The convection zone is a region of a star's interior where energy is transferred toward the surface by convection currents, rather than energetic photons. STAR is an acronym for: Organizations Society of Ticket Agents and Retailers], the self-regulatory body for the entertainment ticket industry in the UK. Society for Telescopy, Astronomy, and Radio, a non-profit New Jersey astronomy club. ... Convection is the transfer of heat by the motion of or within a fluid. ... In physics, the photon (from Greek φως, phÅs, meaning light) is the quantum of the electromagnetic field; for instance, light. ...
Solar-type stars
For the Sun, the convection zone is located in the outer (roughly) 30% of the interior. Once hot gas convects up to the photosphere, it emits photons into space, cools, and settles back into the star. This convective flow is the origin of stellar granules, and the departing energy is the visible light and other electromagnetic radiation that the star emits into space. (A good example of convection current is a lava lamp.) Sol redirects here. ... The photosphere of an astronomical object is the region at which the optical depth becomes one for a photon of wavelength equal to 5000 angstroms. ... In physics, the photon (from Greek φως, phÅs, meaning light) is the quantum of the electromagnetic field; for instance, light. ... STAR is an acronym for: Organizations Society of Ticket Agents and Retailers], the self-regulatory body for the entertainment ticket industry in the UK. Society for Telescopy, Astronomy, and Radio, a non-profit New Jersey astronomy club. ... Solar photosphere Granules on the photosphere of the Sun are caused by convection currents of plasma within the Suns convective zone. ... Electromagnetic waves can be imagined as a self-propagating transverse oscillating wave of electric and magnetic fields. ... Convection in the most general terms refers to the internal movement of currents within fluids (i. ... A lava lamp is a novelty item typically used for decoration rather than illumination. ...
Convective overshoot is the phenomenon of convection carrying material beyond an unstable region of the atmosphere into a stratified, stable region.
Another example of convective overshoot is at the base of the convectionzone in the solar interior.
The heat of the Sun's thermonuclear fusion is carried outward by radiation in the deep interior radiative zone and by convective circulation in the outer convectionzone, but cool sinking material from the surface penetrates farther into the radiative zone than naive theory would suggest.
Solar pressure waves are generated by the turbulence in the convectionzone, near the surface of the sun, and certain frequencies are amplified by constructive interference.
In the solar convectionzone, the temperature gradient is slightly greater than the adiabatic lapse rate, so that there is an anti-restoring force (that drives convection) and g-modes cannot propagate.
The g-modes are evanescent through the entire convectionzone, and are thought to have residual amplitudes of only millimeters at the photosphere.
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