Search Results - "Morii, Kaho"
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The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). VIII. Dynamics of Embedded Dense Cores
Published in The Astrophysical journal (01-06-2023)“…Abstract We present dynamical properties of 294 cores embedded in twelve IRDCs observed as part of the ASHES Survey. Protostellar cores have higher gas masses,…”
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The Core Population and Kinematics of a Massive Clump at Early Stages: An Atacama Large Millimeter/submillimeter Array View
Published in The Astrophysical journal (01-09-2022)“…Abstract High-mass star formation theories make distinct predictions on the properties of the prestellar seeds of high-mass stars. Observations of the early…”
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The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). IX. Physical Properties and Spatial Distribution of Cores in IRDCs
Published in The Astrophysical journal (01-06-2023)“…Abstract The initial conditions found in infrared dark clouds (IRDCs) provide insights on how high-mass stars and stellar clusters form. We have conducted…”
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Evidence of high-mass star formation through multiscale mass accretion in hub-filament-system clouds
Published in Monthly notices of the Royal Astronomical Society (02-05-2023)“…ABSTRACT We present a statistical study of a sample of 17 hub-filament-system (HFS) clouds of high-mass star formation using high-angular resolution (∼1–2…”
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The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). XI. Statistical Study of Early Fragmentation
Published in The Astrophysical journal (01-05-2024)“…Abstract Fragmentation during the early stages of high-mass star formation is crucial for understanding the formation of high-mass clusters. We investigated…”
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Digging into the Interior of Hot Cores with ALMA (DIHCA). IV. Fragmentation in High-mass Star-forming Clumps
Published in The Astrophysical journal (01-10-2024)“…Abstract Fragmentation contributes to the formation and evolution of stars. Observationally, high-mass stars are known to form multiple-star systems,…”
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The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). X. Hot Gas Reveals Deeply Embedded Star Formation
Published in The Astrophysical journal (01-03-2024)“…Abstract Massive infrared dark clouds (IRDCs) are considered to host the earliest stages of high-mass star formation. In particular, 70 μ m dark IRDCs are the…”
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Digging into the Interior of Hot Cores with ALMA: Spiral Accretion into the High-mass Protostellar Core G336.01–0.82
Published in Astrophysical journal. Letters (01-12-2023)“…Abstract We observed the high-mass star-forming core G336.01–0.82 at 1.3 mm and 0.″05 (∼150 au) angular resolution with the Atacama Large…”
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MagMaR III—Resisting the Pressure, Is the Magnetic Field Overwhelmed in NGC6334I?
Published in The Astrophysical journal (01-09-2024)“…Abstract We report on Atacama Large Millimeter/submillimeter Array observations of polarized dust emission at 1.2 mm from NGC6334I, a source known for its…”
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Magnetic Fields in Massive Star-forming Regions (MagMaR). IV. Tracing the Magnetic Fields in the O-type Protostellar System IRAS 16547–4247
Published in The Astrophysical journal (01-10-2024)“…Abstract The formation of the massive stars, and in particular, the role that the magnetic fields play in their early evolutionary phase is still far from…”
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Magnetic Fields in Massive Star-forming Regions (MagMaR): Unveiling an Hourglass Magnetic Field in G333.46–0.16 Using ALMA
Published in Astrophysical journal. Letters (01-09-2024)“…The contribution of the magnetic field to the formation of high-mass stars is poorly understood. We report the high angular resolution (∼0.″3, 870 au) map of…”
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12
Revealing a Centrally Condensed Structure in OMC-3/MMS 3 with ALMA High-resolution Observations
Published in The Astrophysical journal (01-04-2021)“…Abstract Using the Atacama Large Millimeter/submillimeter Array (ALMA), we investigated the peculiar millimeter source MMS 3 located in the Orion Molecular…”
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The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). II. Molecular Outflows in the Extreme Early Stages of Protocluster Formation
Published in The Astrophysical journal (01-11-2020)“…Abstract We present a study of outflows at extremely early stages of high-mass star formation obtained from the ALMA Survey of 70 μ m dark High-mass clumps in…”
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The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). VI. The Core-scale CO Depletion
Published in The Astrophysical journal (01-09-2022)“…Abstract Studying the physical and chemical properties of cold and dense molecular clouds is crucial for the understanding of how stars form. Under the typical…”
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The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). IV. Star Formation Signatures in G023.477
Published in The Astrophysical journal (01-12-2021)“…Abstract With a mass of ∼1000 M ⊙ and a surface density of ∼0.5 g cm −2 , G023.477+0.114, also known as IRDC 18310-4, is an infrared dark cloud (IRDC) that has…”
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The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). III. A Young Molecular Outflow Driven by a Decelerating Jet
Published in The Astrophysical journal (01-06-2021)“…Abstract We present a spatio-kinematical analysis of the CO ( J = 2 → 1) line emission, observed with the Atacama Large Millimeter/submillimeter Array (ALMA),…”
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The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). V. Deuterated Molecules in the 70 μm Dark IRDC G14.492-00.139
Published in The Astrophysical journal (01-02-2022)“…Abstract We have observed the 70 μ m dark infrared dark cloud (IRDC) G14.492-00.139 in the N 2 D + J = 3–2, DCO + J = 3–2, DCN J = 3–2, and C 18 O J = 2–1…”
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The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). VII. Chemistry of Embedded Dense Cores
Published in The Astrophysical journal (01-11-2022)“…Abstract We present a study of the chemistry toward 294 dense cores in 12 molecular clumps, using data obtained from the ALMA Survey of 70 μ m dark High-mass…”
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The ALMA Survey of Star Formation and Evolution in Massive Protoclusters with Blue Profiles (ASSEMBLE): Core Growth, Cluster Contraction, and Primordial Mass Segregation
Published in The Astrophysical journal. Supplement series (01-01-2024)“…Abstract The Atacama Large Millimeter/submillimeter Array (ALMA) Survey of Star Formation and Evolution in Massive Protoclusters with Blue Profiles (ASSEMBLE)…”
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The ALMA Survey of 70 m Dark High-mass Clumps in Early Stages (ASHES). II. Molecular Outflows in the Extreme Early Stages of Protocluster Formation
Published in The Astrophysical journal (09-11-2020)“…We present a study of outflows at extremely early stages of high-mass star formation obtained from the ALMA Survey of 70 m dark High-mass clumps in Early…”
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