Periodic variability of spotted M dwarfs in WTS

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

doi:10.1051/epjconf/20134701006

All issues

Volume 47 (2013)

EPJ Web of Conferences, 47 (2013) 01006

Abstract

Open Access

Issue		EPJ Web of Conferences Volume 47, 2013 Hot Planets and Cool Stars


Article Number		01006
Number of page(s)		5
Section		WFCAM Transit Survey
DOI		https://doi.org/10.1051/epjconf/20134701006
Published online		25 April 2013

EPJ Web of Conferences 47, 01006 (2013)
https://doi.org/10.1051/epjconf/20134701006

Periodic variability of spotted M dwarfs in WTS

N.T. Goulding¹^a, J.R. Barnes¹, D.J. Pinfield¹, C. del Burgo²^,3, G. Kovács⁴, J. Birkby⁵, S. Hodgkin⁴, S. Catalán¹, B. Sipőcz¹, H.R.A. Jones¹, S.V. Jeffers⁶ and S. Nefs⁵

¹ Centre for Astrophysics Research, Science & Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB, UK
² Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Aptdo. Postal 51 y 216, 72000 Puebla, Pue, Mexico
³ UNINOVA-CA3, Campus da Caparica, Quinta da Torre, Monte de Caparica 2825-149, Caparica, Portugal
⁴ Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
⁵ Leiden Observatory, Universiteit Leiden, PO Box 9513, 2300 RA Leiden, The Netherlands
⁶ Institut für Astrophysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

^a e-mail: n.t.goulding@herts.ac.uk

Abstract

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.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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