Japan Geoscience Union Meeting 2018

Presentation information

[EE] Oral

P (Space and Planetary Sciences) » P-CG Complex & General

[P-CG21] Future missions and instrumentation for space and planetary science

Mon. May 21, 2018 1:45 PM - 3:15 PM A01 (Tokyo Bay Makuhari Hall)

convener:Shingo Kameda(School of Science, Rikkyo University), Satoshi Kasahara(The university of Tokyo), Mitsunori Ozaki(金沢大学理工研究域電子情報学系, 共同), Kazuo Yoshioka(Graduate School of frontier Science, The University of Tokyo), Chairperson:Kameda Shingo

2:20 PM - 2:35 PM

[PCG21-09] Ultraviolet Spectrograph for Exoplanet (UVSPEX) onboard World Space Observatory - Ultraviolet (WSO-UV)

*Go Murakami1, Shingo Kameda2, Keigo Enya1, Masahiro Ikoma3, Norio Narita3 (1.Japan Aerospace Exploration Agency, 2.Rikkyo University, 3.The University of Tokyo)

Keywords:Exoplanet, Ultraviolet, Development

The Russian space telescope, World Space Observatory - Ultraviolet (WSO-UV), will be launched in 2023. WSO-UV has a primary mirror with 1.7 m diameter and several spectroscopic instruments. We are now proposing to install a spectrometer, Ultraviolet Spectrograph for Exoplanets (UVSPEX), to WSO-UV in a partnership with Space Research Institute of the Russian Academy of Sciences (IKI). The key science target of UVSPEX is detecting oxygen exospheres of exoplanets by transit observations of Earth-type exoplanets. If the Earth is located in a habitable zone of a M-dwarf star, we expect that it has extremely expanded atmosphere of oxygen due to the short distance from the star and thus strong UV flux. In such case we can detect the oxygen atmosphere of an Earth-type exoplanet by UV transit observation. UVSPEX consists of a input slit, a troidal grating (2400 lines/mm), and a microchannel plate (MCP) detector. The target spectral range is 120-135 nm including OI (130.5 nm) and H Ly-alpha (121.6 nm). As a baseline design, all components are qualified in several space missions (e.g., Hisaki/EXCEED, BepiColombo/PHEBUS, and CLISP). In parallel we have started new to develop a new type of MCP detector to increase the detection efficiency of the instrument. In this presentation we show the key sciences, the preliminary desin, the feasibility of UVSPEX, and current status of our developments.