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FGK star

(a star of class F, G, or K)

The name FGK star is used to designate a star that is either an F-type star, a G-type star, or a K-type star. For main sequence stars fitting the category, there is some similarity to their stellar structure as opposed to earlier types or M dwarves, and the Sun falls within it, making it plausible that life would be found in such a system. Some star surveys cover this set of classes, among them some looking for biosignatures.


(star type,spectral type)
https://astronomy.case.edu/2015/09/08/the-fgk-star-spectral-library/

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