Searching for planetary transits in the field of open cluster NGC 6819 – I

Author Info

R. A. Street, Queen's University - Belfast
Keith Horne, University of St. Andrews
T. A. Lister, University of St. Andrews
A. Penny, Rutherford Appleton Laboratory
Y. Tsapras, Queen Mary University of London
A. Quirrenbach, University of California - San Diego
N. Safizadeh, University of California - San Diego
David Mitchell, University of California - San DiegoFollow
J. Cooke, University of California - San Diego
A. Collier Cameron, University of St. Andrews

Recommended Citation

Published in Monthly Notices of the Royal Astronomical Society, Volume 340, April 1, 2003, pages 1287-1297.

NOTE: At the time of publication, the author David Mitchell was not yet affiliated with Cal Poly.

The definitive version is available at https://doi.org/10.1046/j.1365-8711.2003.06388.x.

Abstract

We present results from our survey for planetary transits in the field of the intermediate-age (∼2.5 Gyr), metal-rich ([Fe/H] ∼+0.07) open cluster NGC 6819. We have obtained high-precision time-series photometry for over 38 000 stars in this field and have developed an effective matched-filter algorithm to search for photometric transits. This algorithm identified 8 candidate stars showing multiple transit-like events, plus 3 stars with single eclipses. On closer inspection, while most are shown to be low-mass stellar binaries, some of these events could be the result of brown dwarf companions. The data for one of the single-transit candidates indicate a minimum radius for the companion similar to that of HD 209458b.

Disciplines

Physics

Copyright

2003 Royal Astronomical Society.

Publisher statement

Monthly Notices of the Royal Astronomical Society is published by Blackwell Publishing.