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Article
Astronomy & Astrophysics
Shivani Bhandari et al.
Summary: This study presents the localization and host galaxies of one repeating and two apparently nonrepeating fast radio bursts (FRBs). The results show that there are no significant differences in the host properties of repeating and apparently nonrepeating FRBs. The host galaxies of FRBs are moderately star forming and have global properties similar to core-collapse supernovae and short gamma-ray bursts hosts.
ASTRONOMICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
T. Cassanelli et al.
Summary: The Canadian Hydrogen Intensity Mapping Experiment (CHIME)/FRB experiment has successfully detected fast radio bursts (FRBs) with the help of its sensitivity and wide field of view, but its low resolution hinders accurate localization to host galaxies. Very long baseline interferometry (VLBI) can provide a solution to this localization challenge for non-repeating events. By refurbishing a 10 m radio dish at the Algonquin Radio Observatory in Canada, a testbed for VLBI experiments with a resolution of approximately 30 mas has been developed. The system's performance and localization procedure have been validated using single pulses from the Crab pulsar, and the project has successfully detected a non-repeating FRB simultaneously observed in both the CHIME and the Algonquin 10 m telescope.
ASTRONOMICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
J. Mena-Parra et al.
Summary: This paper presents a clock stabilization system that transfers the reference clock of the CHIME digital backend from a GPS-disciplined ovenized crystal oscillator to a passive hydrogen maser. By combining the stability of the GPS clock with the maser, it reduces clock timing errors for VLBI calibration observations. The system is validated and meets the stability requirements for CHIME/FRB Outriggers.
ASTRONOMICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Rachel C. Zhang et al.
Summary: The association between the redshift distribution of fast radio bursts (FRBs) and the star formation history of the universe is not well understood. The recent discovery of FRB 20200120E in a globular cluster raises doubts about this assumption. By analyzing the data from the first CHIME FRB catalog, researchers find that the hypothesis that all FRBs track the star formation history is unlikely, and a model considering significant delay or a hybrid model is more compatible with the data.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
Da-Chun Qiang et al.
Summary: The origin of fast radio bursts (FRBs) is still unknown, making it an active field of research. The recently released CHIME/FRB catalog provides a valuable sample for testing FRB distribution models. It was found that the FRB distribution model tracking the cosmic star formation history (SFH) is rejected, while other models with suitable parameters are consistent with the observational data. These results shed light on the origin of FRBs and their cosmology.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Nayab Gohar et al.
Summary: This study investigates the effects of the interstellar medium and the distribution of magnetars in the Milky Way on the detection of fast radio bursts (FRBs). The scattering effects of the interstellar medium are found to be the main reason for the detectability of FRB events. A proposed all-sky radio detector is suggested to increase the detection rate of Milky Way FRBs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Tetsuya Hashimoto et al.
Summary: The energy functions of non-repeating fast radio bursts (FRBs) show Schechter function-like shapes at redshifts less than or similar to 1. The energy functions and volumetric rates of non-repeating FRBs decrease towards higher redshifts, suggesting that the event rate of non-repeating FRBs is likely controlled by old populations rather than young populations traced by the cosmic star-formation rate density.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Bo Han Chen et al.
Summary: This work utilizes unsupervised machine learning to classify repeating and non-repeating fast radio bursts (FRBs) and demonstrates the efficiency of the UMAP classification method in identifying repeating FRBs. Application of this method on the CHIME/FRB database reveals successful identification of 188 FRB repeater source candidates.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
C. W. James et al.
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)
Review
Astronomy & Astrophysics
E. Petroff et al.
Summary: Since the discovery of the first fast radio burst (FRB) in 2007, the study of FRBs has expanded rapidly. Recent observations have provided a wealth of information about FRBs, including their abundance, repeaters, host galaxies, and source activity. Surprising discoveries, such as the connection between FRBs and magnetars and the localization of FRBs to specific clusters, have also been made.
ASTRONOMY AND ASTROPHYSICS REVIEW
(2022)
Article
Astronomy & Astrophysics
Adam E. Lanman et al.
