Two planets around Kapteyn's star: a cold and a temperate super-Earth orbiting the nearest halo red dwarf

@article{AngladaEscud2014TwoPA,
  title={Two planets around Kapteyn's star: a cold and a temperate super-Earth orbiting the nearest halo red dwarf},
  author={Guillem Anglada-Escud{\'e} and Pamela Arriagada and Mikko Tuomi and Mathias Zechmeister and J. Steven Jenkins and Aviv Ofir and S. Dreizler and Enrico Gerlach and Chris Marvin and Ansgar Reiners and S. V. Jeffers and Rebecca P. Butler and Steven S. Vogt and Pedro J Amado and Cristina Rodr{\'i}guez-L{\'o}pez and Z M Berdi{\~n}as and J. Morin and Jeff Crane and Stephen A. Shectman and Ian Bentley Thompson and Mat'ias D'iaz and Eugenio Rivera and Luis Felipe Prada Sarmiento and Hugh R A Jones},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2014},
  volume={443}
}
  • Guillem Anglada-Escudé, Pamela Arriagada, +21 authors Hugh R A Jones
  • Published 2014
  • Physics
  • Monthly Notices of the Royal Astronomical Society
  • Exoplanets of a few Earth masses can be now detected around nearby low-mass stars using Doppler spectroscopy. In this paper, we investigate the radial velocity variations of Kapteyn's star, which is both a sub-dwarf M-star and the nearest halo object to the Sun. The observations comprise archival and new HARPS, HIRES and PFS Doppler measurements. Two Doppler signals are detected at periods of 48 and 120 days using likelihood periodograms and a Bayesian analysis of the data. Using the same… CONTINUE READING

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