Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-09-21
Mon.Not.Roy.Astron.Soc.373:1151-1158,2006
Astronomy and Astrophysics
Astrophysics
Omitted co-authors reinstated. 9 pages, 7 figures, accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2006.11095.x
We present a model of the stellar populations in the fields observed by one of the SuperWASP-N cameras in the 2004 observing season. We use the Besancon Galactic model to define the range of stellar types and metallicities present, and populate these objects with transiting extra-solar planets using the metallicity relation of Fischer & Valenti (2005). We investigate the ability of SuperWASP to detect these planets in the presence of realistic levels of correlated systematic noise (`red noise'). We find that the number of planets that transit with a signal-to-noise ratio of 10 or more increases linearly with the number of nights of observations. Based on a simulation of detection rates across 20 fields observed by one camera, we predict that a total of 18.6 \pm 8.0 planets should be detectable from the SuperWASP-N 2004 data alone. The best way to limit the impact of co-variant noise and increase the number of detectable planets is to boost the signal-to-noise ratio, by increasing the number of observed transits for each candidate transiting planet. This requires the observing baseline to be increased, by spending a second observing season monitoring the same fields.
Christian Damian Joseph
Clarkson William I.
Collier Cameron Andrew
Enoch B.
Evans Aaron
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