Summary: This paper reports on the bursts detected by CHIME/FRB from the repeating FRB 20201124A, including their morphologies, fluences, and arrival times. The observations show a significant change in the event rate before and after discovery. Through maximum-likelihood estimation, we find a best-fit index for a power-law luminosity function that is consistent with other repeating FRBs.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
P. Chawla et al.
Summary: We present a Monte Carlo-based population synthesis study on fast radio burst (FRB) dispersion and scattering. By comparing simulated distributions with the CHIME/FRB catalog, we show that the interstellar medium alone cannot explain the observed scattering timescales. We introduce additional sources of scattering and find that a population of FRBs with scattering from these sources is marginally consistent with the catalog.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
K. Nimmo et al.
Summary: VLBI localization of FRB 20201124A places it near the optical center of the host galaxy, consistent with the recently discovered extended radio structure associated with star formation. The study suggests that subarcsecond precision can be achieved using single-burst data sets.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Multidisciplinary Sciences
F. Kirsten et al.
Summary: The fast radio burst FRB 20200120E is reported to originate from a globular cluster in the galaxy M81, which challenges previous models that invoke young magnetars as the source of FRBs. Instead, it is proposed that FRB 20200120E may come from a highly magnetized neutron star formed through the collapse of a white dwarf or the merger of compact stars in a binary system.
Article
Astronomy & Astrophysics
Mandana Amiri et al.
Summary: The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a drift scan radio telescope designed to map neutral hydrogen and constrain the expansion history of the universe. CHIME consists of four parallel cylindrical reflectors and a 256-element dual-polarization linear feed array. It utilizes an FX correlator to digitize and correlate signals, generating different correlation products for various purposes. The instrument's performance has been evaluated based on three years of science data, and progress has been made in characterizing CHIME's primary beam response.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2022)
Article
Astronomy & Astrophysics
Han-Yue Guo et al.
Summary: Fast radio bursts (FRBs) are a topic of active research in the fields of astronomy and cosmology, but their origin remains unknown. This study proposes a subclassification scheme for FRBs and explores the physical mechanisms behind different subclasses, aiming to improve our understanding and application of FRBs in astronomy and cosmology.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Multidisciplinary Sciences
C-H Niu et al.
Summary: The dispersive sweep of fast radio burstsreveals the ionized baryon content of intergalactic medium. The detection and localization of repeating FRB 20190520B with a persistent radio source co-located suggests caution in inferring redshifts for FRBs without accurate host-galaxy identifications.
Article
Astronomy & Astrophysics
Calvin Leung et al.
Summary: Fast radio bursts (FRBs) are an exciting frontier in gravitational lensing research due to their brightness, extragalactic nature, and the coherent characteristics of their emission. In this study, a novel interferometric method is used to search for gravitationally lensed FRBs by analyzing bursts detected by CHIME/FRB. The researchers found that coherent FRB lensing is a sensitive probe of sub-solar mass compact objects and placed novel constraints on the abundance of primordial black holes (PBHs) outside the Local Group. Their observations lead to the constraint that the fraction of dark matter made of compact objects, such as PBHs, is f less than or similar to 0.8, if their masses are similar to 10(-3) solar masses.
Article
Astronomy & Astrophysics
Zarif Kader et al.
Summary: Researchers searched for repeated electric field waveforms from compact objects using a novel dechannelization algorithm and matched filtering technique. After analyzing data from 172 fast radio bursts, no significant gravitational lensing signals were detected.
Article
Astronomy & Astrophysics
D. W. Gardenier et al.
Summary: The study on FRB population synthesis reveals that the division between one-off and repeating FRB sources in terms of dispersion measure and distance distribution may be influenced by selection effects and low activity.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Masoud Rafiei-Ravandi et al.
Summary: The CHIME/FRB Project has released its first catalog of fast radio bursts (FRBs), which shows a statistically significant cross-correlation between CHIME FRBs and galaxies in the redshift range 0.3 ≤ z ≤ 0.5 in three photometric galaxy surveys: WISE x SCOS, DESI-BGS, and DESI-LRG. The results suggest that a fraction of CHIME FRBs may be located in the same dark matter halos as survey galaxies in this redshift range. Evidence is also found for a population of FRBs with large host dispersion measure, potentially related to gas in large halos.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Ziggy Pleunis et al.
Summary: This study presents a synthesis of fast radio burst (FRB) morphology detected in the 400-800 MHz frequency range by the CHIME/FRB project, identifying four observed archetypes of burst morphology and discussing the implications of these differences for using FRBs as astrophysical tools. The researchers confirm that bursts from repeating sources have larger widths on average and are narrower in bandwidth, potentially due to beaming or propagation effects.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Mandana Amiri et al.
