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Tutorial: Detecting Planetary Transits and Radial-Velocity Signals

S. C. C. Barros, J. P. S. Faria

Abstract
Since the discovery of the first exoplanet orbiting a main-sequence star in 1995, more than 3500 planets have been discovered. Most of these were detected and characterized by means of radial-velocity and/or photometric observations. In this tutorial we present examples of exoplanet detection and characterization using these two methods. We start by showing an application of the Box-fitting Least Squares (bls) algorithm to search for a transiting planet signal in the photometric light curve of EPIC 211089792 recorded by K2. Once the transits are detected we then show how to fit a model to the transit light curve and derive the transit parameters using a least-squares minimization algorithm. In a second exercise we show how to detect the same planet based on radial-velocity data and using the Lomb–Scargle periodogram. Finally, we exemplify how to combine the radial velocities and transits of the exoplanet EPIC 211089792b using a Bayesian approach to derive the planetary parameters. This tutorial hence covers some of the state-of-the-art methods of exoplanet search and characterization.

Asteroseismology and Exoplanets: Listening to the Stars and Searching for New Worlds
Tiago L. Campante, Nuno C. Santos, Mário J. P. F. G. Monteiro

Springer
Series Astrophysics and Space Science Proceedings
Volume 49, Page 267
2018 January

>> ADS>> DOI

Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia