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Line 34:
Line 34: − − Procyon A is a relatively young star that is only some 1.7 billion years old<ref>http://kencroswell.com/AgeOfProcyon.html</ref>. Because of the fact that Procyon is much hotter and larger then our Sun, it will exhaust its [[hydrogen]] fuel in the core within a few billion years and evolve into a [[red giant]] before losing its outer layers and become a [[white dwarf]] much like its companion.
→Procyon A
The [[metallicity]] of Procyon A is around 1.4 times that of the Sun, based on its abundance of [[iron]]. It is theorized that Procyon A is metal-rich because it was enriched by Procyon B when the latter puffed out its metals-rich outer layers before becoming a [[white dwarf]]<ref>http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2000PASP..112..827K&db_key=AST&high=38ef9e6de213472</ref>.
The [[metallicity]] of Procyon A is around 1.4 times that of the Sun, based on its abundance of [[iron]]. It is theorized that Procyon A is metal-rich because it was enriched by Procyon B when the latter puffed out its metals-rich outer layers before becoming a [[white dwarf]]<ref>http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2000PASP..112..827K&db_key=AST&high=38ef9e6de213472</ref>.
The star is also a BY Draconis-type [[variable star]]. Although its brightness does change from the point of the observer because of eclipsing by Procyon B, the star varies intrinsically as well. It has a New Suspect Variable (NVS) designation of NVS 3672.
The star is also a BY Draconis-type [[variable star]]. Although its brightness does change from the point of the observer because of eclipsing by Procyon B, the star varies intrinsically as well. It has a New Suspect Variable (NVS) designation of NVS 3672.