Yasuo Doi
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View article: Second-timescale Glints from Satellites and Space Debris Detected with Tomo-e Gozen
Second-timescale Glints from Satellites and Space Debris Detected with Tomo-e Gozen Open
A search for second-timescale optical transients is one of the frontiers of time-domain astronomy. However, it has been pointed out that reflections of sunlight from Earth-orbiting objects can also produce second-timescale ``glints.'' We c…
View article: An S-shaped Filament Formed Due to Cloud–Cloud Collision in Molecular Cloud G178.28-00.61
An S-shaped Filament Formed Due to Cloud–Cloud Collision in Molecular Cloud G178.28-00.61 Open
We present compelling observational evidence supporting G178.28-00.61 as an early-stage candidate for cloud–cloud collision (CCC), with indications of the formation of an S-shaped filament, evenly separated dense cores, and young star clus…
View article: Magnetic Field of a Ring-like Molecular Cloud
Magnetic Field of a Ring-like Molecular Cloud Open
We present a detailed study of the magnetic field structure in the G111 molecular cloud, a ring-like filamentary cloud within the NGC 7538 region. Our analysis combines multiwavelength polarization data and molecular-line observations to i…
View article: The JCMT BISTRO Survey: Unveiling the Magnetic Fields around Galactic Center
The JCMT BISTRO Survey: Unveiling the Magnetic Fields around Galactic Center Open
We acquired 450 and 850 μ m dust continuum polarization observations toward the inner region of the Central Molecular Zone (CMZ) as part of the B -Fields In Star-forming Region Observations survey using the POL-2 polarimeter on the James C…
View article: The JCMT BISTRO Survey: Magnetic Fields Align with Orbital Structure in the Galactic Center
The JCMT BISTRO Survey: Magnetic Fields Align with Orbital Structure in the Galactic Center Open
We present the magnetic field in the dense material of the Central Molecular Zone (CMZ) of the Milky Way, traced in 850 μ m polarized dust emission as part of the James Clerk Maxwell Telescope B -fields in STar-forming Region Observations …
View article: The JCMT BISTRO Survey: Magnetic Fields Align with Orbital Structure in the Galactic Center
The JCMT BISTRO Survey: Magnetic Fields Align with Orbital Structure in the Galactic Center Open
We present the magnetic field in the dense material of the Central Molecular Zone (CMZ) of the Milky Way, traced in 850 $μ$m polarized dust emission as part of the James Clerk Maxwell Telescope (JCMT) B-fields In STar-forming Region Observ…
View article: A Tale of Three: Magnetic Fields along the Orion Integral-shaped Filament as Revealed by the JCMT BISTRO Survey
A Tale of Three: Magnetic Fields along the Orion Integral-shaped Filament as Revealed by the JCMT BISTRO Survey Open
As part of the B -fields In Star-forming Region Observations survey, we present James Clerk Maxwell Telescope (JCMT) 850 μ m polarimetric observations toward the Orion integral-shaped filament (ISF) that covers three portions known as OMC-…
View article: The JCMT BISTRO Survey: The Magnetic Fields of the IC 348 Star-forming Region
The JCMT BISTRO Survey: The Magnetic Fields of the IC 348 Star-forming Region Open
We present 850 μ m polarization observations of the IC 348 star-forming region in the Perseus molecular cloud as part of the B-fields In STar-forming Region Observation survey. We study the magnetic properties of two cores (HH 211 MMS and …
View article: The JCMT BISTRO Survey: the magnetized evolution of star-forming cores in the Ophiuchus molecular cloud interpreted using histograms of relative orientation
The JCMT BISTRO Survey: the magnetized evolution of star-forming cores in the Ophiuchus molecular cloud interpreted using histograms of relative orientation Open
The relationship between B-field orientation and density structure in molecular clouds is often assessed using the histogram of relative orientations (HRO). We perform a plane-of-the-sky geometrical analysis of projected B-fields, by inter…
View article: The JCMT BISTRO Survey: The magnetised evolution of star-forming cores in the Ophiuchus Molecular Cloud interpreted using Histograms of Relative Orientation
The JCMT BISTRO Survey: The magnetised evolution of star-forming cores in the Ophiuchus Molecular Cloud interpreted using Histograms of Relative Orientation Open
The relationship between B-field orientation and density structure in molecular clouds is often assessed using the Histogram of Relative Orientations (HRO). We perform a plane-of-the-sky geometrical analysis of projected B-fields, by inter…
View article: The JCMT BISTRO Survey: The Magnetic Fields of the IC 348 Star-forming Region
