Bayesian planet searches for the 10 cm/s radial velocity era

Speaker: 
Phil Gregory (UBC Physics & Astronomy)
Event Date and Time: 
Mon, 2015-10-05 15:30 - 16:30
Location: 
Hennings 318
Local Contact: 
Jaymie Matthews
Intended Audience: 
Graduate

Intrinsic stellar variability has become the main limiting factor for planet searches in both transit and radial velocity (RV) data. New spectrographs are under development like ESPRESSO and EXPRES that aim to improve RV precision by a factor of approximately 100 over the current best spectrographs, HARPS and HARPS-N. This will greatly exacerbate the challenge of distinguishing planetary signals from stellar-activity-induced RV signals. At the same time good progress has been made in simulating stellar activity signals. At the Porto 2014 meeting, “Towards Other Earths II,” Xavier Dumusque**challenged the community to a large-scale blind test using the simulated RV data at the 1-m/s level of precision, to understand the limitations of present solutions to deal with stellar signals and to select the best approach. My talk will focus on some of the statistical lesson learned from this challenge with an emphasis on Bayesian methodology.

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