THE PAST AND FUTURE HISTORY OF REGULUS

@article{Rappaport2009THEPA,
  title={THE PAST AND FUTURE HISTORY OF REGULUS},
  author={Saul A. Rappaport and Philipp Podsiadlowski and Inbal Horev},
  journal={The Astrophysical Journal},
  year={2009},
  volume={698},
  pages={666 - 675}
}
We show how the recent discovery of a likely close white dwarf companion to the well-known star Regulus, one of the brightest stars in the sky, leads to considerable insight into the prior evolutionary history of this star, including the cause of its current rapid rotation. We infer a relatively narrow range for the initial masses of the progenitor system: M10 = 2.3 ± 0.2 M☉ and M20 = 1.7 ± 0.2 M☉, where M10 and M20 are the initial masses of the progenitors of the white dwarf and Regulus… 

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