The JCMT BISTRO Survey: The Magnetic Fields of the IC 348 Star-forming Region Open
We present 850 $μ$m polarization observations of the IC 348 star-forming region in the Perseus molecular cloud as part of the B-fields In STar-forming Region Observation (BISTRO) survey. We study the magnetic properties of two cores (HH 21…
View article: Relative alignments between magnetic fields, velocity gradients, and dust emission gradients in NGC 1333
Relative alignments between magnetic fields, velocity gradients, and dust emission gradients in NGC 1333 Open
Magnetic fields play an important role in shaping and regulating star formation in molecular clouds. Here, we present one of the first studies examining the relative orientations between magnetic (B) fields and the dust emission, gas colum…
View article: Relative Alignments Between Magnetic Fields, Velocity Gradients, and Dust Emission Gradients in NGC 1333
Relative Alignments Between Magnetic Fields, Velocity Gradients, and Dust Emission Gradients in NGC 1333 Open
Magnetic fields play an important role in shaping and regulating star formation in molecular clouds. Here, we present one of the first studies examining the relative orientations between magnetic ($B$) fields and the dust emission, gas col…
View article: On the Scarcity of Dense Cores (n > 10<sup>5</sup> cm<sup>−3</sup>) in High-latitude Planck Galactic Cold Clumps
On the Scarcity of Dense Cores (n > 10<sup>5</sup> cm<sup>−3</sup>) in High-latitude Planck Galactic Cold Clumps Open
High-latitude (∣ b ∣ > 30°) molecular clouds have virial parameters that exceed 1, but whether these clouds can form stars has not been studied systematically. Using JCMT SCUBA-2 archival data, we surveyed 70 fields that target high-latitu…
View article: Filamentary Network and Magnetic Field Structures Revealed with BISTRO in the High-mass Star-forming Region NGC 2264: Global Properties and Local Magnetogravitational Configurations
Filamentary Network and Magnetic Field Structures Revealed with BISTRO in the High-mass Star-forming Region NGC 2264: Global Properties and Local Magnetogravitational Configurations Open
We report 850 μ m continuum polarization observations toward the filamentary high-mass star-forming region NGC 2264, taken as part of the B -fields In STar forming Regions Observations large program on the James Clerk Maxwell Telescope. Th…
View article: Filamentary Network and Magnetic Field Structures Revealed with BISTRO in the High-Mass Star-Forming Region NGC2264 : Global Properties and Local Magnetogravitational Configurations
Filamentary Network and Magnetic Field Structures Revealed with BISTRO in the High-Mass Star-Forming Region NGC2264 : Global Properties and Local Magnetogravitational Configurations Open
We report 850 $μ$m continuum polarization observations toward the filamentary high-mass star-forming region NGC 2264, taken as part of the B-fields In STar forming Regions Observations (BISTRO) large program on the James Clerk Maxwell Tele…
View article: Tomographic Imaging of the Sagittarius Spiral Arm's Magnetic Field Structure
Tomographic Imaging of the Sagittarius Spiral Arm's Magnetic Field Structure Open
The Galactic global magnetic field is thought to play a vital role in shaping Galactic structures such as spiral arms and giant molecular clouds. However, our knowledge of magnetic field structures in the Galactic plane at different distan…
View article: Tomographic Imaging of the Sagittarius Spiral Arm's Magnetic Field Structure
Tomographic Imaging of the Sagittarius Spiral Arm's Magnetic Field Structure Open
The Galactic global magnetic field is thought to play a vital role in shaping Galactic structures such as spiral arms and giant molecular clouds. However, our knowledge of magnetic field structures in the Galactic plane at different distan…
View article: Multicolor Photometry of Tiny Near-Earth Asteroid 2015 RN<sub>35</sub> across a Wide Range of Phase Angles: Possible Mission-accessible A-type Asteroid
Multicolor Photometry of Tiny Near-Earth Asteroid 2015 RN<sub>35</sub> across a Wide Range of Phase Angles: Possible Mission-accessible A-type Asteroid Open
Studying small near-Earth asteroids is important in order to understand their dynamical histories and origins as well as to mitigate the damage caused by asteroid impacts on Earth. We report the results of multicolor photometry of the tiny…
View article: Multicolor Photometry of Tiny Near-Earth Asteroid 2015 RN$_{35}$ Across a Wide Range of Phase Angles: Possible Mission Accessible A-type Asteroid
Multicolor Photometry of Tiny Near-Earth Asteroid 2015 RN$_{35}$ Across a Wide Range of Phase Angles: Possible Mission Accessible A-type Asteroid Open
