| Budget Amount *help |
¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Fiscal Year 2020: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
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| Outline of Final Research Achievements |
We have determined the relation between black hole mass and stellar mass of quasar host galaxies out to z ~ 2 using the Hubble Space Telescope and the Subaru telescope. We find that the mass ratio is nearly constant (i.e., non-evolving) over the last 8 billion years of the universe. This is supported by the analysis of 584 quasars from the Sloan Digital Sky Survey which have their host galaxies imaged by the Hyper Suprime-Cam Subaru Strategic Program. We also found for the first time that the dispersion in the mass ratio is nearly constant and in agreement with simulations which include quasar feedback to regulate their joint mass growth. Overall, we find that supermassive black holes and their host galaxies are growing together in a co-evolutionary manner, likely by sharing a common fuel supply which simultaneously provides gas to form new stars, builds up the central stellar mass concentration, and accretes onto the central black hole.
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