683 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Tohoku UniversityJP202 papers
- The University of TokyoJP78 papers
- Kyoto UniversityJP59 papers
- National Astronomical Observatory of JapanJP44 papers
- Kavli Institute for the Physics and Mathematics of the UniverseJP40 papers
- Nagoya UniversityJP33 papers
- The University of OsakaJP32 papers
- Massachusetts Institute of TechnologyUS30 papers
- Institute of Space and Astronautical ScienceJP27 papers
- Japan Aerospace Exploration AgencyJP26 papers
- Ehime UniversityJP24 papers
- Institute of Astronomy and Astrophysics, Academia SinicaTW24 papers
13 papers · 2 filters
Molecular-Cloud-Scale Chemical Composition III: Constraints of Average Physical Properties through Chemical Models
Nanase Harada, Yuri Nishimura, Yoshimasa Watanabe +4
It is important to understand the origin of molecular line intensities and chemical composition in the molecular-cloud scale in the Galactic sources because it serves as a benchmar…
Discovery of Dying Active Galactic Nucleus in Arp 187: Experience of Drastic Luminosity Decline within years
Kohei Ichikawa, Junko Ueda, Hyun-Jin Bae +4
Arp 187 is one of the fading active galactic nuclei (AGN), whose AGN activity is currently decreasing in luminosity. We investigate the observational signatures of AGN in Arp 187,…
BAT AGN Spectroscopic Survey - XI. The Covering Factor of Dust and Gas in Swift/BAT Active Galactic Nuclei
Kohei Ichikawa, Claudio Ricci, Yoshihiro Ueda +10
We quantify the luminosity contribution of active galactic nuclei (AGN) to the 12 m, mid-infrared (MIR; 5-38 m), and the total IR (5-1000 m) emission in the local AGN dete…
A multiline study of a high-mass young stellar object in the Small Magellanic Cloud with ALMA: The detection of methanol gas at 0.2 solar metallicity
Takashi Shimonishi, Yoshimasa Watanabe, Yuri Nishimura +5
We report the results of subparsec-scale submillimeter observations towards an embedded high-mass young stellar object in the Small Magellanic Cloud (SMC) with ALMA. Complementary…
MIRIS observation of near-infrared diffuse Galactic light
Y. Onishi, K. Sano, S. Matsuura +17
We report near-infrared (IR) observations of high Galactic latitude clouds to investigate diffuse Galactic light (DGL), which is starlight scattered by interstellar dust grains. Th…
Stellar mass dependence of the 21-cm signal around the first star and its impact on the global signal
Toshiyuki Tanaka, Kenji Hasegawa, Hidenobu Yajima +2
The 21-cm signal in the vicinity of the first stars is expected to reflect properties of the first stars. In this study we pay special attention to tracing the time evolution of th…
Explaining changing-look AGN with state transition triggered by rapid mass accretion rate drop
Hirofumi Noda, Chris Done
We model the broadband (optical/UV and X-ray) continuum spectrum of the "changing-look" active galactic nucleus (AGN) Mrk 1018 as it fades from Seyfert 1 to 1.9 in years.…
Gravitational waves from supermassive black hole binaries in ultra-luminous infrared galaxies
Kohei Inayoshi, Kohei Ichikawa, Zoltan Haiman
Gravitational waves (GWs) in the nano-hertz band are great tools for understanding the cosmological evolution of supermassive black holes (SMBHs) in galactic nuclei. We consider SM…
Condition for dust evacuation from the first galaxies
Hajime Fukushima, Hidenobu Yajima, Kazuyuki Omukai
Dust enables low-mass stars to form from low-metallicity gas by inducing fragmentation of clouds via the cooling by its thermal emission. Dust may, however, be evacuated from star-…
Stunted accretion growth of black holes by combined effect of the flow angular momentum and radiation feedback
Kazuyuki Sugimura, Takashi Hosokawa, Hidenobu Yajima +2
Accretion on to seed black holes (BHs) is believed to play a crucial role in formation of supermassive BHs observed at high-redshift (z>6). Here, we investigate the combined effect…
Suppression of globular cluster formation in metal-poor gas clouds by Lyman-alpha radiation feedback
Makito Abe, Hidenobu Yajima
We study the impact of Ly radiation feedback on globular cluster (GC) formation. In this Letter, we analytically derive the relation between star formation efficiency (SFE) and…
Adsorption energies of carbon, nitrogen, and oxygen atoms on the low-temperature amorphous water ice: A systematic estimation from quantum chemistry calculations
Takashi Shimonishi, Naoki Nakatani, Kenji Furuya +1
We propose a new simple computational model to estimate adsorption energies of atoms and molecules to low-temperature amorphous water ice, and we present the adsorption energies of…
SILVERRUSH. VI. A simulation of Ly emitters in the reionization epoch and a comparison with Subaru Hyper Suprime-Cam survey early data
Akio K. Inoue, Kenji Hasegawa, Tomoaki Ishiyama +12
The survey of Lyman emitters (LAEs) with Subaru Hyper Suprime-Cam, called SILVERRUSH (Ouchi et al.), is producing massive data of LAEs at . Here we present LAE simul…