Solar-like oscillations
Encyclopedia
The term solar-like oscillations refers to oscillation
s in other star
s that are excited in the same way as those in the Sun
, namely by convection
in its outer layers.
Oscillation
Oscillation is the repetitive variation, typically in time, of some measure about a central value or between two or more different states. Familiar examples include a swinging pendulum and AC power. The term vibration is sometimes used more narrowly to mean a mechanical oscillation but sometimes...
s in other star
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...
s that are excited in the same way as those in the Sun
Sun
The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields...
, namely by convection
Convection
Convection is the movement of molecules within fluids and rheids. It cannot take place in solids, since neither bulk current flows nor significant diffusion can take place in solids....
in its outer layers.
See also
- asteroseismologyAsteroseismologyAsteroseismology also known as stellar seismology is the science that studies the internal structure of pulsating stars by the interpretation of their frequency spectra. Different oscillation modes penetrate to different depths inside the star...
- helioseismologyHelioseismologyHelioseismology is the study of the propagation of wave oscillations, particularly acoustic pressure waves, in the Sun. Unlike seismic waves on Earth, solar waves have practically no shear component . Solar pressure waves are believed to be generated by the turbulence in the convection zone near...
- variable stars
- Procyon
- Space missions: COROTCorotCorot may refer to:* Jean-Baptiste-Camille Corot, French landscape painter * COROT, a space mission with the dual aims of finding extrasolar planets and performing asteroseismology* COROT-7, a dwarf star in the Monoceros constellation...
, KeplerKepler MissionThe Kepler spacecraft is an American space observatory, the space-based portion of NASA's Kepler Mission to discover Earth-like planets orbiting other stars. The spacecraft is named in honor of the 17th-century German astronomer Johannes Kepler...
, MOSTMicrovariability and Oscillations of STars telescopeThe Microvariability and Oscillations of STars telescope, better known simply as MOST, is Canada's first and only space telescope. It is also the smallest space telescope in the world...
, WIREWide Field Infrared ExplorerThe Wide Field Infrared Explorer was a satellite launched on 5 March 1999 on the Pegasus XL rocket into a polar orbit between 409 km and 426 km above the Earth's surface...
External links
- Lecture Notes on Stellar Oscillations published by J. Christensen-DalsgaardJørgen Christensen-DalsgaardJørgen Christensen-Dalsgaard is a Danish astronomer at Aarhus University in Denmark. He specializes in asteroseismology and helioseismology to which he has made significant contributions including predicting the oscillation of Sun-like stars in 1983...
(Aarhus University, Denmark)