Article
Astronomy & Astrophysics
Z. Y. Zhao, G. Q. Zhang, Y. Y. Wang, Zuo-Lin Tu, F. Y. Wang
Summary: Magnetars have been identified as a potential energy source for fast radio bursts (FRBs), potentially formed by core-collapse explosions and compact binary mergers. The expansion of merger ejecta can produce time-evolving dispersion measure and rotation measure to probe local environments of FRBs. Research has shown that in the binary neutron star merger scenario, the age of the FRB source is estimated to be around 9-10 years, with an ambient medium density of approximately 2.5-3.1 cm(-3).
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Dongzi Li, J. J. Zanazzi
Summary: Recent observations of the periodic fast radio burst source FRB 180916 show small linear polarization position angle swings during and between bursts, with narrower and earlier burst windows at higher frequencies. The authors propose altitude-dependent radio emission from a magnetar to explain the observations, suggesting that the periodicity in FRB 180916 may originate from the motion of a bursting magnetar. Further observational tests are proposed to differentiate between theories and identify the true explanation for the periodicity.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Astronomy & Astrophysics
Liam Connor, Vikram Ravi
Summary: The detection rates and optimal methods for finding gravitational lensing of fast radio bursts (FRBs) are still uncertain. We forecast detection rates of gravitational lensing on timescales ranging from microseconds to years, considering different lens masses and the redshift distribution of FRBs. We discuss the dominant role of strong stellar lensing on microsecond timescales and the potential for detecting millilensing events from intermediate mass black holes or small dark matter halos. We also propose a new application of FRB gravitational lensing to directly measure the circumgalactic medium of intervening galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Maxim Barkov, Sergei B. Popov
Summary: Long-term periodicity in the rate of flares is observed for two repeating sources of fast radio bursts (FRBs). A hydrodynamical modelling of a massive binary consisting of a magnetar and an early-type star reveals that only during a fraction of the orbital period, radio emission can escape the system, explaining the periodic activity of the two repeating FRB sources.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Nipuni T. Palliyaguru, Devansh Agarwal, Golnoosh Golpayegani, Ryan Lynch, Duncan R. Lorimer, Benjamin Nguyen, Alessandra Corsi, Sarah Burke-Spolaor
Summary: The origin of fast radio bursts (FRBs) remains a mystery, with growing evidence suggesting a connection to magnetars. Searches using large single-dish telescopes did not find similar radio bursts, supporting hypotheses of a steep power-law index and a large cut-off luminosity.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
F. Crawford, S. Hisano, M. Golden, T. Kikunaga, A. Laity, D. Zoeller
Summary: This study presents four new fast radio bursts (FRBs) discovered in the Parkes 70-cm pulsar survey data archive. These FRBs have significantly larger widths than previously detected ones, suggesting the presence of a larger population of wide-pulse FRBs. The study also highlights the importance of pulsar survey archives as a source of previously undetected FRBs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Rachel C. Zhang, Bing Zhang, Ye Li, Duncan R. Lorimer
Summary: Fast radio bursts (FRBs) are millisecond-duration radio transients from cosmological distances. The study attempts to constrain both the energy distribution and redshift distribution of FRBs through simulations and comparisons with available data. The power-law index of the energy distribution is around -1.8, but the redshift distribution remains unconstrained.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Jeferson A. S. Fortunato, Wiliam S. Hipolito-Ricaldi, Marcelo V. dos Santos
Summary: This study used cosmography to analyze a sample of 23 well-localized FRBs and estimated the kinematic parameters and Hubble constant. The study also found that FRBs can be used to explore the "Missing Baryons" problem in the universe.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
C. W. James, E. M. Ghosh, J. X. Prochaska, K. W. Bannister, S. Bhandari, C. K. Day, A. T. Deller, M. Glowacki, A. C. Gordon, K. E. Heintz, L. Marnoch, S. D. Ryder, D. R. Scott, R. M. Shannon, N. Tejos
Summary: This study constrains the Hubble constant H-0 using Fast Radio Burst (FRB) observations from ASKAP and Parkes telescopes. The best-fitting value of H-0 is calculated to be 73 km s(-1) Mpc(-1). The study also explores the relationship between FRB populations and redshift and star-formation rate.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Chen-Hui Niu, Di Li, Rui Luo, Wei-Yang Wang, Jumei Yao, Bing Zhang, Wei-Wei Zhu, Pei Wang, Haoyang Ye, Yong-Kun Zhang, Jia-rui Niu, Ning-yu Tang, Ran Duan, Marko Krco, Shi Dai, Yi Feng, Chenchen Miao, Zhichen Pan, Lei Qian, Mengyao Xue, Mao Yuan, Youling Yue, Lei Zhang, Xinxin Zhang
