Bibcode
Bramich, D. M.; Horne, Keith; Bond, I. A.; Street, R. A.; Collier Cameron, A.; Hood, B.; Cooke, J.; James, D.; Lister, T. A.; Mitchell, D.; Pearson, K.; Penny, A.; Quirrenbach, A.; Safizadeh, N.; Tsapras, Y.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 359, Issue 3, pp. 1096-1116.
Fecha de publicación:
5
2005
Número de citas
52
Número de citas referidas
44
Descripción
We present results from 30 nights of observations of the open cluster
NGC 7789 with the Wide Field Camera on the Isaac Newton Telescope, La
Palma. From ~900 epochs, we obtained light curves and Sloan r'-i'
colours for ~33000 stars, with ~2400 stars having better than 1 per cent
precision. We expected to detect ~2 transiting hot Jupiter planets if 1
per cent of stars host such a companion and a typical hot Jupiter radius
is ~1.2RJ. We find 24 transit candidates, 14 of which we can
assign a period. We rule out the transiting planet model for 21 of these
candidates using various robust arguments. For two candidates, we are
unable to decide on their nature, although it seems most likely that
they are eclipsing binaries as well. We have one candidate exhibiting a
single eclipse, for which we derive a radius of
1.81+0.09-0.00RJ. Three candidates
remain that require follow-up observations in order to determine their
nature.