Title

CRAFTS for Fast Radio Bursts: Extending the Dispersion-Fluence Relation with New FRBs Detected by FAST

Authors

Chen Hui Niu, National Astronomical Observatories Chinese Academy of Sciences
Di Li, National Astronomical Observatories Chinese Academy of Sciences
Rui Luo, Australia Telescope National Facility
Wei Yang Wang, National Astronomical Observatories Chinese Academy of Sciences
Jumei Yao, National Astronomical Observatories Chinese Academy of Sciences
Bing Zhang, University of Nevada, Las VegasFollow
Wei Wei Zhu, National Astronomical Observatories Chinese Academy of Sciences
Pei Wang, National Astronomical Observatories Chinese Academy of Sciences
Haoyang Ye, Nanjing University
Yong Kun Zhang, University of Chinese Academy of Sciences
Jia Rui Niu, University of Chinese Academy of Sciences
Ning Yu Tang, National Astronomical Observatories Chinese Academy of Sciences
Ran Duan, National Astronomical Observatories Chinese Academy of Sciences
Marko Krco, National Astronomical Observatories Chinese Academy of Sciences
Shi Dai, Australia Telescope National Facility
Yi Feng, University of Chinese Academy of Sciences
Chenchen Miao, University of Chinese Academy of Sciences
Zhichen Pan, National Astronomical Observatories Chinese Academy of Sciences
Lei Qian, National Astronomical Observatories Chinese Academy of Sciences
Mengyao Xue, National Astronomical Observatories Chinese Academy of Sciences
Mao Yuan, University of Chinese Academy of Sciences
Youling Yue, National Astronomical Observatories Chinese Academy of Sciences
Lei Zhang, National Astronomical Observatories Chinese Academy of Sciences
Xinxin Zhang, National Astronomical Observatories Chinese Academy of Sciences

Document Type

Article

Publication Date

3-3-2021

Publication Title

Astrophysical Journal Letters

Volume

909

Issue

1

Abstract

We report three new FRBs discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST), namely FRB 181017.J0036+11, FRB 181118, and FRB 181130, through the Commensal Radio Astronomy FAST Survey (CRAFTS). Together with FRB 181123, which was reported earlier, all four FAST-discovered FRBs share the same characteristics of low fluence (≤0.2 Jy ms) and high dispersion measure (DM, >1000 pc cm-3), consistent with the anticorrelation between DM and fluence of the entire FRB population. FRB 181118 and FRB 181130 exhibit band-limited features. FRB 181130 is prominently scattered (τ s ≃ 8 ms) at 1.25 GHz. FRB 181017.J0036+11 has full-bandwidth emission with a fluence of 0.042 Jy ms, which is one of the faintest FRB sources detected so far. CRAFTS has started to build a new sample of FRBs that fills the region for more distant and fainter FRBs in the fluence-DME diagram, previously out of reach of other surveys. The implied all-sky event rate of FRBs is 1.240-.90+1.94 × 105 sky-1 day-1 at the 95% confidence interval above 0.0146 Jy ms. We also demonstrate here that the probability density function of CRAFTS FRB detections is sensitive to the assumed intrinsic FRB luminosity function and cosmological evolution, which may be further constrained with more discoveries.

Disciplines

Astrophysics and Astronomy

Language

English

UNLV article access

Search your library

Share

COinS