54 citations · 269 across the 14 of their papers we have counts for
14 papers
Comparison of Polar Magnetic Fields Derived from MILOS and MERLIN Inversions with Hinode/SOT-SP Data
Masahito Kubo, Daikou Shiota, Yukio Katsukawa +8
The detailed investigation of the polar magnetic field and its time evolution is one of the major achievements of Hinode. Precise measurements of the polar magnetic field are essen…
A Comprehensive Simulation of Solar Wind Formation from the Solar Interior: Significant Cross-field Energy Transport by Interchange Reconnection near the Sun
H. Iijima, T. Matsumoto, H. Hotta +1
The physical connection between thermal convection in the solar interior and the solar wind remains unclear due to their significant scale separation. Using an extended version of…
Magnetic Tornado Properties: A Substantial Contribution to the Solar Coronal Heating via Efficient Energy Transfer
Hidetaka Kuniyoshi, Munehito Shoda, Haruhisa Iijima +1
In solving the solar coronal heating problem, it is crucial to comprehend the mechanisms by which energy is conveyed from the photosphere to the corona. Recently, magnetic tornadoe…
Fast magnetic wave could heat the solar low-beta chromosphere
Yikang Wang, Takaaki Yokoyama, Haruhisa Iijima
Magnetohydrodynamic (MHD) waves are candidates for heating the solar chromosphere, although it is still unclear which mode of the wave is dominant in heating. We perform two-dimens…
A new broadening technique of numerically unresolved solar transition region and its effect on the spectroscopic synthesis using coronal approximation
Haruhisa Iijima, Shinsuke Imada
The transition region is a thin layer of the solar atmosphere that controls the energy loss from the solar corona. Large numbers of grid points are required to resolve this thin tr…
Energy-consistent finite difference schemes for compressible hydrodynamics and magnetohydrodynamics using nonlinear filtering
Haruhisa Iijima
In this paper, an energy-consistent finite difference scheme for the compressible hydrodynamic and magnetohydrodynamic (MHD) equations is introduced. For the compressible magnetohy…
On rising magnetic flux tube and formation of sunspots in a deep domain
H. Hotta, H. Iijima
We investigate the rising flux tube and the formation of sunspots in an unprecedentedly deep computational domain that covers the whole convection zone with a radiative magnetohydr…
Effect of morphological asymmetry between leading and following sunspots on the prediction of solar cycle activity
H. Iijima, H. Hotta, S. Imada
The morphological asymmetry of leading and following sunspots is a well-known characteristic of the solar surface. In the context of large-scale evolution of the surface magnetic f…
Chromospheric polarimetry through multi-line observations of the 850 nm spectral region III: Chromospheric jets driven by twisted magnetic fields
C. Quintero Noda, H. Iijima, Y. Katsukawa +11
We investigate the diagnostic potential of the spectral lines at 850 nm for understanding the magnetism of the lower atmosphere. For that purpose, we use a newly developed 3D simul…
Semi-conservative reduced speed of sound technique for low Mach number flows with large density variations
H. Iijima, H. Hotta, S. Imada
The reduced speed of sound technique (RSST) has been used for efficient simulation of low Mach number flows in solar and stellar convection zones. The basic RSST equations are hype…
ALMA Observations of the Solar Chromosphere on the Polar Limb
Takaaki Yokoyama, Masumi Shimojo, Takenori J. Okamoto +1
We report the results of the Atacama Large Millimeter/sub-millimeter Array (ALMA) observations of the solar chromosphere on the southern polar limb. Coordinated observations with t…
Sunspot Drawings by Japanese Official Astronomers in 1749-1750
Hisashi Hayakawa, Kiyomi Iwahashi, Masashi Fujiyama +7
Sunspot observations with telescopes in 18th century were carried out in Japan as well. One of these sunspot observations is recorded in an account called Sansaizusetsu narabini Ka…
Improvement of solar cycle prediction: Plateau of solar axial dipole moment
H. Iijima, H. Hotta, S. Imada +2
Aims. We report the small temporal variation of the axial dipole moment near the solar minimum and its application to the solar cycle prediction by the surface flux transport (SFT)…
Chromospheric polarimetry through multi-line observations of the 850 nm spectral region
C. Quintero Noda, T. Shimizu, Y. Katsukawa +6
Future solar missions and ground-based telescopes aim to understand the magnetism of the solar chromosphere. We performed a supporting study in Quintero Noda et al. (2016) focused…