Chung-Yeol Ryu

Soongsil University

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Myung-Ki Cheoun

Soongsil University

Tomoyuki Maruyama

Nihon University

Toshitaka Kajino

The University of Tokyo

Nobutoshi Yasutake

Chiba Institute of Technology

Grant J. Mathews

University of Notre Dame

Jun Hidaka

National Astronomical Observatory of Japan

Takami Kuroda

Max Planck Institute for Gravitational Physics

Tomoya Takiwaki

National Astronomical Observatory of Japan

Grant J. Mathews

University of Notre Dame

Chang Ho Hyun

Daegu University

Cooperative Institutions

National Astronomical Observatory of Japan

The University of Tokyo

Soongsil University

University of Wisconsin–Madison

Osaka University

Nihon University

Beihang University

University of Notre Dame

Japan Atomic Energy Agency

Joint Institute for Nuclear Astrophysics

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QHD description of the instability in strongly magnetized neutron stars

Astroparticle Physics (2012)

Chung-Yeol Ryu Myung-Ki Cheoun Toshitaka Kajino Tomoyuki Maruyama Grant J. Mathews

Magnetar

Moment of inertia

10.1016/j.astropartphys.2012.09.005

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Citations (23)

Asymmetric neutrino production in magnetized proto-neutron stars in fully relativistic mean-field approach

AIP conference proceedings (2014)

Tomoyuki Maruyama Toshitaka Kajino Nobutoshi Yasutake Jun Hidaka Takami Kuroda

We calculate the neutrino production cross-section in the proto-neutron-star matter under a strong magnetic field in the relativistic mean-field approach. We introduce a new parameter-set which can reproduce the 1.96 solar mass neutron star. We find that the production process increases emitted neutrinos along the direction parallel to the magnetic field and decrease those along its opposite direction. It means that resultant asymmetry due to the neutrino absorption and scattering process in the magnetic field becomes larger by the addition of the neutrino production process.

10.1063/1.4874075

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Asymmetric Neutrino Reaction from Magnetized Proto-Neutron Stars in fully Relativistic Framework including Hyperons

AIP conference proceedings (2010)

Tomoyuki Maruyama Nobutoshi Yasutake Toshitaka Kajino Myung-Ki Cheoun Chung-Yeol Ryu

We calculate the neutrino scattering and absorption on the hot and dense neutron‐star matter with hyperons under the strong magnetic field using perturbative approach. We find that the absorption cross‐sections show the remarkable angular dependence: its strength is reduced in the direction parallel to the magnetic field and enhanced in the opposite direction. This variation becomes about 2.2 % when the magnetic field is about 2×1017 G.

10.1063/1.3485182

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Asymmetric Neutrino Reaction in Magnetized Proto-Neutron Stars in Fully Relativistic Approach

EPJ Web of Conferences (2012)

Tomoyuki Maruyama Toshitaka Kajino Nobutoshi Yasutake Myung-Ki Cheoun Chung-Yeol Ryu

We calculate asymmetric neutrino absorption and scattering cross sections on hot and dense magnetized neutron-star matter including hyperons in fully relativistic mean-field theory. The absorption/scattering cross sections are suppressed/enhanced incoherently in the direction of the magnetic field B = Bẑ. The asymmetry is 2–4% at the matter density ρ0 ≤ ρB ≤ 3ρ0 and temperature T ≤ 40MeV for B = 2 × 1017G. Then we solve the Boltzmann equation for the neutrino transport in 1D attenuation approximation, and get the result that the kick velocity becomes about 300 km/s for the proto-neutron star with 168 solar mass at T = 20MeV.

10.1051/epjconf/20122004003

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Nuclear Equation of State and Asymmetric Neutrino Emission from Proto-Neutron Stars

Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014) (2015)

Tomoyuki Maruyama Toshitaka Kajino Jun Hidaka Tomoya Takiwaki Nobutoshi Yasutake

r-process

10.7566/jpscp.6.030061

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Effects of the symmetry energy on strongly-magnetized neutron stars in the density-dependent RMF model

Journal of the Korean Physical Society (2013)

Chung-Yeol Ryu Myung-Ki Cheoun

Coupling constant

10.3938/jkps.63.168

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Asymmetric neutrino reaction and pulsar kick in magnetized proto-neutron stars in fully relativistic framework

AIP conference proceedings (2012)

Tomoyuki Maruyama Toshitaka Kajino Nobutoshi Yasutake Myung-Ki Cheoun Chung-Yeol Ryu

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Tomoyuki Maruyama, Toshitaka Kajino, Nobutoshi Yasutake, Myung-Ki Cheoun, Chung-Yeol Ryu; Asymmetric neutrino reaction and pulsar kick in magnetized proto-neutron stars in fully relativistic framework. AIP Conference Proceedings 28 September 2012; 1441 (1): 393–395. https://doi.org/10.1063/1.3700565 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search

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10.1063/1.3700565

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Quantum field theoretic treatment of pion production via proton synchrotron radiation in strong magnetic fields: Effects of Landau levels

Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology (2015)

Tomoyuki Maruyama Myung-Ki Cheoun Toshitaka Kajino Youngshin Kwon Grant J. Mathews

We study pion production from proton synchrotron radiation in the presence of strong magnetic fields by using the exact proton propagator in a strong magnetic field and explicitly including the anomalous magnetic moment. In this exact quantum field approach the magnitude of pion synchrotron emission turns out to be much smaller than that obtained in the semiclassical approach. However, we also find that the anomalous magnetic moment of the proton greatly enhances the production rate about by 2 orders of magnitude.

Landau quantization

Propagator

10.1103/physrevd.91.123007

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Citations (15)

QHD equation of state for strongly magnetized neutron stars

arXiv (Cornell University) (2011)

Chung-Yeol Ryu Myung-Ki Cheoun Toshitaka Kajino Tomoyuki Maruyama Grant J. Mathews

We investigate the quantum hadrodynamic equation of state for neutron stars (with and without including hyperons) in the presence of strong magnetic fields. The deduced masses and radii are consistent with recent observations of high mass neutron stars even in the case of hyperonic nuclei for sufficiently strong magnetic fields. The calculated adiabatic index and the moments of inertia for magnetized neutron stars exhibit rapid changes with density. This may provide some insight into the mechanism of star-quakes and flares in magnetars.

Magnetar

Moment of inertia

10.48550/arxiv.1106.4381

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Asymmetric Neutrino Emission Process in Rapid Spin-Deceleration of Magnetized Proto-Neutron Stars

Proceedings of the 12th Asia Pacific Physics Conference (APPC12) (2014)

Tomoyuki Maruyama Jun Hidaka Toshitaka Kajino Nobutoshi Yasutake Takami Kuroda

Tomoyuki Maruyama1, Jun Hidaka2, Toshitaka Kajino2, Nobutoshi Yasutake3, Takami Kuroda2, Myung-Ki Cheoun4, Chung-Yeol Ryu5 and Grant J. Mathews6 1College of Bioresource Sciences, Nihon University, Fujisawa 252-8510, Japan 2National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan 3Department of Physics, Chiba Institute of Technology, Narashino 275-0023, Japan 4Department of Physics, Soongsil University, Seoul, 156-743, Korea 5General Education Curriculum Center, Hanyang University, Seoul, 133-791, Korea 6Center of Astrophysics, University of Notre Dame, Notre Dame, IN 46556, USA

10.7566/jpscp.1.013042

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