205 citations · 1.4k across the 57 of their papers we have counts for
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Phase Separation of HI in the Draco Nebula: CNM formation Triggered by Colliding WNM Flows
Yuhi Naruse, Hiroaki Yamamoto, Yamato Matsuzuki +3
We investigate the thermal phase structures and kinematics of atomic hydrogen (H I) gas in the Draco nebula to clarify how infalling H I evolves toward cold atomic and molecular cl…
Observations of DNC and DCO toward the -shaped Filament and Starless Cores in the Orion Molecular Clouds
Ken'ichi Tatematsu, Atsushi Nishimura, Hideo Ogawa +25
Although the deuterium fraction is known to be a powerful evolutionary tracer, its variation within individual molecular cloud cores is still poorly understood. The northern …
Head-tail molecular clouds falling onto the Milky Way disk
Mikito Kohno, Yasuo Fukui, Takahiro Hayakawa +13
We report discovery of two CO clouds which are likely falling down to the Galactic plane at more than km s. The clouds show head-tail distributions elongated perpendicu…
Infrared bubble recognition in the Milky Way and beyond using deep learning
Shimpei Nishimoto, Toshikazu Onishi, Atsushi Nishimura +9
We propose a deep learning model that can detect Spitzer bubbles accurately using two-wavelength near-infrared data acquired by the Spitzer Space Telescope and JWST. The model is b…
Predicting reliable H column density maps from molecular line data using machine learning
Yoshito Shimajiri, Yasutomo Kawanishi, Shinji Fujita +13
The total mass estimate of molecular clouds suffers from the uncertainty in the H-CO conversion factor, the so-called factor, which is used to convert the C…
ACA CO() Mapping of the Nearest Spiral Galaxy M33. I. Initial Results and Identification of Molecular Clouds
Kazuyuki Muraoka, Ayu Konishi, Kazuki Tokuda +18
We present the results of ALMA-ACA 7 m-array observations in CO(), CO(), and CO() line emission toward the molecular-gas disk in the Local…
Distance determination of molecular clouds in the 1st quadrant of the Galactic plane using deep learning : I. Method and Results
Shinji Fujita, A. M. Ito, Yusuke Miyamoto +15
Machine learning has been successfully applied in varied field but whether it is a viable tool for determining the distance to molecular clouds in the Galaxy is an open question. I…
An ALMA study of the massive molecular clump N159W-North in the Large Magellanic Cloud: A possible gas flow penetrating one of the most massive protocluster systems in the Local Group
Kazuki Tokuda, Taisei Minami, Yasuo Fukui +18
Massive dense clumps in the Large Magellanic Cloud can be an important laboratory to explore the formation of populous clusters. We report multiscale ALMA observations of the N159W…
Nobeyama 45 m Local Spur CO survey. I. Giant molecular filaments and cluster formation in the Vulpecula OB association
Mikito Kohno, Atsushi Nishimura, Shinji Fujita +13
We have performed new large-scale CO, CO, and CO 1-0 observations toward the Vulpecula OB association () as part of the Nobeyama 45 m Loca…
Massive star formation in the Carina nebula complex and Gum 31 -- II. a cloud-cloud collision in Gum 31
Shinji Fujita, Hidetoshi Sano, Rei Enokiya +10
We present the results of analyses of the 12CO (J=1-0), 13CO (J=1-0), and 12CO (J=2-1) emission data toward Gum 31. Three molecular clouds separated in velocity were detected at -2…
Evidence for a Cloud-Cloud Collision in Sh2-233 Triggering the Formation of the High-mass Protostar Object IRAS 05358+3543
R. I. Yamada, Y. Fukui, H. Sano +7
We have carried out a new kinematical analysis of the molecular gas in the Sh2-233 region by using the CO = 2-1 data taken at 0.5 pc resolution. The molecular gas consist…
A Kinematic Analysis of the Giant Molecular Complex W3; Possible Evidence for Cloud-Cloud Collisions that Triggered OB Star Clusters in W3 Main and W3(OH)
R. I. Yamada, H. Sano, K. Tachihara +6
W3 is one of the most outstanding regions of high-mass star formation in the outer solar circle, including two active star-forming clouds, W3 Main and W3(OH). Based on a new analys…
ALMA Observations of Giant Molecular Clouds in M33 III: Spatially Resolved Features of the Star-Formation Inactive Million-solar-mass Cloud
