Kazunari Iwasaki
A5091858054- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Superconducting Materials and Applications
- Magnetic Properties and Applications
- Geomagnetism and Paleomagnetism Studies
- Solidification and crystal growth phenomena
- Solar and Space Plasma Dynamics
- Advanced Condensed Matter Physics
- Advanced Combustion Engine Technologies
- Atmospheric Ozone and Climate
- Superconductivity in MgB2 and Alloys
- Metallurgical Processes and Thermodynamics
National Astronomical Observatory of Japan
2024
Doshisha University
2022
Kyushu Sangyo University
2004
Abstract We report 850 μ m continuum polarization observations toward the filamentary high-mass star-forming region NGC 2264, taken as part of B -fields In STar forming Regions Observations large program on James Clerk Maxwell Telescope. These data reveal a well-structured nonuniform magnetic field in 2264C and 2264D regions with prevailing orientation around 30° from north to east. Field strength estimates virial analysis major clumps indicate that is globally dominated by gravity, while...
We present and analyze observations of polarized dust emission at 850 $\mu$m towards the central 1 pc $\times$ hub-filament structure Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on James Clerk Maxwell Telescope (JCMT) as part BISTRO (B-fields in Star-forming Region Observations) survey. orientations magnetic field follow spiral Mon R2, which well-described by an axisymmetric model. estimate turbulent component using angle difference between our best-fit model underlying...
The powder-in-tube method using an Ag sheath is applied to achieve high current capacity in the tapes of Bi-Pb-Sr-Ca-Cu-O (BPSCCO) with high-Tc phase (Tc=110 K), by a combination process cold working and sintering. Two kinds BPSCCO powder without doping are used as materials for tape fabrication. morphology, structure, critical density Jc investigated on x-ray diffraction, differential thermal analysis, scanning electron microscope, magnetic susceptibility, I-V curves. optimum sintering...
Abstract We present 850 μ m polarization observations of the IC 348 star-forming region in Perseus molecular cloud as part B-fields In STar-forming Region Observation survey. study magnetic properties two cores (HH 211 MMS and MMS) a filamentary structure 348. find that overall field tends to be more perpendicular than parallel region. The fraction decreases with intensity, we estimate trend by power law mean Rice distribution fittings. indices for are much smaller 1, indicative possible...
The powder-in-tube method using an Ag sheath is applied to achieve high current-capacity in the tapes of Bi-Pb-Sr-Ca-Cu-O (BPSCCO) with high-Tc phase, by a combination cold working and sintering. Two kinds BPSCCO powders without doping are used as materials for tape fabrication. XRD, SEM-EDX, magnetic susceptibility I-V characteristics at 77K obtained above presented discussed. An improvement Jc vs. B properties presented.
Abstract 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 Orion integral-shaped filament (ISF) that covers three portions known as OMC-1, OMC-2, and OMC-3. The magnetic field threading ISF seen in JCMT POL-2 map appears a tale three: pinched for twisted nearly uniform A multiscale analysis shows structure OMC-3 is very consistent at all scales, whereas OMC-2 no correlation across...
The formation of molecular clouds out HI gas is the first step toward star formation. Its metallicity dependence plays a key role to determine through cosmic history. Previous theoretical studies with detailed chemical networks calculate thermal equilibrium states and/or evolution under one-zone collapsing background. cloud in reality, however, involves supersonic flows, and thus resolving internal turbulence/density structure three dimension still essential. We here perform...