The Sun-like activity of the solar twin 18 Scorpii

Jeffrey C. Hall; Gregory W. Henry; G. Wesley Lockwood

doi:10.1086/513195

The Sun-like activity of the solar twin 18 Scorpii

Astrophysics 2008-11-26 v1

Authors: Jeffrey C. Hall , Gregory W. Henry , G. Wesley Lockwood

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Abstract

We present the results of 10 yr of complementary spectroscopic and photometric observations of the solar twin 18 Scorpii. We show that over the course of its ~7 year chromospheric activity cycle, 18 Sco's brightness varies in the same manner as the Sun's and with a likely brightness variation of 0.09%, similar to the 0.1% decadal variation in the total solar irradiance.

Keywords

solar twin 18 Scorpii stellar activity chromospheric cycle brightness variation

Cite

@article{arxiv.astro-ph/0703450,
  title  = {The Sun-like activity of the solar twin 18 Scorpii},
  author = {Jeffrey C. Hall and Gregory W. Henry and G. Wesley Lockwood},
  journal= {arXiv preprint arXiv:astro-ph/0703450},
  year   = {2008}
}

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