290 citations · 667 across the 25 of their papers we have counts for
26 papers
Statistical inference of fast radio burst environments using galaxy number density
Vignesh V. V. Rao, Tetsuya Hashimoto, Tomotsugu Goto +9
Fast radio bursts (FRBs) are bright, millisecond-duration radio transients of unknown origin. They are categorized as repeaters and non-repeaters, possibly indicating distinct prog…
Irregularity in Active Fast Radio Burst Repeaters and Magnetar Periodic Radio Pulses: Time, Energy, and Frequency Analyses
Ellen C. C. Lin, Shotaro Yamasaki, Tomotsugu Goto +1
Fast Radio Bursts (FRBs) are millisecond-duration radio pulses with largely unknown origins, with a subset exhibiting repeating behavior. Magnetars highly magnetized neutron stars…
No Metallicity Preference in Fast Radio Burst Host Galaxies
Shotaro Yamasaki, Tetsuya Hashimoto, Haruka Kusakabe +1
Fast radio bursts (FRBs) are millisecond-duration extragalactic radio transients of unknown origin, and studying their host galaxies could offer clues to constrain progenitor model…
Detailed Time Resolved Spectral and Temporal Investigations of SGR J1550-5418 Bursts Detected with Fermi/Gamma-ray Burst Monitor
Mustafa Demirer, Ersin Göğüş, Yuki Kaneko +3
We have conducted a time-resolved spectral analysis of magnetar bursts originating from SGR J1550-5418. Our analysis utilizes a two-step methodology for temporal segmentation of th…
Decoding the cosmological baryonic fluctuations using localized fast radio bursts
Tzu-Yin Hsu, Tetsuya Hashimoto, Tsung-Ching Yang +7
Aims: The enigma of the missing baryons poses a prominent and unresolved problem in astronomy. Dispersion measures (DM) serve as a distinctive observable of fast radio bursts (FRBs…
Retracing the Cold Plasma Dispersion Law in Pulsar B0329+54: New Insights into Frequency-Dependent Dispersion Measures
Shyam S. Sharma, Tetsuya Hashimoto, Tomotsugu Goto +2
Multiple studies have investigated potential frequency-dependent dispersion measures (DM) in PSR B0329+54, with sensitivities at levels of …
Time-Frequency Correlation of Repeating Fast Radio Bursts: Correlated Aftershocks Tend to Exhibit Downward Frequency Drifts
Shotaro Yamasaki, Tomonori Totani
The production mechanism of fast radio bursts (FRBs)--mysterious, bright, millisecond-duration radio flashes from cosmological distances--remains unknown. Understanding potential c…
Concise Spectrotemporal Studies of Magnetar SGR J1935+2154 Bursts
Ozge Keskin, Ersin Gogus, Yuki Kaneko +6
SGR J1935+2154 has truly been the most prolific magnetar over the last decade: It has been entering into burst active episodes once every 1-2 years since its discovery in 2014, it…
Quantifying chaos and randomness in magnetar bursts
Shotaro Yamasaki, Ersin Gogus, Tetsuya Hashimoto
In this study, we explore the dynamical stability of magnetar bursts within the context of the chaos-randomness phase space for the first time, aiming to uncover unique behaviors c…
Are Odd Radio Circles virial shocks around massive galaxies? Implications for cosmic-ray diffusion in the circumgalactic medium
Shotaro Yamasaki, Kartick C. Sarkar, Zhaozhou Li
Recently, a new population of circular radio (GHz) objects have been discovered at high Galactic latitudes, called the Odd Radio Circles (ORCs). A fraction of the ORCs encirc…
The true fraction of repeating fast radio bursts revealed through CHIME source count evolution
Shotaro Yamasaki, Tomotsugu Goto, Chih-Teng Ling +1
Fast Radio Bursts (FRBs) are classified into repeaters and non-repeaters, with only a few percent of the observed FRB population from the Canadian Hydrogen Intensity Mapping Experi…
Detection Rate of Fast Radio Bursts in the Milky Way with BURSTT
Decmend Fang-Jie Ling, Tetsuya Hashimoto, Shotaro Yamasaki +5
Fast radio bursts (FRBs) are intense bursts of radio emission with durations of milliseconds. Although researchers have found them happening frequently all over the sky, they are s…