Summary: FAST discovered three new FRBs through the CRAFTS survey, showing similar characteristics to previously reported FRBs but with some new features, providing new insights for FRB research.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Astronomy & Astrophysics
Qiao-Chu Li, Yuan-Pei Yang, F. Y. Wang, Kun Xu, Zi-Gao Dai
Summary: This study proposes that the high burst rate of FRB repeaters may be due to plate collisions in the crust of young neutron stars (NSs). These plate collisions could launch Alven waves and further produce FRBs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Charles D. Kilpatrick, Joseph N. Burchett, David O. Jones, Ben Margalit, Russet McMillan, Wen-fai Fong, Kasper E. Heintz, Nicolas Tejos, Alicia Rouco Escorial
Summary: The study presented deep optical observations of a periodic fast radio burst (FRB) 180916.J0158+65 within seconds of its radio emission, but did not detect any transient optical emission. This constrains scenarios related to the burst energy and the circumburst density.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Astronomy & Astrophysics
P. Beniamini, Z. Wadiasingh, J. Hare, K. M. Rajwade, G. Younes, A. J. van der Horst
Summary: Two recent discoveries, namely PSR J0901-4046 and GLEAM-X J162759.5-523504.3, have confirmed the existence of radio-loud periodic sources with long periods. These sources cannot be explained by rotation losses, and GLEAM-X J1627 is considered to be a highly magnetized object consistent with a magnetar. The presence of these objects suggests a widespread survival of magnetar-like fields and they may also be a second class of FRB progenitors.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
R. A. Main, G. H. Hilmarsson, V. R. Marthi, L. G. Spitler, R. S. Wharton, S. Bethapudi, D. Z. Li, H-H Lin
Summary: The scintillation and scattering measurements of FRB20201124A suggest a scattering screen closer to Earth, which can help improve Galactic electron density models.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
C. W. James, J. X. Prochaska, J. -P. Macquart, F. O. North-Hickey, K. W. Bannister, A. Dunning
Summary: We have developed a sophisticated model to investigate fast radio bursts (FRBs), considering various factors such as cosmological gas distribution, host galaxy contributions, and observational biases. Our analysis provides the most detailed account of observational biases and significantly improves the accuracy and precision of FRB observations. Based on the data from ASKAP and Parkes, we present the best-fitting FRB population parameters and discuss the expected and fitted distributions in redshift, dispersion measure, and signal to noise. Our results suggest that the highest-dispersion measure events detected in the unlocalized Parkes and ASKAP samples are unlikely to be the most distant. This study highlights the importance of localized FRBs for understanding the DM-z relation and points out the limitations in our analysis, such as uncertainties in FRB spectral behavior and sensitivity response of search experiments, as well as the treatment of the repeating population and luminosity function.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Shu-Qing Zhong, Wen-Jin Xie, Can-Min Deng, Long Li, Zi-Gao Dai, Hai-Ming Zhang
Summary: This study performs a statistical analysis on the CHIME/FRB catalog to investigate the differences between repeating and non-repeating FRBs. The findings suggest that there might be two populations of FRBs, as the distribution distinctions for certain properties cannot be explained by the beamed emission.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Z. Y. Zhao, G. Q. Zhang, F. Y. Wang, Z. G. Dai
Summary: Recent observations have found that some repeating fast radio bursts (FRBs) exhibit complex variations and reversals in Faraday rotation measures (RMs), suggesting they originate from magnetized environments. One possible explanation is that pulsars in binary systems, particularly those with high-mass companions and strong stellar outflows, generate these repeating FRBs. In this study, the researchers investigate the RM variations caused by stellar winds and a potential stellar disk, suggesting that by monitoring long-term RM changes, the environments of repeating FRBs can be revealed.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Ze-Nan Liu, Wei-Yang Wang, Yuan-Pei Yang, Zi-Gao Dai
Summary: It has been found that highly circularly polarized radio bursts exist in Fast Radio Bursts (FRBs). The significant circular polarization may be produced by coherent curvature radiation from bunches with deviating line of sight from the bunch central trajectories. Simulation studies show that radio bursts with high circular polarization typically have a relatively low flux, and most bursts have a small variation in depolarization degrees within a wide frequency band.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Jia Ren, Yun Wang, Lu-Lu Zhang, Zi-Gao Dai
