Development of X-ray microcalorimeter camera for understanding of hot Universe structure

我们研究了现代宇宙学中的一个遗留问题，即所谓的重子缺失问题。我们采取了两种方法：观测研究和开发一种新的低温探测器。我们为低温探测器微量热计开发了信号多路复用技术，使探测器的带宽提高了一个数量级。通过数值模拟，我们证实了探测器的灵敏度，模拟结果与我们从观测中获得的表面亮度上限一致。

We studied so-called missing baryon problem, which is one of the remaining questions in modern cosmology. We took two approaches : observational study and development of a new cryogenic detector. We have developed signal multiplexing technique for the cryogenic detector microcalorimeters and have extended the bandwidth of the detector by a order of magnitude. By performing numerical simulations, we confirmed the sensitivity of the detector and the simulation is consistent with the upper limit of the surface brightness we obtained from observations.