The low density and magnetization of a massive galaxy halo exposed by a fast radio burst

被引：253

作者：

Prochaska, J. Xavier ^{[1
,2
]}

Macquart, Jean-Pierre ^{[3
]}

McQuinn, Matthew ^{[4
]}

Simha, Sunil ^{[1
]}

Shannon, Ryan M. ^{[5
]}

Day, Cherie K. ^{[5
,6
]}

Marnoch, Lachlan ^{[6
,7
]}

Ryder, Stuart ^{[7
]}

Deller, Adam ^{[5
]}

Bannister, Keith W. ^{[6
]}

Bhandari, Shivani ^{[6
]}

Bordoloi, Rongmon ^{[8
]}

Bunton, John ^{[6
]}

Cho, Hyerin ^{[9
]}

Flynn, Chris ^{[5
]}

Mahony, Elizabeth K. ^{[6
]}

Phillips, Chris ^{[6
]}

Qiu, Hao ^{[10
]}

Tejos, Nicolas ^{[11
]}

机构：

[1] Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA

[2] Kavli Inst Phys & Math Universe, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778583, Japan

[3] Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia

[4] Univ Washington, Dept Astron, Seattle, WA 98195 USA

[5] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[6] Australia Telescope Natl Facil, Commonwealth Sci & Ind Res Org, POB 76, Epping, NSW 1710, Australia

[7] Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia

[8] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

[9] Gwangju Inst Sci & Technol, Sch Phys & Chem, Gwangju 61005, South Korea

[10] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia

[11] Pontificia Univ Catolica Valparaiso, Inst Fis, Valparaiso 4059, Chile

来源：

SCIENCE | 2019年 / 366卷 / 6462期

基金：

澳大利亚研究理事会; 美国国家科学基金会;

关键词：

CIRCUMGALACTIC MEDIUM; HOST GALAXY; TURBULENCE; IMPACT; CONSTRAINTS; INSTABILITY; EFFICIENT; EMISSION; SOFTWARE; REDSHIFT;

D O I：

10.1126/science.aay0073

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Present-day galaxies are surrounded by cool and enriched halo gas extending for hundreds of kiloparsecs. This halo gas is thought to be the dominant reservoir of material available to fuel future star formation, but direct constraints on its mass and physical properties have been difficult to obtain. We report the detection of a fast radio burst (FRB 181112), localized with arcsecond precision, that passes through the halo of a foreground galaxy. Analysis of the burst shows that the halo gas has low net magnetization and turbulence. Our results imply predominantly diffuse gas in massive galactic halos, even those hosting active supermassive black holes, contrary to some previous results.

引用

页码：231 / +

页数：60

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