: Astronomie: F-type star

stellar astronomy > spectral classification > spectral type > F-type star

F-type star

An F star, or F-type star, is a white or yellowish-white star of spectral type F whose spectrum shows strong absorption lines of ionized calcium which are more prominent than the hydrogen lines. Moderately strong lines due to iron and other heavier elements are also in evidence. Main sequence F stars, of which Procyon is an example, have a surface temperature of 6,050 to 7,220 K, a mass of 1.1 to 1.6 solar masses, and a luminosity of 2 to 7 times that of the Sun. Relatively nearby, late-type members of this category are generally included in the list of target stars for exoplanet searches and targeted SETI programs. (Encyclopedia of Science, by David Darling, https://www.daviddarling.info/encyclopedia/F/Fstar.html)

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