Papers › Constraining the evolution of stellar rotation using solar twins
Constraining the evolution of stellar rotation using solar twins
Diego Lorenzo-Oliveira, Jorge Meléndez, Jhon Yana Galarza, Geisa Ponte, Leonardo A. dos Santos, Lorenzo Spina, Megan Bedell, Iván Ramírez, Jacob L. Bean, Martin Asplund
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The stellar Rotation vs. Age relation is commonly considered as a useful tool to derive reliable ages for Sun-like stars. However, in the light of \kepler\ data, the presence of apparently old and fast rotators that do not obey the usual gyrochronology relations led to the hypothesis of weakened magnetic breaking in some stars. In this letter, we constrain the solar rotation evolutionary track using solar twins. Predicted rotational periods as a function of mass, age, [Fe/H] and given critical Rossby number (Ro_(crit)) were estimated for the entire rotational sample. Our analysis favors the smooth rotational evolution scenario and suggests that, if the magnetic weakened breaking scenario takes place at all, it should arise after Ro_(crit)≳2.29 or ages ≳5.3 Gyr (at 95% confidence level).
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