On the relation between duration and energy of non-repeating fast radio bursts: census with the CHIME data
Seong Jin Kim, Tetsuya Hashimoto, Bo Han Chen +5
A correlation between the intrinsic energy and the burst duration of non-repeating fast radio bursts (FRBs) has been reported. If it exists, the correlation can be used to estimate…
BURSTT: Bustling Universe Radio Survey Telescope in Taiwan
Hsiu-Hsien Lin, Kai-yang Lin, Chao-Te Li +44
Fast Radio Bursts (FRBs) are bright millisecond-duration radio transients that appear about 1,000 times per day, all-sky, for a fluence threshold 5 Jy ms at 600 MHz. The FRB radio-…
Angular Dependence of Coherent Radio Emission from Magnetars with Multipolar Magnetic Fields
Shotaro Yamasaki, Kazim Yavuz Eksi, Ersin Gogus
The recent detection of a Fast Radio Burst (FRB) from a Galactic magnetar secured the fact that neutron stars (NSs) with super-strong magnetic fields are capable of producing these…
Energy functions of fast radio bursts derived from the first CHIME/FRB catalogue
Tetsuya Hashimoto, Tomotsugu Goto, Bo Han Chen +9
Fast radio bursts (FRBs) are mysterious millisecond pulses in radio, most of which originate from distant galaxies. Revealing the origin of FRBs is becoming central in astronomy. T…
Analytic Modeling of Synchrotron-Self-Compton Spectra: Application to GRB 190114C
Shotaro Yamasaki, Tsvi Piran
Observations of TeV emission from early gamma-ray burst (GRB) afterglows revealed the long sought for inverse Compton (IC) upscattering of the lower energy synchrotron. However, it…
FRB 181112 as a Rapidly-Rotating Massive Neutron Star just after a Binary Neutron Star Merger?: Implications for Future Constraints on Neutron Star Equations of State
Shotaro Yamasaki, Tomonori Totani, Kenta Kiuchi
The light curve of the fast radio burst (FRB) 181112 is resolved into four successive pulses, and the time interval ( ms) between the first and third pulses coincides with…
Multi-Wavelength Constraints on the Outflow Properties of the Extremely Bright Millisecond Radio Bursts from the Galactic Magnetar SGR 1935+2154
Shotaro Yamasaki, Kazumi Kashiyama, Kohta Murase
Extremely bright coherent radio bursts with millisecond duration, reminiscent of cosmological fast radio bursts (FRBs), were co-detected with anomalously-hard X-ray bursts from a G…
Spectral Modification of Magnetar Flares by Resonant Cyclotron Scattering
Shotaro Yamasaki, Yuri Lyubarsky, Jonathan Granot +1
Spectral modification of energetic magnetar flares by resonant cyclotron scattering (RCS) is considered. During energetic flares, photons emitted from the magnetically-trapped fire…
The Galactic Halo Contribution to the Dispersion Measure of Extragalactic Fast Radio Bursts
Shotaro Yamasaki, Tomonori Totani
A new model of the Milky Way (MW) halo component of the dispersion measure (DM) for extragalactic sources, such as fast radio bursts (FRBs), is presented in light of recent diffuse…
Relativistic Fireball Reprise: Radio Suppression at the Onset of Short Magnetar Bursts
Shotaro Yamasaki, Shota Kisaka, Toshio Terasawa +1
There is growing evidence that a clear distinction between magnetars and radio pulsars may not exist, implying the population of neutron stars that exhibit both radio pulsations an…
A search for optical transients associated with Fast Radio Burst 150418
Yuu Niino, Nozomu Tominaga, Tomonori Totani +5
We have searched for optical variability in the host galaxy of the radio variable source which is possibly associated with fast radio burst (FRB) 150418. We compare images of the g…
Repeating and Non-repeating Fast Radio Bursts from Binary Neutron Star Mergers
Shotaro Yamasaki, Tomonori Totani, Kenta Kiuchi
Most of fast radio bursts (FRB) do not show evidence for repetition, and such non-repeating FRBs may be produced at the time of a merger of binary neutron stars (BNS), provided tha…