Seismology makes waves

Article Abstract:

A new method for analyzing the interior of the sun has been proposed. The procedure involves the analysis of acoustic rays describing the propagation of sound waves within the sun's interior. The procedure is analogous to the analysis of the travel time of waves set up by earthquakes or man-made explosions when obtaining a three-dimensional picture of the earth's interior. This new method of analysis includes modes over a range of penetraton depths, so that the separations and correlation times are not precise. However, the results are still representative of the local propagation properties of the sound waves.

Methods, Analysis, Sound-waves, Sound waves, Seismology

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A slowly rotating core

Article Abstract:

The internal rotation of the sun is slower than the surface rotation rate. The angular velocity of the sun's interior is calculated by the solar five-minute oscillations whose frequencies are affected by rotation. The rotation in some parts of the sun is determined by measuring the rotational splitting. The slow interior rotation may vary according to the solar cycle, or may result from magnetic field stresses.

Measurement, Astronomical rotation, Frequencies of oscillating systems, Oscillating frequencies

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Where are ProcyonEs quakes?

Article Abstract:

The starquakes are acoustic waves that penetrate the solar core ripples through the sun and should exist in other stars too. An observation of the star Procyon indicates that there is no evidence of star quakes.

United States, Science & research, Research, Astronomical research, Stars

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