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Time distance study of isolated sunspots
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AbstractWe present a comparative seismic study of conditions around and beneath isolated sunspots. Using the European Grid of Solar Observations' Solar Feature Catalogue of sunspots derived from SOHO/MDI continuum and magnetogram data, 1996–2005, we identify a set of isolated sunspots by checking that within a Carrington Rotation there were no other spots detected in the vicinity. We then use level‐2 tracked MDI Dopplergrams available from SOHO website to investigate wave‐speed perturbations of such sunspots using time‐distance helioseismology. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Title: Time distance study of isolated sunspots
Description:
AbstractWe present a comparative seismic study of conditions around and beneath isolated sunspots.
Using the European Grid of Solar Observations' Solar Feature Catalogue of sunspots derived from SOHO/MDI continuum and magnetogram data, 1996–2005, we identify a set of isolated sunspots by checking that within a Carrington Rotation there were no other spots detected in the vicinity.
We then use level‐2 tracked MDI Dopplergrams available from SOHO website to investigate wave‐speed perturbations of such sunspots using time‐distance helioseismology.
(© 2007 WILEY‐VCH Verlag GmbH & Co.
KGaA, Weinheim).
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