Dr. Boqian Xu Profile

Dr. Boqian Xu

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Proceedings Article | 9 January 2023 Paper

TianLin: a UV-optical large aperture space telescope for habitable worlds

Wei Wang, Meng Zhai, Gang Zhao, Shen Wang, Jifeng Liu, Jin Chang, Boqian Xu, Jifei Wang, Frank Grupp

Proceedings Volume 12507, 125072V (2023) https://doi.org/10.1117/12.2656976

KEYWORDS: Planets, Stars, Exoplanets, Space telescopes, Telescopes, Earth's atmosphere, Ultraviolet radiation, Coronagraphy, Imaging spectroscopy, UV optics

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It is expected that the ongoing and future space-borne planet survey missions including TESS, PLATO will detect thousands of small to medium-sized planets via the transit technique, including over a hundred habitable terrestrial rocky planets. To conduct detailed study of these terrestrial planets, particularly those cool ones with wide orbits, the exoplanet community has proposed various followup missions. The currently proposed ESA mission ARIEL is a first step for this purpose, and it is capable of the characterizations of planets down to warm super-Earths. The NASA HabEx and LUVOIR missions are mega projects to further tackle down to habitable rocky planets, which are now merged and to be launched in 2040-2045 if approved. In the meanwhile, China is funding a concept study of a 6-m class UV to optical space telescope named Tianling (a Chinese word meaning neighbours in the sky) that aims to start its operation around 2035 and last for 5+ years. Tianling will be mainly dedicated for the characterization rocky planets in the habitable zones (HZ) around nearby stars. We describe briefly the concept study of this mission and propose a baseline requirement of the telescope and instrumental parameters based on our preliminary simulation results.

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