How will the appearance of a pulsating variable star change as the temperature varies?

There is a class of stars called pulsating variable stars. The temperature of one particular pulsating variable varies periodically from 4,000 to 8,000 Kelvin. Considering both the luminosity and the color of the light, to an observer on Earth, how will the appearance of this star change as the temperature varies?





Thank you!|||As the temperature drops, the star will become dimmer and its colour will change. Many variable stars (especially pulsating ones) go through a range of spectra as they pulse. Sounds like you have a star that changes from F to mid-M, so its colour will go from yellowish white to red. Is it a Cepheid?|||The apparent magnitude of a star depends on its distance, temperature and size. Pulsating stars vary all but their distance. Generally as they expand their surface cools a bit, and as they contract it warms. Thus the two effects, size and temperature, are working against one another. This usually produces a somewhat complex light curve, with a bump in it in the declining stage.


The stars you mention, 4000 to 8000K, are rather small and cool, class M Main Sequence. On Earth these will appear as red stars.|||Both its brightness and its color will change.





Doug