Thinkshop 16

The rotation periods of cool stars: Measurements, uses, connections and prospects

23rd - 26th September 2019

Talk

Rotation of young Suns observed by TESS

José-Dias do Nascimento junior, DFTE-UFRN & CfA-SAO

The Transiting Exoplanet Survey Satellite (TESS) is observing more than 200,000 bright stars in the sky and is an important mission for studies of stellar rotation. TESS mission delivered its full frame images (FFIs) with a cadence of 30 minutes with possibilities to re-extracted light curves carefully to avoid field contamination of backing ground stars. In this work we explore the potential of TESS to measure rotation periods of young solar analog stars. We are mainly interested in two aspects. First understand the impact of light curves limited to 27 days and the wide FOV with possible contamination. For a set of 11 young Suns (between a few million years to 2 billion years), we determined rotational periods for those stars as well we explored lithium, activity levels and differential rotation based on spectroscopy, photometric variability and spot modelling. The first look results from our sample shows a deep connection between lithium and rotation, and mass for different ages.