Summary: This study presents a catalog of 536 fast radio bursts detected by the CHIME/FRB Project over a one-year period, providing insights into the FRB population. The research shows consistency in sky locations and dispersion measures between repeaters and apparent nonrepeaters, while also highlighting differences in intrinsic temporal width and spectral bandwidth. Additionally, the study reveals the population properties of FRBs and conducts an absolute calibration of selection effects.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2021)
Article
Astronomy & Astrophysics
F. Kirsten et al.
Summary: Fast radio bursts are bright radio signals emitted from extragalactic sources, with recent detections suggesting they may be emitted by magnetars at cosmological distances. Observations of multiple bursts from Galactic magnetar SGR 1935+2154 show a wide range in energy levels, raising questions about the underlying physical processes and the distribution of fast radio bursts at very low energies.
Article
Astronomy & Astrophysics
Chen-Hui Niu et al.
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
Multidisciplinary Sciences
D. Li et al.
Summary: The observation of FRB 121102 reveals a bimodal burst rate energy distribution, the absence of detectable periodicity or quasi-periodicity, challenging models involving a single rotating compact object.
Article
Astronomy & Astrophysics
M. Bhardwaj et al.
Summary: We report the discovery of FRB 20200120E, a repeating fast radio burst with a low dispersion measure, detected by the Canadian Hydrogen Intensity Mapping Experiment FRB project. The FRB is located near the spiral galaxy M81 at a distance of 3.6 Mpc. Several cataloged M81 sources and a radio point source have been found within the localization region of the FRB.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Review
Astronomy & Astrophysics
Manisha Caleb et al.
Summary: Fast radio bursts (FRBs) have been a subject of excitement and controversy since their discovery in 2007, with various theories proposed for their origin. Recent observations of FRB-like pulses from Galactic magnetars have led to magnetar engine models emerging as the leading theory in understanding these mysterious phenomena. Overall, FRB pulses offer unique characteristics for probing magnetic field strengths, interstellar media inhomogeneities, and plasma turbulence, making them important tools for studying the Universe.
Article
Astronomy & Astrophysics
Alexandra G. Mannings et al.
Summary: Observations of eight fast radio burst host galaxies with the Hubble Space Telescope show that they are typically located in fainter regions of their host galaxies but overall follow a certain pattern, distinct from other transient populations with known progenitors. Most of the FRBs are not in regions of elevated star formation rates or stellar mass surface densities. Additionally, five out of eight FRB hosts exhibit clear spiral arm features.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Kyle Kremer et al.
Summary: Researchers used N-body simulations to explore various mechanisms for the formation of young neutron stars (NSs) in globular clusters (GCs), further elucidating the origin and emission mechanisms of fast radio bursts (FRBs). The results suggest that both magnetically powered and rotation-powered sources could potentially produce FRBs, and recycled millisecond pulsars or low-mass X-ray binaries are also plausible channels for FRB production, depending on their duty cycles.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Astronomy & Astrophysics
Shriharsh P. Tendulkar et al.
Summary: FRB 20180916B, located in the host galaxy SDSS J015800.28+654253.0 at 149 Mpc, is the closest-known FRB with a robust host galaxy association. The source shows a distinct bursting period and possible stellar companions are suggested to be of a cooler and less massive spectral type than O6V.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Astronomy & Astrophysics
Calvin Leung et al.
Summary: The study demonstrates the blind interferometric detection and localization of two fast radio bursts (FRBs) between CHIME and CHIME Pathfinder with high precision. Through synchronization of telescopes and offline data processing, the experiment successfully addresses the challenges of high data rate, precise triggering, and calibration under high-sensitivity requirements.
ASTRONOMICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Xiang-Han Cui et al.
Summary: The study demonstrates that repeating and non-repeating FRBs exhibit statistical differences, suggesting different origins. By using pulse width and radio luminosity as statistical variables, it is possible to infer that the two classes of FRBs have distinct origins.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Shunke Ai et al.
Summary: The study investigates the evolutionary trend of repeater fraction in different types of FRBs over time through Monte Carlo simulations, predicting the impact of future observations on this fraction.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
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Multidisciplinary Sciences
B. Marcote et al.
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