Zobrazeno 1 - 10
of 272
pro vyhledávání: '"Kohei, Ichikawa"'
Publikováno v:
Geoscience Data Journal, Vol 11, Iss 4, Pp 504-513 (2024)
Abstract Historical weather records from Europe indicate that the Earth experienced substantial climate variability, which caused, for instance, the Little Ice Age and the global crisis in the period between the 14th and 19th centuries. However, it i
Externí odkaz:
https://doaj.org/article/6d3dcb843ed24edebc5d4efde485a7cc
Autor:
Shogo NISHIYAMA, Tomohiro KARA, Brian THORSBRO, Hiromi SAIDA, Yohsuke TAKAMORI, Masaaki TAKAHASHI, Takayuki OHGAMI, Kohei ICHIKAWA, Rainer SCHODEL
Publikováno v:
Proceedings of the Japan Academy. Series B, Physical and Biological Sciences, Vol 100, Iss 1, Pp 86-99 (2023)
The tremendous tidal force that is linked to the supermassive black hole (SMBH) at the center of our galaxy is expected to strongly subdue star formation in its vicinity. Stars within 1'' from the SMBH thus likely formed further from the SMBH and mig
Externí odkaz:
https://doaj.org/article/ef271e1f04f44ac7990c06381faed130
Autor:
Kohei Ichikawa, Kunihiko Kaneko
Publikováno v:
PLoS Computational Biology, Vol 20, Iss 3, p e1011897 (2024)
Various animals, including humans, have been suggested to perform Bayesian inferences to handle noisy, time-varying external information. In performing Bayesian inference by the brain, the prior distribution must be acquired and represented by sampli
Externí odkaz:
https://doaj.org/article/42098cb2024941b19cbcf081f49694bb
Autor:
Kohei Inayoshi, Kohei Ichikawa
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 2, p L49 (2024)
The James Webb Space Telescope (JWST) has unveiled numerous massive black holes (BHs) in faint, broad-line active galactic nuclei (AGNs). The discovery highlights the presence of dust-reddened AGN populations, referred to as “little red dots (LRDs)
Externí odkaz:
https://doaj.org/article/7e80298c4ec44d7aac9ce4227129625d
Publikováno v:
Journal of Ophthalmic & Vision Research, Vol 18, Iss 2, Pp 143-149 (2023)
Abstract Purpose: To evaluate the treatment outcome of surgical punctal occlusion with combined canaliculi ablation and punctal suturing in patients with severe dry eye. Methods: Eleven eyes of seven patients were diagnosed with severe dry eye with d
Externí odkaz:
https://doaj.org/article/3d61e9544bb74b0ea558731841dcd1f6
Publikováno v:
IEEE Access, Vol 11, Pp 68171-68183 (2023)
Empirical Dynamic Modeling (EDM) is a mathematical framework for modeling and predicting non-linear time series data. Although EDM is increasingly adopted in various research fields, its application to large-scale data has been limited due to its hig
Externí odkaz:
https://doaj.org/article/47170377ff1848e5a9abf17cc729ef0d
Autor:
Kianhong Lee, Masayuki Akiyama, Kotaro Kohno, Daisuke Iono, Masatoshi Imanishi, Bunyo Hatsukade, Hideki Umehata, Tohru Nagao, Yoshiki Toba, Xiaoyang Chen, Fumi Egusa, Kohei Ichikawa, Takuma Izumi, Naoki Matsumoto, Malte Schramm, Kenta Matsuoka
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 111 (2024)
We present Atacama Large Millimeter/submillimeter Array observations of the [C ii ] 158 μ m line and the underlying continuum emission of TN J0924−2201, which is one of the most distant known radio galaxies at z > 5. The [C ii ] line and 1 mm cont
Externí odkaz:
https://doaj.org/article/6d60473d18c74ebf8b0a63bdd63bc2db
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 164 (2024)
The James Webb Space Telescope (JWST) has recently uncovered the presence of low-luminosity active galactic nuclei (AGNs) at z = 4–11. Spectroscopic observations have provided estimates of the nuclear black hole (BH) masses for these sources, exten
Externí odkaz:
https://doaj.org/article/097b80a325564e9f81cf1c7e339e6b7a
Autor:
Satoshi Yamada, Yoshihiro Ueda, Taiki Kawamuro, Claudio Ricci, Yoshiki Toba, Masatoshi Imanishi, Takamitsu Miyaji, Atsushi Tanimoto, Kohei Ichikawa, Martín Herrera-Endoqui, Shoji Ogawa, Ryosuke Uematsu, Keiichi Wada
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 2, p 153 (2024)
We study “buried” active galactic nuclei (AGNs) almost fully covered by circumnuclear material in ultra/luminous infrared galaxies (U/LIRGs), which show weak ionized lines from narrow-line regions. Employing an indicator of a [O iv ] 25.89 or [Ne
Externí odkaz:
https://doaj.org/article/bef250c3cb2c40ea8fd0a35f8b21ea76
Autor:
Wanqiu He, Masayuki Akiyama, Motohiro Enoki, Kohei Ichikawa, Kohei Inayoshi, Nobunari Kashikawa, Toshihiro Kawaguchi, Yoshiki Matsuoka, Tohru Nagao, Masafusa Onoue, Taira Oogi, Andreas Schulze, Yoshiki Toba, Yoshihiro Ueda
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 152 (2024)
We investigate the black hole mass function (BHMF) and Eddington-ratio distribution function (ERDF) of broad-line active galactic nuclei (AGNs) at z = 4, based on a sample of 52 quasars with i < 23.2 at 3.50 ≤ z ≤ 4.25 from the Hyper Suprime-Cam
Externí odkaz:
https://doaj.org/article/39821e42972f411daa82afbfa89a8b69