activity
20132022
most citedOptically thick HI dominant in the local interstellar medium; an alternative interpretation to "dark gas"

81 citations · 361 across the 12 of their papers we have counts for

collaborators

12 papers

astro-ph.GA2022★ 7 cited

Physical properties of the molecular cloud, N4, in SS433; Evidence for an interaction of molecular cloud with the jet from SS433

Hiroaki Yamamoto, Ryuji Okamoto, Yasuhiro Murata +3

We conducted observations and analyses of the molecular cloud, N4, which is located at ~40 pc from SS433 and the same line of sight as that of the radio shell, in 12CO(J=1-0), 12CO…

astro-ph.GA2020★ 50 cited

Formation of the Musca filament: Evidence for asymmetries in the accretion flow due to a cloud-cloud collision

L. Bonne, S. Bontemps, N. Schneider +11

Context. Dense molecular filaments are ubiquituous in the interstellar medium, yet their internal physical conditions and formation mechanism remain debated. Aims. We study the kin…

astro-ph.GA2019★ 16 cited

Fermi-LAT gamma-ray study of the interstellar medium and cosmic rays in the Chamaeleon Molecular-Cloud Complex: A look at the dark gas as optically thick HI

Katsuhiro Hayashi, Tsunefumi Mizuno, Yasuo Fukui +6

We report a Fermi-LAT -ray analysis for the Chamaeleon molecular-cloud complex using a total column density (NH) model based on the dust optical depth at 353 GHz () wit…

astro-ph.GA2019★ 14 cited

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…

astro-ph.GA2017★ 5 cited

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…

astro-ph.GA2017

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( =…

astro-ph.HE2017★ 42 cited

A detailed study of the interstellar protons toward the TeV -ray SNR RX J0852.04622 (G266.21.2, Vela Jr.); a third case of the -rays and ISM spatial correspondence

Y. Fukui, H. Sano, J. Sato +18

We present a new analysis of the interstellar protons toward the TeV -ray SNR RX J0852.04622 (G266.21.2, Vela Jr.). We used the NANTEN2 CO( = 1-0) and ATCA & Par…

astro-ph.GA2017★ 27 cited

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…

astro-ph.GA2016★ 41 cited

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)…

astro-ph.GA2014★ 81 cited

Optically thick HI dominant in the local interstellar medium; an alternative interpretation to "dark gas"

Y. Fukui, K. Torii, T. Onishi +5

Dark gas in the interstellar medium (ISM) is believed to not be detectable either in CO or Hi radio emission, but it is detected by other means including gamma-rays, dust emission…

astro-ph.GA2014★ 57 cited

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,…

astro-ph.SR2013★ 21 cited

Discovery of possible molecular counterparts to the infrared Double Helix Nebula in the Galactic center

R. Enokiya, K. Torii, M. Schultheis +23

We have discovered two molecular features at radial velocities of -35 km/s and 0 km/s toward the infrared Double Helix Nebula (DHN) in the Galactic center with NANTEN2. The two fea…