Submillimetre observations of the two-component magnetic field in M82-Reference-Cited by-同舟云学术

Submillimetre observations of the two-component magnetic field in M82

Published:2021-05-13 Issue:1 Volume:505 Page:684-688
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Pattle Kate¹^ORCID,Gear Walter¹^ORCID,Redman Matt¹^ORCID,Smith Matthew W L²^ORCID,Greaves Jane²^ORCID

Affiliation:

1. Centre for Astronomy, Department of Physics, National University of Ireland Galway, University Road, Galway H91 TK33, Ireland

2. School of Physics and Astronomy, Cardiff University, The Parade, Cardiff CF24 3AA, UK

Abstract

ABSTRACT We observed the starburst galaxy M82 in 850 µm polarized light with the POL-2 polarimeter on the James Clerk Maxwell Telescope (JCMT). We interpret our observed polarization geometry as tracing a two-component magnetic field: a poloidal component aligned with the galactic ‘superwind’, extending to a height ∼350 pc above and below the central bar; and a spiral-arm-aligned, or possibly toroidal, component in the plane of the galaxy, which dominates the 850 µm polarized light distribution at galactocentric radii ≳2 kpc. Comparison of our results with recent High-resolution Airborne Wideband Camera Plus (HAWC+) measurements of the field in the dust entrained by the M82 superwind suggests that the superwind breaks out from the central starburst at ∼350 pc above the plane of the galaxy.

Funder

National Astronomical Observatory of Japan

Academia Sinica

Korea Astronomy and Space Science Institute

National Key Research and Development Program of China

Science and Technology Facilities Council

Canada Foundation for Innovation

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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