Time series analysis of hot Jupiters host stars

We propose the radial velocity analysis of stars hosting hot Jupiters. The data are obtained with the high precision spectrograph HARPS-N installed at the Telescopio Nazionale Galileo in the framework of the INAF-GAPS observing program.

The proposed analysis may include:

• the evaluation of the more suitable data reduction mode
• the study of the correlations between radial velocities and activity indices 
• the frequency analysis of the time series including the evolution of the largest periodogram periodicity with the increasing number of data
• the keplerian fit of the data to obtain the orbital and physical parameters of the planets
• the archival search for additional radial velocity data in order to extend the observation timespan (e.g. stellar activity cycle)
• the comparison of the obtained parameters in the context of similar targets or with respect to the larger exoplanets population

Left panel: radial velocity time series obtained with the HARPS-N spectrograph at the TNG by the GAPS Collaboration showing the orbital motion of the hot Jupiter host star HAT-P-16. The periodicity of the planet can be found as the largest peak in the periodogram (right panel).