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Delta Pavonis
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==Observations== This object is a [[subgiant]] of [[spectral type]] G8 IV; it will stop [[nuclear fusion|fusing]] [[hydrogen]] at its [[stellar core|core]] relatively soon, starting the process of becoming a [[red giant]]. Hence, Delta Pavonis is 24% brighter than the Sun, but the [[effective temperature]] of its [[stellar atmosphere|outer atmosphere]] is less: 5,571 K.<ref name=Rains2020/> Its mass is 107% of [[solar mass|Sun's mass]],<ref name=Carvalho-Silva2025/> with a radius 120% of [[solar radius|Sun's radius]].<ref name=Rains2020/> Delta Pavonis's surface [[convection zone]] extends downward to about 43.1% of the star's radius, but only contains 4.8% of the star's mass.<ref name=takeda08/> Spectroscopic examination of Delta Pavonis shows that it has a higher abundance of elements heavier than [[helium]] ([[metallicity]]) than does the Sun. This value is typically given in terms of the ratio of [[iron]] (chemical symbol Fe) to hydrogen (H) in a star's atmosphere, relative to that in Sun's atmosphere (iron being a good proxy for the presence of other heavy elements). The metallicity of Delta Pavonis is approximately <math display="block">\begin{smallmatrix}\left [ \frac{Fe}{H} \right ]\ =\ 0.371\end{smallmatrix}</math> This notation gives the [[logarithm]] of the iron-to-hydrogen ratio, relative to that of the Sun, meaning that Delta Pavonis's iron abundance is 235% of that of Sun.<ref name=Carvalho-Silva2025/> It is considered super metal-rich, and the high metallicity has slowed its [[stellar evolution|evolution]].<ref name=Mello/> Studies have shown a correlation between abundant heavy elements in stars, and the presence of a planetary system,<ref name=aaa458_3/> so Delta Pavonis has a greater than average probability of harboring planets.<ref name=Mello/> The age of Delta Pavonis is approximately 6.1 billion years.<ref name=Carvalho-Silva2025/> It appears to be rotating slowly, with a [[projected rotational velocity]] of 0.32 kilometers per second.<ref name=Rains2020/>
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