Summary: In this paper, the dynamics and radiation physics of the afterglow of the rare event GRB 221009A are modeled in detail. By introducing a top-hat jet in an environment dominated by stellar winds, the observations of the afterglow associated with GRB 221009A over the first week are explained. The model predicts a luminous very high energy afterglow for GRB 221009A based on the synchrotron self-Compton process.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Ken Chen, Jia Ren, Zi-Gao Dai
Summary: This paper investigates the specific accretion process of compact objects in active galactic nuclei disks and the role of outflow feedback. The study shows that outflow feedback can significantly reduce the mass growth rate of compact objects and protect the disks from excessive accretion.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Zheng-Yan Liu, Zhe-Yu Lin, Ji-Ming Yu, Hui-Yu Wang, Gibran-Marc Mourani, Wen Zhao, Zi-Gao Dai
Summary: This article investigates the detection capabilities of the Wide-Field Survey Telescope (WFST) for kilonovae through simulated images. The results show that WFST performs better in the g and r bands and can detect 90% (50%) of kilonovae at a luminosity distance of 248 Mpc (338 Mpc) with 30 s exposures when kilonovae are at peak luminosity.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Shu-Qing Zhong, Long Li, Zi-Gao Dai
Summary: The gamma-ray burst GRB 211211A and its associated kilonova-like emission were recently reported. The main burst of GRB 211211A could be produced by magnetic bubble eruptions from toroidal magnetic field amplification within a neutron star-white dwarf merger. The observed energetics and duration of GRB 211211A can be explained by a hydrodynamical thermonuclear simulation as long as the white dwarf has a mass greater than or similar to 1 solar mass.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
F. Y. Wang, Q. Wu, Z. G. Dai
Summary: Research has found that the repetition pattern of FRBs shows a large range of time memory, from a few minutes to about an hour. This memory is detected through burst-rate structures and the Hurst exponent. The waiting time distribution follows an approximate power-law tail, consistent with a time-varying Poisson model. Simulations suggest that these characteristics can be explained within a self-organized criticality system driven in a correlation way, such as random walk functions. These properties indicate a correlated triggering mechanism, favoring the crustal failure mechanism of neutron stars.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Run-Chao Chen, Can-Min Deng, Xiang-Gao Wang, Zi-Min Zhou, Xing Yang, Da-Bin Lin, Qi Wang, En-Wei Liang
Summary: The detection of quasi-periodic oscillations (QPOs) in magnetar giant flares (GFs) has provided new insights into understanding the mechanism of magnetar bursts. In this study, we report the detection of a narrow QPO at approximately 110 Hz and a wide QPO at approximately 60 Hz in the short magnetar burst SGR 150228213, with a confidence level of 3.35σ. Although this burst was initially attributed to 4U 0142+61, we have not observed such QPOs in other bursts from this magnetar. Additionally, we found a repeating fast radio burst associated with SGR 150228213 on location.
RESEARCH IN ASTRONOMY AND ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Mi-Xiang Lan, Xue-Feng Wu, Zi-Gao Dai
Summary: The influence of the equal arrival time surface (EATS) effect in a stratified medium on afterglow polarizations is investigated, and the polarization properties of multiband afterglows are predicted. The results show that the EATS effect becomes important for off-axis detections and causes the polarization degree (PD) bumps to shift to later times. The polarization properties of jet emission can evolve even with fixed magnetic field configurations, jet structure, and observational angles, and this evolution is mainly determined by the flux ratio f(32) and the bulk Lorentz factor γ.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Zhao-Yang Xia, Yuan-Pei Yang, Qiao-Chu Li, Fa-Yin Wang, Bo-Yang Liu, Zi-Gao Dai
Summary: In this paper, the authors investigate the polarization evolution of fast radio bursts (FRBs) by analyzing the Faraday conversion (FC) effect in a binary system involving an FRB source. They find that the radial magnetic field of a strongly magnetized high-mass companion star can induce circular polarization (CP) in an FRB, with the degree of CP oscillating symmetrically around the zero point. The authors also observe significant polarization variations near the superior conjunction of the binary orbit and explore the effect of the rotation of the companion star.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Long Li, Shu-Qing Zhong, Zi-Gao Dai
Summary: Whether binary neutron star mergers are the only source of r-process nucleosynthesis is unknown. Collapsars associated with long gamma-ray bursts and hypernovae are potential sites for the production of r-process materials. SN 2020bvc, a Type Ic-BL supernova possibly related to a low-luminosity GRB, is studied to understand the effect of r-process materials on its light curves and photospheric velocities.
ASTROPHYSICAL JOURNAL LETTERS
(2023)