Oscillations on the Sun in regions with a vertical magnetic field. I. Sunspot umbral oscillations

Details Oscillations on the Sun in regions with a vertical magnetic field. I. Sunspot umbral oscillations Oscillations on the Sun in regions with a vertical magnetic field. I. Sunspot umbral oscillations

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...386..653z&link_type=abstract

Astronomy and Astrophysics, v.386, p.653-657 (2002)

Astronomy and Astrophysics

Astrophysics

12

Sun: Sunspots, Sun: Oscillations, Magnetohydrodynamics (Mhd)

Scientific paper

We have calculated the spectrum of eigenmodes of umbral oscillations.
The eigenmodes of oscillations with periods from several tens of minutes
(g-modes) to several tens of seconds (p-modes) have been found. It is
shown that the 3-min umbral oscillations are p-modes modified by the
magnetic field.

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