Zobrazeno 1 - 10
of 452
pro vyhledávání: '"Kisaka P"'
Autor:
Shibata, Shinpei, Kisaka, Shota
We investigate the centrifugal acceleration in an axisymmetric pulsar magnetosphere under the ideal-MHD approximation. We solved the field-aligned equations of motion for flows inside the current sheet with finite thickness. We find that flows coming
Externí odkaz:
http://arxiv.org/abs/2407.19138
Autor:
Bamba, Aya, Terada, Yukikatsu, Kashiyama, Kazumi, Kisaka, Shota, Minami, Takahiro, Takahashi, Tadayuki
Strongly magnetized, rapidly rotating massive white dwarfs (WDs) emerge as potential outcomes of double degenerate mergers. These WDs can act as sources of non-thermal emission and cosmic rays, gethering attention as WD pulsars. In this context, we s
Externí odkaz:
http://arxiv.org/abs/2404.14722
We report on the properties of pulsed X-ray emission from eight MeV pulsars using XMM-Newton, NICER, NuSTAR and HXMT data. For the five among eight MeV pulsars, the X-ray spectra can be fitted by a broken-power law model with a break energy of $\sim5
Externí odkaz:
http://arxiv.org/abs/2403.04958
Autor:
Kadota, Kenji, Kisaka, Shota
We investigate the potential of the Square Kilometre Array (SKA) in detecting synchrotron radiation emitted from the decay of sub-GeV dark matter (dark matter with masses below the GeV scale) in the presence of strong magnetic fields. As a concrete s
Externí odkaz:
http://arxiv.org/abs/2312.02707
In the absence of a sufficient amount of plasma injection into the black hole (BH) magnetosphere, the force-free state of the magnetosphere cannot be maintained, leading to the emergence of strong, time-dependent, longitudinal electric field (spark g
Externí odkaz:
http://arxiv.org/abs/2310.12532
Publikováno v:
Journal of Lightwave Technology, 2023
This paper presents a linear least squares method for fiber-longitudinal power profile estimation (PPE), which estimates an optical signal power distribution throughout a fiber-optic link at a coherent receiver. The method finds the global optimum in
Externí odkaz:
http://arxiv.org/abs/2310.04936
Occasional energetic outbursts and anomalous X-ray luminosities are expected to be powered by the strong magnetic field in a neutron star. For a very strong magnetic field, elastic deformation becomes excessively large such that it leads to crustal f
Externí odkaz:
http://arxiv.org/abs/2303.02312
We investigate new solutions for magnetized neutron stars with a barotropic core in magnetohydrodynamic (MHD) equilibrium and a magneto-elastic crust, which was neglected by previous studies concerning stars in MHD equilibrium. The Lorentz force of t
Externí odkaz:
http://arxiv.org/abs/2212.08309
Autor:
Ikebe, Sota, Takefuji, Kazuhiro, Terasawa, Toshio, Eie, Sujin, Akahori, Takuya, Murata, Yasuhiro, Hashimoto, Tetsuya, Kisaka, Shota, Honma, Mareki, Yoshiura, Shintaro, Suzuki, Syunsaku, Oyama, Tomoaki, Sekido, Mamoru, Niinuma, Kotaro, Takeuchi, Hiroshi, Yonekura, Yoshinori, Enoto, Teruaki
We present a detection of a bright burst from FRB 20201124A, which is one of the most active repeating FRBs, based on S-band observations with the 64-m radio telescope at the Usuda Deep Space Center/JAXA. This is the first FRB observed by using a Jap
Externí odkaz:
http://arxiv.org/abs/2211.13835
Publikováno v:
Journal of Lightwave Technology, 2023
This paper presents analytical results on longitudinal power profile estimation (PPE) methods, which visualize signal power evolution in optical fibers at a coherent receiver. The PPE can be formulated as an inverse problem of the nonlinear Schr\"odi
Externí odkaz:
http://arxiv.org/abs/2211.08128