Open AccessSearching for planetary transits in the field of open cluster NGC 6819 – I
Author(s) -
Street R. A.,
Horne Keith,
Lister T. A.,
Penny A. J.,
Tsapras Y.,
Quirrenbach A.,
Safizadeh N.,
Mitchell D.,
Cooke J.,
Cameron A. Collier
Publication year - 2003
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2003.06388.x
Subject(s) - physics , open cluster , stars , photometry (optics) , astrophysics , transit (satellite) , pleiades , astronomy , planetary system , radius , computer science , public transport , computer security , political science , law
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.