Speaker
Description
We will report on our recent progress in the atmospheric characterizations of exoplanets, using ground-based telescopes, including the 4.1m SOAR telescope, VLT, and CFHT. We have studied 5 hot Jupiters (WASP69b, 121b, 77Ab, 85Ab and MASCARA-4b) with low-resolution transmission spectroscopy and/or high-resolution Doppler spectroscopy. We demonstrate that a 4m class ground-based telescope can impose essential constraints on the chemical compositions and temperature profiles of exoplanet atmospheres and the study of their temporal variabilities. More observing proposals have been submitted and approved to better explore the capability and reliability of the ground-based telescopes/instruments. With high-resolution Doppler spectroscopy, we have successfully re-discovered heavy metals in MASCARA-4b, and revealed new species including Rb and Sm. We report tentative detections of, for example, Li and Ha in the atmospheres of WASP77Ab and 85Ab. This is a great joint effort via China-Chile collaboration.
