The system has been classified as a RS Canum Venaticorum variable, a class of binary stars with active chromospheres that cause large starspots.
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The effective temperature of its chromosphere is 5, 200 K, giving it the characteristic yellow hue of a G-type star.
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It is designed to investigate the fast dynamics of the solar photosphere and chromosphere performing visible and NIR broad-band and monochromatic observations.
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The sun's surface, or atmosphere, is divided into three regions : the photosphere, the chromosphere, and the solar corona.
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Beyond the chromosphere of Aldebaran is an extended molecular outer atmosphere ( MOLsphere ) where the temperature is cool enough for molecules of gas to form.
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The Sun's faint corona will be visible, and the chromosphere, solar prominences, and possibly even a solar flare may be seen.
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Others, such as the one proving the presence of oxygen in the sun's chromosphere, appeared in scientific journals, such as Nature.
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There are also other instruments for viewing the hydrogen-alpha ( red ) and calcium-K ( purple ) light emitted by the chromosphere.
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It is a BY Draconis variable star with an active chromosphere, which means there is a rotational modulation of its luminosity due to star spots.
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On average, there is only a low level of activity in the stellar chromosphere and it is a candidate for being in a Maunder minimum state.
