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名稱Title
2021天文年會
國立嘉義大學蘭潭校區
5月21日至23日

論文摘要

Twinkle: A Space Mission to Probe Exoplanets

[ Oral ]

Ing-Guey Jiang (NTHU); Li-Chin Yeh (NTHU); Billy Edwards (BSSL); Richard Archer (BSSL)

The Twinkle Space Mission is a space-based observatory that has been conceived to measure the atmospheric composition of exoplanets, stars and solar system objects. The satellite is based on a highheritage platform and will carry a 0.45 m telescope with a visible and infrared spectrograph providing simultaneous wavelength coverage from 0.5 - 4.5 μm. The spacecraft will be launched into a Sunsynchronous low-Earth polar orbit and will operate in this highly stable thermal environment for a baseline lifetime of seven years. Twinkle will have the capability to provide high-quality infrared spectroscopic characterisation of the atmospheres of hundreds of bright exoplanets, covering a wide range of planetary types. It will also be capable of providing phase curves for hot, short-period planets around bright stars targets and of providing ultra-precise photometric light curves to accurately constrain orbital parameters, including ephemerides and transit timing/duration variations present in multi-planet systems. An overview of Twinkle's capabilities will be presented and some example exoplanet surveys to highlight the broad range of targets the mission could observe will be discussed, demonstrating the huge scientific potential of the spacecraft.