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The directly visible outer layer or atmosphere of a star, especially of the sun.

pho′to·spher′ic (-sfîr′ĭk, -sfĕr′ĭk) adj.
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References in periodicals archive ?
Ultimately, the energy that heats the solar corona and accelerates the solar wind comes from the magnetic energy built up by the tangling photospheric motions.
3]), the thermal energy density of the corona (although it is 200-300 times hotter than the photosphere) is negligibly small compared with the photospheric energy density.
As a side note, we can calculate the photospheric temperature by solving Equation (4) for T,
Young also believed that the polarization was due to the scattering of photospheric light by small particles.
These spots are surrounded by bright plages, emission regions that coincide with (and closely resemble) the bright photospheric faculae usually seen foreshortened near the solar limb in white light.
His topics include radiative transfer in the sun's atmosphere, the dynamics of solar plasmas, observations of photospheric activity and magnetism, the solar wind and heliosphere, and influences of solar variability on Earth.
41,42) Figure 8 shows a correlation between V and B/f, where B is the photospheric magnetic field intensity.
The study of the photospheric stellar abundances of the planet-host stars is the key to understanding how protoplanets form, as well as which protoplanetary clouds evolve planets and which do not.
7 times brighter than the normal photospheric background at visible wavelengths and although the mean time for existence is 15 minutes, they can last for up to two hours.
Asplund's team published estimates of solar photospheric oxygen abundance that were 30 to 40 percent lower than commonly accepted values, with similar changes for carbon, nitrogen and neon.
In introducing 54 papers that presented a sample of its first results and related theoretical models at the 2007 ASP conference, Matthews (UCL Mullard Space Science Laboratory, Surrey, UK) and coauthors from NASA and the National Astronomical Observatory of Japan explain Hinode's mission to provide information on how solar magnetic fields are formed, evolve, and interact with plasmas to create the photospheric and chromospheric phenomena observed.
The photospheric situation connected with the development of flares accompanied the type IV radio burst.