Volume 306 - XII Multifrequency Behaviour of High Energy Cosmic Sources Workshop (MULTIF2017) - Ongoing Experiments
Focusing On Relativistic universe and Cosmic Evolution: the FORCE mission
K. Mori*, T. Go Tsuru, K. Nakazawa, Y. Ueda, T. Okajima, H. Murakami, H. Awaki, H. Matsumoto, Y. Fukazawa, H. Tsunemi, T. Takahashi and W. W. Zhang
Full text: pdf
Pre-published on: January 30, 2018
Published on: May 30, 2018
Abstract
The Focusing On Relativistic universe and Cosmic Evolution (FORCE) mission is proposed as a future Japan-lead X-ray observatory to be launched in the mid 2020s. FORCE is a successor of Hitomi, focusing on the braodband X-ray imaging spectroscopy in 1--80~keV with a significantly higher angular resolution of $< 15''$ in half-power diameter. The sensitivity above 10 keV will be 10 times higher than that of any previous hard X-ray missions with simultaneous soft X-ray coverage. The satellite is planned to be launched by the Epsilon vehicle by ISAS/JAXA. In the current design concept, FORCE is equipped with three identical pairs of supermirrors and wide-band X-ray detectors. The focal length of the mirrors is 10~m. The silicon mirror with multi-layer coating is our primary choice of optics to achieve a good angular resolution for the wide energy band while maintaining a light weight. The detector is a hybrid of a SOI-CMOS silicon-pixel detector and a CdTe detector responsible for the softer and harder energy bands, respectively. It is basically a descendant of the hard X-ray imager onboard Hitomi with its soft-band detector replaced with the SOI-CMOS. The primary scientific objective of the FORCE mission is to trace the cosmic formation history by searching for missing black holes'' in the entire range of the mass spectrum of BHs: buried'' supermassive black holes (SMBHs) ($>10^4~M_{\odot}$), intermediate-mass black holes ($10^2$--$10^4~M_{\odot}$), and orphan'' stellar-mass black holes ($<10^2~M_{\odot}$). Also, investigation of the nature of relativistic particles at various astrophysical shocks is in our scope, with high-angular-resolution X-ray observations with the broadband coverage. FORCE will open a new era in these fields.
DOI: https://doi.org/10.22323/1.306.0077
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