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Authors whose works are in public domain in at least one jurisdiction

List of works by Kohei Ichikawa

1-29 of 29 results

BAT AGN spectroscopic survey–II. X-ray emission and high-ionization optical emission lines

article

BAT AGN Spectroscopic Survey. I. Spectral Measurements, Derived Quantities, and AGN Demographics

scientific article published in the Astrophysical Journal

The differences in the torus geometry between hidden and non-hidden broad line active galactic nuclei

scientific article published in the Astrophysical Journal

[O iii]λ5007 AND X-RAY PROPERTIES OF A COMPLETE SAMPLE OF HARD X-RAY SELECTED AGNs IN THE LOCAL UNIVERSE

scientific article published in the Astrophysical Journal

BAT AGN Spectroscopic Survey. XI. The Covering Factor of Dust and Gas in Swift/BAT Active Galactic Nuclei

scientific article published in the Astrophysical Journal

N uSTAR Hard X-Ray Data and Gemini 3D Spectra Reveal Powerful AGN and Outflow Histories in Two Low-redshift Lyα Blobs

scientific article published in the Astrophysical Journal

The Emission and Distribution of Dust of the Torus of NGC 1068

scientific article published in the Astrophysical Journal

Cooling Timescale of Dust Tori in Dying Active Galactic Nuclei

scientific article published in the Astrophysical Journal

Gravitational Waves from Supermassive Black Hole Binaries in Ultraluminous Infrared Galaxies

scholarly article by Kohei Inayoshi et al published 20 August 2018 in Letters of the Astrophysical Journal

The Subaru HSC Galaxy Clustering with Photometric Redshift. I. Dark Halo Masses versus Baryonic Properties of Galaxies at 0.3 ≤ z ≤ 1.4

scientific article published in 2020

BAT AGN Spectroscopic Survey. XX. Molecular Gas in Nearby Hard-X-Ray-selected AGN Galaxies

scientific article published in February 2021

Tracing the Coevolution Path of Supermassive Black Holes and Spheroids with AKARI-selected Ultraluminous IR Galaxies at Intermediate Redshifts

BASS. XXX. Distribution Functions of DR2 Eddington Ratios, Black Hole Masses, and X-Ray Luminosities

scientific article published in 2022

Hypercubes of AGN Tori (HYPERCAT). II. Resolving the Torus with Extremely Large Telescopes

scientific article published in December 2021

H1821+643: The Most X-Ray and Infrared Luminous Active Galactic Nucleus (AGN) in the Swift/BAT Survey in the Process of Rapid Stellar and Supermassive Black Hole Mass Assembly

BASS. XXV. DR2 Broad-line-based Black Hole Mass Estimates and Biases from Obscuration

scientific article published in July 2022

BASS. XLII. The Relation between the Covering Factor of Dusty Gas and the Eddington Ratio in Nearby Active Galactic Nuclei

scientific article published in December 2023

A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). VII. Redshift Evolution of Radio Galaxy Environments at z = 0.3–1.4

scientific article published in 2022

BASS. XXI. The Data Release 2 Overview

scientific article published in July 2022

BASS. XXVIII. Near-infrared Data Release 2: High-ionization and Broad Lines in Active Galactic Nuclei*

scientific article published in 2022

The origin of the mid-infrared nuclear polarization of active galactic nuclei

scholarly article

Dust Destruction by Charging: A Possible Origin of Gray Extinction Curves of Active Galactic Nuclei

A NuSTAR and XMM-Newton Study of the Two Most Actively Star-forming Green Pea Galaxies (SDSS J0749+3337 and SDSS J0822+2241)

scientific article published in 2019

Finding of a Population of Active Galactic Nuclei Showing a Significant Luminosity Decline in the Past ∼103–104 yr

UNIONS Optical Identifications for VLASS Radio Sources in the Euclid Sky (UNVEIL). I. A Catalog of ∼146,000 Radio Galaxies up to z ∼ 5

scientific article published in November 2025

Implication of Galaxy-scale Negative Feedback by One of the Most Powerful Multiphase Outflows in a Hyperluminous Infrared Galaxy at Intermediate Redshift

BASS. XXIII. A New Mid-infrared Diagnostic for Absorption in Active Galactic Nuclei

scientific article published in 2022

Dust-obscured Galaxies with Broken Power-law Spectral Energy Distributions Discovered by UNIONS

Hypercubes of AGN Tori (HYPERCAT). I. Models and Image Morphology

scientific article published in October 2021