Simulations for Multi-Object Spectrograph Planet Surveys

Details Simulations for Multi-Object Spectrograph Planet Surveys Simulations for Multi-Object Spectrograph Planet Surveys

2007-03-13

arxiv.org/abs/astro-ph/0703344v1

Mon.Not.Roy.Astron.Soc.377:1610-1622,2007

Astronomy and Astrophysics

Astrophysics

15 pages, 10 figures, accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2007.11722.x

Radial velocity surveys for extra-solar planets generally require substantial amounts of large telescope time in order to monitor a sufficient number of stars. Two of the aspects which can limit such surveys are the single-object capabilities of the spectrograph, and an inefficient observing strategy for a given observing window. In addition, the detection rate of extra-solar planets using the radial velocity method has thus far been relatively linear with time. With the development of various multi-object Doppler survey instruments, there is growing potential to dramatically increase the detection rate using the Doppler method. Several of these instruments have already begun usage in large scale surveys for extra-solar planets, such as FLAMES on the VLT and Keck ET on the Sloan 2.5m wide-field telescope. In order to plan an effective observing strategy for such a program, one must examine the expected results based on a given observing window and target selection. We present simulations of the expected results from a generic multi-object survey based on calculated noise models and sensitivity for the instrument and the known distribution of exoplanetary system parameters. We have developed code for automatically sifting and fitting the planet candidates produced by the survey to allow for fast follow-up observations to be conducted. The techniques presented here may be applied to a wide range of multi-object planet surveys.

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