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Systematic Broad-band X-ray Study of super-Eddington Accretion onto Supermassive Black Holes. I. X-ray Continuum
Alessia Tortosa, Claudio Ricci, Luis C. Ho +6
We present the first systematic broad-band X-ray study of super-Eddington accretion onto SMBHs with simultaneous {\it NuSTAR} and {\it XMM-Newton} or {\it Swift}/XRT observations o…
Detection of stellar light from quasar host galaxies at redshifts above 6
Xuheng Ding, Masafusa Onoue, John D. Silverman +41
The detection of starlight from the host galaxies of quasars during the reionization epoch () has been elusive, even with deep HST observations. The current highest redshift q…
Input optics systems of the KAGRA detector during O3GK
T. Akutsu, M. Ando, K. Arai +246
KAGRA, the underground and cryogenic gravitational-wave detector, was operated for its solo observation from February 25th to March 10th, 2020, and its first joint observation with…
The Assembly of Black Hole Mass and Luminosity Functions of High-redshift Quasars via Multiple Accretion Episodes
Wenxiu Li, Kohei Inayoshi, Masafusa Onoue +1
The early evolution of the quasar luminosity function (QLF) and black hole mass function (BHMF) encodes key information on the physics determining the radiative and accretion proce…
A Lower Bound of Star Formation Activity in Ultra-high Redshift Galaxies Detected with JWST: Implications for Stellar Populations and Radiation Sources
Kohei Inayoshi, Yuichi Harikane, Akio K. Inoue +2
Early results of JWST observations have delivered bright galaxy candidates in greater numbers than expected, enabling construction of the rest-frame UV luminosity fun…
A Candidate of a Least-Massive Black Hole at the First 1.1 Billion Years of the Universe
Masafusa Onoue, Kohei Inayoshi, Xuheng Ding +6
We report a candidate of a low-luminosity active galactic nucleus (AGN) at z=5 that was selected from the first near-infrared images of the JWST CEERS project. This source, named C…
Radiative feedback on supermassive star formation: the massive end of the Population III initial mass function
Daisuke Toyouchi, Kohei Inayoshi, Wenxiu Li +2
Supermassive stars (SMSs) with masses of -- are invoked as possible seeds of high-redshift supermassive black holes, but it remains under de…
The Age of Discovery with the James Webb: Excavating the Spectral Signatures of the First Massive Black Holes
Kohei Inayoshi, Masafusa Onoue, Yuma Sugahara +2
The James Webb Space Telescope (JWST) will open a new window of the most distant universe and unveil the early growth of supermassive black holes (BHs) in the first galaxies. In pr…
Signature of Supersonic Turbulence in Galaxy Clusters Revealed by AGN-driven H Filaments
Haojie Hu, Yu Qiu, Marie-Lou Gendron-Marsolais +5
The hot intracluster medium (ICM) is thought to be quiescent with low observed velocity dispersions. Surface brightness fluctuations of the ICM also suggest that its turbulence is…
Supercritical growth pathway to overmassive black holes at cosmic dawn: coevolution with massive quasar hosts
Haojie Hu, Kohei Inayoshi, Zoltán Haiman +3
Observations of the most luminous quasars at high redshifts () have revealed that the largest supermassive black holes (SMBHs) at those epochs tend to be substantially overm…
Performance of the KAGRA detector during the first joint observation with GEO 600 (O3GK)
KAGRA Collaboration, H. Abe, R. X. Adhikari +212
KAGRA, the kilometer-scale underground gravitational-wave detector, is located at Kamioka, Japan. In April 2020, an astrophysics observation was performed at the KAGRA detector in…
Long-term evolution of supercritical black hole accretion with outflows: a subgrid feedback model for cosmological simulations
Haojie Hu, Kohei Inayoshi, Zoltán Haiman +2
We study the long-term evolution of the global structure of axisymmetric accretion flows onto a black hole (BH) at rates substantially higher than the Eddington value ($\dot{M}_{\r…
On the Connection between Supermassive Black Hole and Galaxy Growth in the Reionization Epoch
Junyao Li, John D. Silverman, Takuma Izumi +6
The correlation between the mass of supermassive black holes (SMBHs; ) and their host galaxies () in the reionization epoch provides valuab…