model the perturbations associated with sunspots and active regions. The accuracy of acoustic travel-time far-side maps is shown to depend on the size and location of active regions. Potential artifacts in the far-side imaging procedure, such as those caused by the presence of active regions on the solar near side, are also investigated.

Original languageEnglish (US)
Pages (from-to)1373-1378
Number of pages6
JournalAstrophysical Journal
Issue number2
StatePublished - Dec 20 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Methods: numerical
  • Sun: helioseismology
  • Sun: oscillations
  • Sunspots


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