[7p-S301-1~7] State-of-the art optical science opening up the frontier of earth-like exoplanet exploration

3:30 PM - 4:00 PM JST(6:30 AM - 7:00 AM UTC)

[7p-S301-5] Development of precise radial velocity measurement instruments and the waveguide devices for exoplanet detection and direct imaging-spectroscope

〇Takayuki Kotani^1,2,3, Jun Nishikawa^2,1,3, Motohide Tamura^4,1,2, Takuma Serizawa^5,2, Takashi Kurokawa⁵, Yosuke Tanaka^5,1 (1.Astrobiology center, 2.NAOJ, 3.SOKENDAI, 4.University of Tokyo, 5.Tokyo Univ. of A&T.)

Keywords:

radial velocity,extra-solar planet,waveguide

We developed the InfraRed Doppler (IRD), a high-resolution near-infrared spectrograph for the Subaru Telescope of the National Astronomical Observatory of Japan, to detect exoplanets via the radial velocity method. IRD achieves highly precise and stable radial velocity measurements through excellent thermal stability, the use of a custom-designed mode scrambler, and a laser frequency comb as a stable wavelength reference source. In 2022, this system led to the discovery of a planet approximately four times the mass of Earth. We are also advancing the development of waveguide-based optical circuits to directly extract planetary light as part of future observational strategies.