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Kohei Ichikawa
Kohei Ichikawa
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Year
BAT AGN spectroscopic survey. V. X-ray properties of the Swift/BAT 70-month AGN catalog
C Ricci, B Trakhtenbrot, MJ Koss, Y Ueda, I Del Vecchio, E Treister, ...
The Astrophysical Journal Supplement Series 233 (2), 17, 2017
4062017
BAT AGN spectroscopic survey. I. Spectral measurements, derived quantities, and AGN demographics
M Koss, B Trakhtenbrot, C Ricci, I Lamperti, K Oh, S Berney, K Schawinski, ...
The Astrophysical Journal 850 (1), 74, 2017
2802017
Mid-and far-infrared properties of a complete sample of local active galactic nuclei
K Ichikawa, Y Ueda, Y Terashima, S Oyabu, P Gandhi, K Matsuta, ...
The Astrophysical Journal 754 (1), 45, 2012
1142012
The complete infrared view of active galactic nuclei from the 70 month Swift/BAT catalog
K Ichikawa, C Ricci, Y Ueda, K Matsuoka, Y Toba, T Kawamuro, ...
The Astrophysical Journal 835 (1), 74, 2017
992017
Iron Kα emission in type-I and type-II active galactic nuclei
C Ricci, Y Ueda, S Paltani, K Ichikawa, P Gandhi, H Awaki
Monthly Notices of the Royal Astronomical Society 441 (4), 3622-3633, 2014
962014
The differences in the torus geometry between hidden and non-hidden broad line active galactic nuclei
K Ichikawa, C Packham, CR Almeida, AA Ramos, A Alonso-Herrero, ...
The Astrophysical Journal 803 (2), 57, 2015
942015
BAT AGN Spectroscopic Survey. XI. The Covering Factor of Dust and Gas in Swift/BAT Active Galactic Nuclei
K Ichikawa, C Ricci, Y Ueda, FE Bauer, T Kawamuro, MJ Koss, K Oh, ...
The Astrophysical Journal 870 (1), 31, 2019
932019
The Galaxy Activity, Torus, and Outflow Survey (GATOS)-I. ALMA images of dusty molecular tori in Seyfert galaxies
S García-Burillo, A Alonso-Herrero, CR Almeida, O González-Martín, ...
Astronomy & Astrophysics 652, A98, 2021
782021
BAT AGN spectroscopic survey–II. X-ray emission and high-ionization optical emission lines
S Berney, M Koss, B Trakhtenbrot, C Ricci, I Lamperti, K Schawinski, ...
Monthly Notices of the Royal Astronomical Society 454 (4), 3622-3634, 2015
782015
BAT AGN spectroscopic survey. XX. Molecular gas in nearby hard-X-ray-selected AGN galaxies
MJ Koss, B Strittmatter, I Lamperti, T Shimizu, B Trakhtenbrot, A Saintonge, ...
The Astrophysical Journal Supplement Series 252 (2), 29, 2021
662021
[O iii] λ5007 and X-ray properties of a complete sample of hard X-RAY selected AGNs in the local universe
Y Ueda, Y Hashimoto, K Ichikawa, Y Ishino, AY Kniazev, P Väisänen, ...
The Astrophysical Journal 815 (1), 1, 2015
662015
The eROSITA Final Equatorial-Depth Survey (eFEDS)-Identification and characterization of the counterparts to point-like sources
M Salvato, J Wolf, T Dwelly, A Georgakakis, M Brusa, A Merloni, T Liu, ...
Astronomy & Astrophysics 661, A3, 2022
652022
Luminous quasars do not live in the most overdense regions of galaxies at z ∼ 4
H Uchiyama, J Toshikawa, N Kashikawa, R Overzier, YK Chiang, ...
Publications of the Astronomical Society of Japan 70 (SP1), S32, 2018
602018
The eROSITA Final Equatorial-Depth Survey (eFEDS)-The AGN catalog and its X-ray spectral properties
T Liu, J Buchner, K Nandra, A Merloni, T Dwelly, JS Sanders, M Salvato, ...
Astronomy & Astrophysics 661, A5, 2022
592022
Precessing warped be disk triggering the giant outbursts in 2009 and 2011 in a 0535+ 262/v725 tau
Y Moritani, D Nogami, AT Okazaki, A Imada, E Kambe, S Honda, ...
Publications of the Astronomical Society of Japan 65 (4), 83, 2013
522013
BASS. XXII. The BASS DR2 AGN Catalog and Data
MJ Koss, C Ricci, B Trakhtenbrot, K Oh, JS Den Brok, JE Mejía-Restrepo, ...
The Astrophysical Journal Supplement Series 261 (1), 2, 2022
492022
A kilometre-sized Kuiper belt object discovered by stellar occultation using amateur telescopes
K Arimatsu, K Tsumura, F Usui, Y Shinnaka, K Ichikawa, T Ootsubo, ...
Nature Astronomy 3 (4), 301-306, 2019
482019
The narrow Fe Kα line and the molecular torus in active galactic nuclei: an IR/X-ray view
C Ricci, Y Ueda, K Ichikawa, S Paltani, R Boissay, P Gandhi, M Stalevski, ...
Astronomy & Astrophysics 567, A142, 2014
462014
Infrared and hard X-ray diagnostics of active galactic nucleus identification from the Swift/bat and AKARI all-sky surveys
K Matsuta, P Gandhi, T Dotani, T Nakagawa, N Isobe, Y Ueda, K Ichikawa, ...
The Astrophysical Journal 753 (2), 104, 2012
462012
Infrared 3–4 μm Spectroscopy of Nearby PG QSOs and AGN–Nuclear Starburst Connections in High-Luminosity AGN Populations
M Imanishi, K Ichikawa, T Takeuchi, N Kawakatu, N Oi, K Imase
Publications of the Astronomical Society of Japan 63 (sp2), S447-S456, 2011
462011
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