Hiroshi Kondo, Kazuki Tokuda, Kazuyuki Muraoka +16
We present CO ( = 2-1), CO ( = 2-1), and CO ( = 2-1) observations toward GMC-8, one of the most massive giant molecular clouds (GMCs) in M33 using ALM…
ALMA Observations of Giant Molecular Clouds in M33. II. Triggered High-mass Star Formation by Multiple Gas Colliding Events at the NGC 604 Complex
Kazuyuki Muraoka, Hiroshi Kondo, Kazuki Tokuda +13
We present the results of ALMA observations in CO(), CO(), and CO() lines and 1.3 mm continuum emission toward a massive ($\sim 10^6 M_{\o…
FOREST unbiased Galactic plane imaging survey with the Nobeyama 45 m telescope (FUGIN): Possible evidence of cloud-cloud collisions triggering high-mass star formation in the giant molecular cloud M16 (Eagle Nebula)
Atsushi Nishimura, Shinji Fujita, Mikito Kohno +12
M16, the Eagle Nebula, is an outstanding \HII \ region which exhibits extensive high-mass star formation and hosts remarkable "pillars". We herein obtained new CO 1-0 da…
A kinematic analysis of the CO clouds toward a reflection nebula NGC 2023 observed with the Nobeyama 45 m telescope; Further evidence for a cloud-cloud collision in the Orion region
R. Yamada, R. Enokiya, H. Sano +6
We have analyzed new CO( = 1-0) data in the region of a reflection nebula NGC 2023 with a particular focus on the detailed kinematical properties of the molecular gas. The resul…
Triggered high-mass star formation in the HII region W28A2: A cloud-cloud collision scenario
Katsuhiro Hayashi, Satoshi Yoshiike, Rei Enokiya +15
We report on a study of the high-mass star formation in the the HII region W28A2 by investigating the molecular clouds extended over ~5-10 pc from the exciting stars using the 12CO…
Massive star formation in the Carina nebula complex and Gum 31 -- I. The Carina nebula complex
Shinji Fujita, Hidetoshi Sano, Rei Enokiya +10
Herein, we present results from observations of the 12CO (J=1-0), 13CO (J=1-0), and 12CO (J=2-1) emission lines toward the Carina nebula complex (CNC) obtained with the Mopra and N…
FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45 m telescope (FUGIN). VI. Dense gas and mini-starbursts in the W43 giant molecular cloud complex
Mikito Kohno, Kengo Tachihara, Kazufumi Torii +18
We performed new large-scale CO, CO, and CO 1--0 observations of the W43 giant molecular cloud complex in the tangential direction of the Scutum arm ($l\si…
High-mass star formation in Orion B triggered by cloud-cloud collision: Merging molecular clouds in NGC 2024
Rei Enokiya, Akio Ohama, Rin Yamada +13
We performed new comprehensive CO(=2--1) observations toward NGC 2024, the most active star forming region in Orion B, with an angular resolution of 100'' obtained…
ALMA Observations of Giant Molecular Clouds in M33 I: Resolving Star Formation Activities in the Giant Molecular Filaments Possibly Formed by a Spiral Shock
Kazuki Tokuda, Kazuyuki Muraoka, Hiroshi Kondo +14
We report molecular line and continuum observations toward one of the most massive giant molecular clouds (GMCs), GMC-16, in M33 using ALMA with an angular resolution of 044 $\…
Nobeyama 45-m Cygnus X CO Survey: II Physical Properties of Clumps
Tatsuya Takekoshi, Shinji Fujita, Atsushi Nishimura +6
We report the statistical physical properties of the CO() clumps present in a prominent cluster-forming region, Cygnus X, using the dataset obtained by the Nobeyama 4…
An ALMA view of molecular filaments in the Large Magellanic Cloud II: An early stage of high-mass star formation embedded at colliding clouds in N159W-South
Kazuki Tokuda, Yasuo Fukui, Ryohei Harada +19
We have conducted ALMA CO isotopes and 1.3 mm continuum observations toward filamentary molecular clouds of the N159W-South region in the Large Magellanic Cloud with an angular res…
An ALMA view of molecular filaments in the Large Magellanic Cloud I: The formation of high-mass stars and pillars in the N159E-Papillon Nebula triggered by a cloud-cloud collision
Yasuo Fukui, Kazuki Tokuda, Kazuya Saigo +19
We present the ALMA observations of CO isotopes and 1.3 mm continuum emission toward the N159E-Papillon Nebula in the Large Magellanic Cloud (LMC). The spatial resolution is 0"25-0…