201 citations · 637 across the 20 of their papers we have counts for
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Dust-to-neutral gas ratio of the intermediate and high velocity HI clouds derived based on the sub-mm dust emission for the whole sky
Takahiro Hayakawa, Yasuo Fukui
We derived the dust-to-HI ratio of the intermediate-velocity clouds (IVCs), the high-velocity clouds (HVCs), and the local HI gas, by carrying out a multiple-regression analysis of…
Rapid and efficient mass collection by a supersonic cloud-cloud collision as a major mechanism of high-mass star formation
Yasuo Fukui, Tsuyoshi Inoue, Takahiro Hayakawa +1
A supersonic cloud-cloud collision produces a shock-compressed layer which leads to formation of high-mass stars via gravitational instability. We carried out a detailed analysis o…
Gas and Dust Properties in the Chamaeleon Molecular Cloud Complex based on the Optically Thick HI
Katsuhiro Hayashi, Ryuji Okamoto, Hiroaki Yamamoto +3
Gas and dust properties in the Chamaeleon molecular cloud complex have been investigated with emission lines from atomic hydrogen (HI) and 12CO molecule, dust optical depth at 353…
Synthetic observations of highly clumped formation of CO and CI clouds in the turbulent interstellar medium; Implications on the seed CO clouds and the CO-dark H gas
Kengo Tachihara, Yasuo Fukui, Takahiro Hayakawa +1
We carried out synthetic observations of a theoretical model of interstellar carbon in CO, C I and C II including H2 formation. The theoretical model based on numerical simulations…
An Intermediate Velocity HI Cloud Falling to the Galactic Disk; Possible Evidence for Low Metallicity HI Gas Originated Outside the Galactic Disk
Yasuo Fukui, Masako Koga, Shohei Maruyama +6
We found that an intermediate velocity cloud (IVC) IVC 86-36 in HI 21 cm emission shows a head-tail distribution toward the Galactic plane with marked parallel filamentary streamer…
The formation of a Spitzer bubble RCW79 triggered by cloud-cloud collision
Akio Ohama, Mikito Kohno, Keisuke Hasegawa +9
Understanding the mechanism of O star formation is one of the most important issues in current astrophysics. It is also an issue of keen interest how O stars affect their surroundi…
Molecular and Atomic Clouds toward the Wolf-Rayet Nebula NGC 2359: Possible Evidence for Isolated High-Mass Star Formation Triggered by a Cloud-Cloud Collision
Hidetoshi Sano, Katsuhiro Hayashi, Rei Enokiya +17
NGC 2359 is an HII region located in the outer Galaxy that contains the isolated Wolf-Rayet (WR) star HD 56925. We present millimeter/submillimeter observations of CO( =…
Properties of Hi-GAL clumps in the inner Galaxy]{The Hi-GAL compact source catalogue. I. The physical properties of the clumps in the inner Galaxy ()
D. Elia, S. Molinari, E. Schisano +83
Hi-GAL is a large-scale survey of the Galactic plane, performed with Herschel in five infrared continuum bands between 70 and 500 m. We present a band-merged catalogue of spatia…
Synthetic Observations of 21cm HI Line Profiles from Inhomogeneous Turbulent Interstellar HI Gas with Magnetic Field
Yasuo Fukui, Takahiro Hayakawa, Tsuyoshi Inoue +5
We carried out synthetic observations of interstellar atomic hydrogen at 21cm wavelength by utilizing the magneto-hydrodynamical numerical simulations of the inhomogeneous turbulen…
HI, CO, and Dust in the Perseus Cloud
Ryuji Okamoto, Hiroaki Yamamoto, Kengo Tachihara +3
Comparison analyses between the gas emission data (HI 21cm line and CO 2.6 mm line) and the Planck/IRAS dust emission data (optical depth at 353 GHz tau353 and dust temperature Td)…
The jet and arc molecular clouds toward Westerlund 2, RCW 49, and HESS J1023-575; 12CO and 13CO (J=2-1 and J=1-0) observations with NANTEN2 and Mopra Telescope
N. Furukawa, A. Ohama, T. Fukuda +20
We have made new CO observations of two molecular clouds, which we call "jet" and "arc" clouds, toward the stellar cluster Westerlund 2 and the TeV gamma-ray source HESS J1023-575.…
HI, CO, and Planck/IRAS dust properties in the high-latitude-cloud complex, MBM 53, 54, 55 and HLCG 92-35; Possible evidence for an optically thick HI envelope around the CO clouds
Yasuo Fukui, Ryuji Okamoto, Ryohei Kaji +9
We present an analysis of the HI and CO gas in conjunction with the Planck/IRAS submillimeter/far-infrared dust properties toward the most outstanding high latitude clouds MBM 53,…
Star Forming Dense Cloud Cores in the TeV γ-ray SNR RX J1713.7-3946
H. Sano, J. Sato, H. Horachi +23
RX J1713.7-3946 is one of the TeV γ-ray supernova remnants (SNRs) emitting synchrotron X rays. The SNR is associated with molecular gas located at ~1 kpc. We made new molecular obs…