Direct detection of extrasolar planets and circumstellar discs: The Gemini Planet Imager

Data: 
06/02/2019 - 14:00 - 15:00
Local: 
Auditório 2 - Prédio Principal

Direct detection of extrasolar planets and circumstellar discs: The Gemini Planet Imager

 

Luciano Garcia

Observatório de Córdoba, Argentina

 

Since the detection of 2M1207b in 2004, the number of sub-stellar mass companions discovered by the direct imaging technique has increased during the last years. The masses and distances projected to the host star, have prompted the development of new hypotheses about the formation and evolution of the detected companions. Direct detection is also a powerful tool for testing the composition of their atmospheres. Many recent discoveries have been possible thanks to the development of new instrumentations designed for the detection and analysis of extrasolar planets through high contrast images. The Gemini Planet Imager (GPI) instrument of the Gemini Observatory is a coronograph that allows obtaining high contrast images and low-resolution spectra in addition to incorporating polarimetry for the detection of circumstellar discs. In this presentation, we will review the main characteristics of the instrument together with some results obtained through its observations.