I renovate my website. Now it relys on Hugo. I adopt the Beautiful Hugo as the theme.
Hello. I am a Senior Research Scientist at iTHEMS/RIKEN, interested in understanding the nature of black holes. As an astronomer, I have been working on both theoretical and observational astrophysics.
Our paper on the evolution of FSRQs is accepted by ApJ.
Title: Cosmological Evolution of FSRQs based on the Swift/BAT 105-month Catalog and Their Contribution to the Cosmic MeV Gamma-ray Background Radiation.
Authors: Koyo Toda, Yasushi Fukazawa, Yoshiyuki Inoue
We present a new X-ray luminosity function of flat-spectrum radio quasars (FSRQs) utilizing the latest Swift/BAT 105-month X-ray source catalog. Contrary to previous studies of FSRQs in the X-ray band, using the luminosity-dependent density evolution model, we find that FSRQs show evolutionary peaks at z∼1−2 depending on luminosities.
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A lecture talk at University of Tokyo
東大駒場の2020年度学術フロンティア講義「数理科学の研究フロンティア：宇宙，物質，生命，情報」において、「ブラックホールを通して紐解く宇宙の歴史」というタイトルで講義をしました。スライドはこちらから。