7 papers
VLBI Astrometry of Magnetars
Takuya Akahori, Sujin Eie, Kei Amada +8
The origin of the strongest magnetic fields in the Universe, i.e., the origin of magnetars, is a longstanding question. An enhanced dynamo effect in an irregular supernova explosio…
Thermal Spin Polarization Driven by Nuclear Spin-Orbit Coupling in Neutron Star Pasta
Hiroyuki Tajima, Yuta Sekino, Hiroshi Funaki +3
We discuss anomalous spin polarization on the surface of nuclear pasta in a neutron star, driven by a nuclear spin-orbit interaction. We present an effective two-band model of surf…
Constraining the Pulsar Beaming Fraction with TeV-Selected Galactic Pulsar Wind Nebulae and unidentified TeV Sources
Takumi Shimasue, Shota Kisaka, Aya Bamba +1
The pulsar beaming fraction is a fundamental quantity for connecting the observed pulsar population to the intrinsic Galactic population and for constraining pulsar emission geomet…
Gravitational waves from gaps of neutron stars
Akira Dohi, Asuka Ito, Shota Kisaka
The pulsar magnetosphere is a potential source of continuous gravitational waves due to the rapid charge-discharge process in short timescale, varying the electric-field energy den…
One-week optical observations of pulsed emission from the Crab pulsar with IMONY on the 3.8 m Seimei telescope
Kazuaki Hashiyama, Takeshi Nakamori, Anju Sato +13
We report our optical observations of the Crab pulsar using the Imager of MPPC-based Optical photoN counter from Yamagata (IMONY), a high-time-resolution photon-counting imager wit…
Relic of quadrupole deformation produced in a hot neutron star era
Yasufumi Kojima, Akira Dohi, Shota Kisaka +1
A newly born neutron star is expected to exhibit significant deviations from spherical symmetry, which decay with time. Determining how much deformation remains at present is cruci…