A decade of fast radio bursts

Lorimer, D. R.

doi:10.1038/s41550-018-0607-9

Cited by 40 publications

(37 citation statements)

References 71 publications

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“…The large DMs of observed FRBs well in excess of the Galactic value strongly suggested a cosmological origin [10] as is now known to be the case through the localization of a handful of FRBs to host galaxies [15,18,19,81]. As a crude rule of thumb, the redshift of FRB z ∼ DM/(1000 pc cm −3 ) [2]. Currently, the DMs of the observed FRBs are in the range 100 ∼ 2600 pc cm −3 approximately [11], and hence one can infer their redshifts in the approximate redshift range 0.1 < ∼ z < ∼ 2.6.…”

Section: Introductionmentioning

confidence: 98%

Reconstructing the fraction of baryons in the intergalactic medium with fast radio bursts via Gaussian processes

Qiang

Hao

2020

J. Cosmol. Astropart. Phys.

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Fast radio bursts (FRBs) are a promising new probe for astronomy and cosmology. Thanks to their extragalactic and cosmological origin, FRBs could be used to study the intergalactic medium (IGM) and the cosmic expansion. It is expected that numerous FRBs with identified redshifts will be available in the near future through the identification of their host galaxies or counterparts. DMIGM, the contribution from IGM to the observed dispersion measure (DM) of FRB, carries the key information about IGM and the cosmic expansion history. We can thus study the evolution of the universe by using FRBs with identified redshifts. In the present work, we are interested in the fraction of baryon mass in the IGM, fIGM, which is useful to study the cosmic expansion and the problem of the " missing baryons ". We propose to reconstruct the evolution of fIGM as a function of redshift z with FRBs via a completely model-independent method, namely Gaussian processes. Since there is not a large sample of FRBs with identified redshifts, we use simulated FRBs instead. Through various simulations, we show that this methodology works well.

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Section: Introductionmentioning

confidence: 98%

Reconstructing the fraction of baryons in the intergalactic medium with fast radio bursts via Gaussian processes

Qiang

Hao

2020

J. Cosmol. Astropart. Phys.

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“…The Five-hundred-meter Aperture Spherical radio Telescope (FAST; Nan et al 2011) is the largest telescope in the world (Jiang et al 2019). Due to the FAST's superior sensitivity, Lorimer (2018) and Zhang (2018) predicted that it would be able to detect FRBs of significantly higher dispersion measures (DMs) than those from less-sensitive telescopes. Because high-DM sources are most likely very luminous, FAST surveys could help to constrain the high end of the FRB luminosity function and enable more cosmological applications from FRBs (Zhang 2018).…”

Section: Introductionmentioning

confidence: 99%

A Fast Radio Burst Discovered in FAST Drift Scan Survey

Zhu¹,

Li²,

Luo³

et al. 2020

ApJL

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We report the discovery of a highly dispersed fast radio burst (FRB), FRB181123, from an analysis of ∼1500 hr of drift scan survey data taken using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The pulse has three distinct emission components, which vary with frequency across our 1.0-1.5 GHz observing band. We measure the peak flux density to be >0.065 Jy and the corresponding fluence >0.2 Jy ms. Based on the observed dispersion measure of 1812 cm −3 pc, we infer a redshift of ∼1.9. From this, we estimate the peak luminosity and isotropic energy to be 2×10 43 erg s −1 and 2×10 40 erg, respectively. With only one FRB from the survey detected so far, our constraints on the event rate are limited. We derive a 95% confidence lower limit for the event rate of 900 FRBs per day for FRBs with fluences >0.025 Jy ms. We performed follow-up observations of the source with FAST for four hours and have not found a repeated burst. We discuss the implications of this discovery for our understanding of the physical mechanisms of FRBs.

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“…In the past few years, the newly discovered Fast Radio Bursts (FRBs) have become a promising field in astronomy and cosmology, which is currently thriving and growing rapidly [1][2][3][4][5][6][7]. In fact, since its first discovery [8], more and more evidences suggest that FRBs are at cosmological distances (see e.g.…”

Section: Introductionmentioning

confidence: 99%

“…As a very crude rule of thumb, the redshift z ∼ DM/(1000 pc · cm −3 ) [2]. For all the 80 observed FRBs to date, their DMs are in the range 100 ∼ 2600 pc · cm −3 approximately [19], and hence one can infer redshifts in the range 0.1 < ∼ z < ∼ 2.6 crudely.…”

Section: Introductionmentioning

confidence: 99%

Cosmic anisotropy and fast radio bursts

Qiang

Deng

Hao

2020

Class. Quantum Grav.

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In the recent years, the field of Fast Radio Bursts (FRBs) is thriving and growing rapidly. It is of interest to study cosmology by using FRBs with known redshifts. In the present work, we try to test the possible cosmic anisotropy with the simulated FRBs. We find that at least 2800, 190, 100 FRBs are competent to find the cosmic anisotropy with a dipole amplitude 0.01, 0.03, 0.05, respectively. Unfortunately, even 10000 FRBs are not competent to find the tiny cosmic anisotropy with a dipole amplitude of O(10 −3 ). On the other hand, at least 20 FRBs with known redshifts are competent to find the cosmic anisotropy with a dipole amplitude 0.1. We expect that such a big cosmic anisotropy can be ruled out by using only a few tens of FRBs with known redshifts in the near future.PACS numbers: 98.80.Es, 95.36.+x, 98.70.Dk

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A decade of fast radio bursts

Cited by 40 publications

References 71 publications

Reconstructing the fraction of baryons in the intergalactic medium with fast radio bursts via Gaussian processes

Reconstructing the fraction of baryons in the intergalactic medium with fast radio bursts via Gaussian processes

A Fast Radio Burst Discovered in FAST Drift Scan Survey

Cosmic anisotropy and fast radio bursts

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