EPJ Web of Conferences (Apr 2013)

Periodic variability of spotted M dwarfs in WTS

  • Sipőcz B.,
  • Catalán S.,
  • Hodgkin S.,
  • Birkby J.,
  • del Burgo C.,
  • Kovács G.,
  • Pinfield D.J.,
  • Barnes J.R.,
  • Goulding N.T.,
  • Jones H.R.A.,
  • Jeffers S.V.,
  • Nefs S.

DOI
https://doi.org/10.1051/epjconf/20134701006
Journal volume & issue
Vol. 47
p. 01006

Abstract

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We present an analysis of the photometric variability of M dwarfs in the WFCAM Transit Survey, selected from spectral types inferred by their WTS and SDSS colours, with periods detected using a Lomb-Scargle Periodogram Analisys. We estimate population membership of these objects from their tangential velocities and photometric parralaxes. Examples of M dwarfs with variable light curve morphologuies are found. We discuss possible causes for this and make use of models of spotted stars in our interpretation of the results.