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Seminar Seninan Departemen Fisika, 18 April 2022

Fri, 15 Apr 2022
18:46
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Exploring the Atmosphere of Alien Worlds

STEVANUS KRISTIANTO NUGROHO

ASTROBIOLOGY CENTER & NATIONAL ASTRONOMICAL OBSERVATORY
OF JAPAN

Abstract

Today, astronomers have discovered more than 5000 planets outside our solar system. Future transit, radial velocity, and direct imaging surveys will find Earth-like planets in the habitable zone of nearby bright M-dwarfs and hopefully would allow us to search for biomarkers in their atmosphere (e.g., O2, O3, H2O, CH4) using facilities like extremely large telescope, James Webb Space Telescope, etc. The detailed characterisation of Earth-like planet atmospheres, however, is still out of reach with the current facilities. The most feasible target at the present is hot Jupiter around bright stars. Hot Jupiter is a gas-giant planet orbiting very closely around its host star such that the equilibrium temperature is more than 1000 K. This extreme temperature inflates their radius making the scale height and planet-to-stellar flux ratio high enough. These allow us to obtain their spectra at a high signal-to-noise ratio ideal for detailed atmospheric characterisation and the development of more advanced observing and data analysis techniques. In this talk, I will give a review on how we characterise the atmosphere of these exoplanet populations especially using high-resolution spectroscopy including the latest discoveries.

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Topic: Seminar Seninan Departemen Fisika, 18 April 2022
Time: Apr 18, 2022 13:00 JakartaJoin Zoom Meeting
https://its-ac-id.zoom.us/j/99932829222

Meeting ID: 999 3282 9222
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