Legacy of Hitomi: Power of X-ray high-resolution spectroscopy
Speaker: Dr. Ueda, Shutaro 上田周太朗
Institute of Astronomy and Astrophysics, Academia Sinica
Time: 15:30pm 1st June, 2018 (Friday)
Venue: R521, IoA, 2nd General Building 綜二館R521
Hitomi X-ray Observatory (its former name is ASTRO-H) is 6th Japanese X-ray satellite led by Japan Aerospace Exploration Agency (JAXA) in collaboration with NASA and ESA, and was launched at 2016 February 17. Hitomi is the first X-ray satellite with the X-ray micro-calorimeter (soft X-ray spectrometer: SXS) on the focal plane, which had been expected to achieve the energy resolution of 5 eV (E/ΔE ~ 1200 or Δv ~ 100 km/s). We carried out the in-orbit calibration of the SXS in the commissioning phase and verified that the SXS has the energy resolution we expected. But, unfortunately, we lost Hitomi on March 26. The lifetime of Hitomi was about one month, which is quite short. However, we have succeeded in publishing 13 papers including two Nature papers since the power of X-ray high-resolution spectroscopy is so great. In this talk, I will present a series of Hitomi Collaboration paper, especially revealing gas dynamics in the Perseus galaxy cluster. I will also talk about the future prospects of X-ray astronomy.