The discontinuous nature of chromospheric activity evolution

G. Pace

doi:10.1007/s10509-010-0310-5

The discontinuous nature of chromospheric activity evolution

Solar and Stellar Astrophysics 2010-02-15 v2

Authors: G. Pace

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Abstract

Chromospheric activity has been thought to decay smoothly with time and, hence, to be a viable age indicator. Measurements in solar type stars in open clusters seem to point to a different conclusion: chromospheric activity undergoes a fast transition from Hyades level to that of the Sun after about 1 Gyr of main--sequence lifetime and any decaying trend before or after this transition must be much less significant than the short term variations.

Keywords

chromospheric activity stellar age indicator solar type stars open clusters hyades main sequence evolution

Cite

@article{arxiv.1002.2567,
  title  = {The discontinuous nature of chromospheric activity evolution},
  author = {G. Pace},
  journal= {arXiv preprint arXiv:1002.2567},
  year   = {2010}
}

Comments

6 pages, 1 figure, to be published in Astrophysics and Space Science

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