Studying small near-Earth asteroids is important to understand their dynamical histories and origins as well as to mitigate the damage of the asteroid impact to the Earth. We report the results of multicolor photometry of the tiny near-Ear…
View article: Photometry and Polarimetry of 2010 XC<sub>15</sub>: Observational Confirmation of E-type Near-Earth Asteroid Pair
Photometry and Polarimetry of 2010 XC<sub>15</sub>: Observational Confirmation of E-type Near-Earth Asteroid Pair Open
Asteroid systems such as binaries and pairs are indicative of the physical properties and dynamical histories of small solar system bodies. Although numerous observational and theoretical studies have been carried out, the formation mechan…
View article: The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43
The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43 Open
We present observations of polarized dust emission at 850 μ m from the L43 molecular cloud, which sits in the Ophiuchus cloud complex. The data were taken using SCUBA-2/POL-2 on the James Clerk Maxwell Telescope as a part of the BISTRO lar…
View article: Photometry and Polarimetry of 2010 XC$_{15}$: Observational Confirmation of E-type Near-Earth Asteroid Pair
Photometry and Polarimetry of 2010 XC$_{15}$: Observational Confirmation of E-type Near-Earth Asteroid Pair Open
Asteroid systems such as binaries and pairs are indicative of physical properties and dynamical histories of the Small Solar System Bodies. Although numerous observational and theoretical studies have been carried out, the formation mechan…
View article: The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43
The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43 Open
We present observations of polarized dust emission at 850 $μ$m from the L43 molecular cloud which sits in the Ophiuchus cloud complex. The data were taken using SCUBA-2/POL-2 on the James Clerk Maxwell Telescope as a part of the BISTRO lar…
View article: Investigation of mid-infrared long-term variability of dusty AGB stars using multi-epoch scan data of AKARI and WISE
Investigation of mid-infrared long-term variability of dusty AGB stars using multi-epoch scan data of AKARI and WISE Open
Asymptotic giant branch (AGB) stars are one of the main sources of dust in the Universe. They form and supply dust triggered by stellar pulsations, but the details of the mechanism are still unknown. Among all AGB stars, dusty AGB stars ar…
View article: First BISTRO Observations of the Dark Cloud Taurus L1495A-B10: The Role of the Magnetic Field in the Earliest Stages of Low-mass Star Formation
First BISTRO Observations of the Dark Cloud Taurus L1495A-B10: The Role of the Magnetic Field in the Earliest Stages of Low-mass Star Formation Open
We present BISTRO Survey 850 μ m dust emission polarization observations of the L1495A-B10 region of the Taurus molecular cloud, taken at the James Clerk Maxwell Telescope (JCMT). We observe a roughly triangular network of dense filaments.…
View article: First BISTRO observations of the dark cloud Taurus L1495A-B10: the role of the magnetic field in the earliest stages of low-mass star formation
First BISTRO observations of the dark cloud Taurus L1495A-B10: the role of the magnetic field in the earliest stages of low-mass star formation Open
We present BISTRO Survey 850 μm dust emission polarisation observations of the L1495A-B10 region of the Taurus molecular cloud, taken at the JCMT. We observe a roughly triangular network of dense filaments. We detect 9 of the dense starles…
View article: JCMT BISTRO Observations: Magnetic Field Morphology of Bubbles Associated with NGC 6334
JCMT BISTRO Observations: Magnetic Field Morphology of Bubbles Associated with NGC 6334 Open
We study the H ii regions associated with the NGC 6334 molecular cloud observed in the submillimeter and taken as part of the B -fields In STar-forming Region Observations Survey. In particular, we investigate the polarization patterns and…
View article: Simultaneous multicolor photometry of the DESTINY+ target asteroid (3200) Phaethon
Simultaneous multicolor photometry of the DESTINY+ target asteroid (3200) Phaethon Open
Accurate estimations of the brightness of (3200) Phaethon up to lower phase angles are essential for the planning of the on-board camera for the DESTINY+ mission. We carried out intensive observations of Phaethon in the optical wavelength …
View article: JCMT BISTRO Observations: Magnetic Field Morphology of Bubbles Associated with NGC 6334
JCMT BISTRO Observations: Magnetic Field Morphology of Bubbles Associated with NGC 6334 Open
We study the HII regions associated with the NGC 6334 molecular cloud observed in the sub-millimeter and taken as part of the B-fields In STar-forming Region Observations (BISTRO) Survey. In particular, we investigate the polarization patt…