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The low density and magnetization of a massive galaxy halo exposed by a fast radio burst
- Publication Year :
- 2019
- Publisher :
- arXiv, 2019.
-
Abstract
- Present-day galaxies are surrounded by cool and enriched halo gas extending to 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) with arcsecond precision, which passes through the halo of a foreground galaxy. Analysis of the burst shows 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.<br />Comment: Published in Science on 2019 September 26; Main (3 figures; 1 Table) + Supp (12 figures; 7 Tables)
- Subjects :
- Physics
Supermassive black hole
Multidisciplinary
Fast radio burst
Turbulence
Star formation
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics - Astrophysics of Galaxies
01 natural sciences
Galaxy
Galactic halo
Magnetization
Astrophysics of Galaxies (astro-ph.GA)
0103 physical sciences
Halo
010306 general physics
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....8b24d71f5d7fa5423cbf94920978f8c4
- Full Text :
- https://doi.org/10.48550/arxiv.1909.11681