Helioseismology

Helioseismology is a scientific branch of solar astrophysics, and at the same time, an interdisciplinary area of research that analyzes the self-oscillation of the sun and it is gaining insights into their internal structure. The concept of helioseismology is both similar to Helio (Greek for sun) and seismology ( seismology ).

Franz -Ludwig Deubner noticed when observing the solar surface a rhythmic motion with a period of about five minutes, but he considered to be a tracking error of his telescope. The American physicist Robert B. Leighton observed the oscillation around the same time, recognized, however, that it was a five-minute oscillation of the solar surface. He published his findings in 1960. Leighton, thereby founding the Helioseismology as a new branch of astronomy.

The basic period of the natural oscillation of the sun is about five minutes. The period could be determined quite accurately by means of various erdbasierter observations and space probes as SOHO.

The analysis of the vibration data or observation allows accurate conclusions regarding various physical parameters of the sun, for example on the speed of propagation of sound in the interior of the sun. At the same time permits the analysis, to represent the distribution of temperature and magnetic field under the surface of the sun image.

According to recent findings, the self-oscillation is also responsible for the first time in 1877 discovered supersonic plasma jets on the Sun's surface. Normally, the sound waves are slowed down in the interior of the sun. Occasionally, however, these waves can reach the surface and provide for a matter ejection. The plasma is h up to 5000 km while thrown with a speed of up to 80,000 km / high.

Swell

Sun as a star

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