A Nearby Repeating Fast Radio Burst in the Direction of M81

被引：170

作者：

Bhardwaj, M. ^{[1
,2
]}

Gaensler, B. M. ^{[3
,4
]}

Kaspi, V. M. ^{[1
,2
]}

Landecker, T. L. ^{[5
]}

Mckinven, R. ^{[3
,4
]}

Michilli, D. ^{[1
,2
]}

Pleunis, Z. ^{[1
,2
]}

Tendulkar, S. P. ^{[6
,7
]}

Andersen, B. C. ^{[1
,2
]}

Boyle, P. J. ^{[1
,2
]}

Cassanelli, T. ^{[3
,4
]}

Chawla, P. ^{[1
,2
]}

Cook, A. ^{[3
,4
]}

Dobbs, M. ^{[1
,2
]}

Fonseca, E. ^{[1
,2
,8
,9
]}

Kaczmarek, J. ^{[5
]}

Leung, C. ^{[10
,11
]}

Masui, K. ^{[10
,11
]}

Mnchmeyer, M. ^{[12
]}

Ng, C. ^{[3
]}

Rafiei-Ravandi, M. ^{[12
,13
]}

Scholz, P. ^{[3
]}

Shin, K. ^{[10
,11
]}

Smith, K. M. ^{[12
]}

Stairs, I. H. ^{[14
]}

Zwaniga, A. V. ^{[1
,2
]}

机构：

[1] McGill Univ, Dept Phys, 3600 Rue Univ, Montreal, PQ H3A 2T8, Canada

[2] McGill Univ, McGill Space Inst, 3550 Rue Univ, Montreal, PQ H3A 2A7, Canada

[3] Univ Toronto, Dunlap Inst Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada

[4] Univ Toronto, David A Dunlap Dept Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada

[5] Natl Res Council Canada, Herzberg Astron & Astrophys Res Ctr, Domin Radio Astrophys Observ, POB 248, Penticton, BC V2A 6J9, Canada

[6] Tata Inst Fundamental Res, Dept Astron & Astrophys, Mumbai 400005, Maharashtra, India

[7] Natl Ctr Radio Astrophys, Post Bag 3, Pune 411007, Maharashtra, India

[8] West Virginia Univ, Dept Phys & Astron, POB 6315, Morgantown, WV 26506 USA

[9] West Virginia Univ, Ctr Gravitat Waves & Cosmol, Chestnut Ridge Res Bldg, Morgantown, WV 26505 USA

[10] MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[11] MIT, Dept Phys, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[12] Perimeter Inst Theoret Phys, 31 Caroline St N, Waterloo, ON N2L 2Y5, Canada

[13] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

[14] Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2021年 / 910卷 / 02期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会; 加拿大创新基金会;

关键词：

Radio transient sources; Radio bursts; Transient sources; Radio pulsars;

D O I：

10.3847/2041-8213/abeaa6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the discovery of FRB 20200120E, a repeating fast radio burst (FRB) with a low dispersion measure (DM) detected by the Canadian Hydrogen Intensity Mapping Experiment FRB project. The source DM of 87.82 pc cm(-3) is the lowest recorded from an FRB to date, yet it is significantly higher than the maximum expected from the Milky Way interstellar medium in this direction (similar to 50 pc cm(-3)). We have detected three bursts and one candidate burst from the source over the period 2020 January-November. The baseband voltage data for the event on 2020 January 20 enabled a sky localization of the source to within 14 arcmin(2) (90% confidence). The FRB localization is close to M81, a spiral galaxy at a distance of 3.6 Mpc. The FRB appears on the outskirts of M81 (projected offset similar to 20 kpc) but well inside its extended H i and thick disks. We empirically estimate the probability of a chance coincidence with M81 to be <10(-2). However, we cannot reject a Milky Way halo origin for the FRB. Within the FRB localization region, we find several interesting cataloged M81 sources and a radio point source detected in the Very Large Array Sky Survey. We search for prompt X-ray counterparts in Swift Burst Alert Telescope and Fermi/GBM data, and, for two of the FRB 20200120E bursts, we rule out coincident SGR 1806-20-like X-ray bursts. Due to the proximity of FRB 20200120E, future follow-up for prompt multiwavelength counterparts and subarcsecond localization could be constraining of proposed FRB models.

引用

页数：14