[U-08] Large-scale Projects in Earth and Planetary Science

[U08-11] LAPYUTA(Life-environmentology, Astronomy, and PlanetarY Ultraviolet Telescope Assembly) mission

*Fuminori Tsuchiya¹, Go Murakami², Atsushi Yamazaki², Tomoki Kimura³, Masato Kagitani¹, Ryoichi Koga⁵, Jun Kimura⁶, Norio Narita⁴, Shingo Kameda⁷, Masahiro Ikoma⁸, Masami Ouchi^8,4, Masaomi Tanaka⁴, Kei Masunaga², Shotaro Sakai¹, Chihiro Tao⁹, Masaki Kuwabara⁷, Shin Toriumi² (1.Tohoku University, 2.ISAS/JAXA, 3.Tokyo University of Science, 4.The University of Tokyo, 5.Nagoya University, 6.Osaka University, 7.Rikkyo University, 8.NAOJ, 9.NICT)

Ultraviolet observation technique is one of the most powerful tools to cover wide science fields, from planetary science to astronomy. Here we propose a UV space telescope, LAPYUTA (Life-environmentology, Astronomy, and PlanetarY Ultraviolet Telescope Assembly), as a Japanese-leading mission, by using both many heritages of UV instruments for planetary science (e.g., Hisaki) and space telescope techniques for astronomy. We will accomplish the following four goals: (1) dynamics of our solar system planets and moons as the most quantifiable archetypes of extraterrestrial habitable environments in the universe, (2) transit spectroscopy of exoplanetary atmosphere, especially hydrogen and oxygen exospheres, to observe on-going atmospheric escaping predicted to occur on Earth-like exoplanets in the habitable zone of low temperature star system, (3) the unique UV map of the gaseous large-scale structures (LSSs) to test the structure formation scenario of the Λ cold dark matter (CDM) model and to unveil galaxy growth and feedback processes in the LSSs, and (4) the time-domain survey for transient sky in the UV wavelength to witness the first moments of high-energy events such as compact-object mergers and supernovae with a great synergy of the growing facilities of multi-messenger astronomy including gravitational-wave observatories.