The magnetic field in the dust ring at the center of the Galaxy

R. H. Hildebrand, D. P. Gonatas, S. R. Platt, X. D. Wu, J. A. Davidson, M. W. Werner, G. Novak, M. Morris

Research output: Contribution to journalArticle

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Abstract

Measurements of the polarization of the far-infrared thermal emission from six points in the dust ring at Sgr A are presented. The position angles are approximately perpendicular to the long axis of the ring as projected on the sky. The inferred magnetic field is therefore approximately in the plane of the ring. The pattern traced by the polarization vectors resembles that expected for a magnetic accretion disk. The measurements indicate a field in which the outward radial component is much greater than the axial component at the surface of the disk. The field thus appears to satisfy the condition proposed by Blandford and Payne (1982) for removing energy and angular momentum through centrifugal acceleration of surface material moving along the field lines.
Original languageEnglish
Pages (from-to)114-119
JournalThe Astrophysical Journal
Volume362
DOIs
Publication statusPublished - 1 Oct 1990

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Hildebrand, R. H., Gonatas, D. P., Platt, S. R., Wu, X. D., Davidson, J. A., Werner, M. W., ... Morris, M. (1990). The magnetic field in the dust ring at the center of the Galaxy. The Astrophysical Journal, 362, 114-119. https://doi.org/10.1086/169248
Hildebrand, R. H. ; Gonatas, D. P. ; Platt, S. R. ; Wu, X. D. ; Davidson, J. A. ; Werner, M. W. ; Novak, G. ; Morris, M. / The magnetic field in the dust ring at the center of the Galaxy. In: The Astrophysical Journal. 1990 ; Vol. 362. pp. 114-119.
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Hildebrand, RH, Gonatas, DP, Platt, SR, Wu, XD, Davidson, JA, Werner, MW, Novak, G & Morris, M 1990, 'The magnetic field in the dust ring at the center of the Galaxy' The Astrophysical Journal, vol. 362, pp. 114-119. https://doi.org/10.1086/169248

The magnetic field in the dust ring at the center of the Galaxy. / Hildebrand, R. H.; Gonatas, D. P.; Platt, S. R.; Wu, X. D.; Davidson, J. A.; Werner, M. W.; Novak, G.; Morris, M.

In: The Astrophysical Journal, Vol. 362, 01.10.1990, p. 114-119.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The magnetic field in the dust ring at the center of the Galaxy

AU - Hildebrand, R. H.

AU - Gonatas, D. P.

AU - Platt, S. R.

AU - Wu, X. D.

AU - Davidson, J. A.

AU - Werner, M. W.

AU - Novak, G.

AU - Morris, M.

PY - 1990/10/1

Y1 - 1990/10/1

N2 - Measurements of the polarization of the far-infrared thermal emission from six points in the dust ring at Sgr A are presented. The position angles are approximately perpendicular to the long axis of the ring as projected on the sky. The inferred magnetic field is therefore approximately in the plane of the ring. The pattern traced by the polarization vectors resembles that expected for a magnetic accretion disk. The measurements indicate a field in which the outward radial component is much greater than the axial component at the surface of the disk. The field thus appears to satisfy the condition proposed by Blandford and Payne (1982) for removing energy and angular momentum through centrifugal acceleration of surface material moving along the field lines.

AB - Measurements of the polarization of the far-infrared thermal emission from six points in the dust ring at Sgr A are presented. The position angles are approximately perpendicular to the long axis of the ring as projected on the sky. The inferred magnetic field is therefore approximately in the plane of the ring. The pattern traced by the polarization vectors resembles that expected for a magnetic accretion disk. The measurements indicate a field in which the outward radial component is much greater than the axial component at the surface of the disk. The field thus appears to satisfy the condition proposed by Blandford and Payne (1982) for removing energy and angular momentum through centrifugal acceleration of surface material moving along the field lines.

KW - Accretion Disks

KW - Cosmic Dust

KW - Galactic Nuclei

KW - Interstellar Magnetic Fields

KW - Milky Way Galaxy

KW - Ring Structures

KW - Thermal Emission

KW - Angular Momentum

KW - Far Infrared Radiation

KW - Interstellar Matter

U2 - 10.1086/169248

DO - 10.1086/169248

M3 - Article

VL - 362

SP - 114

EP - 119

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

ER -

Hildebrand RH, Gonatas DP, Platt SR, Wu XD, Davidson JA, Werner MW et al. The magnetic field in the dust ring at the center of the Galaxy. The Astrophysical Journal. 1990 Oct 1;362:114-119. https://doi.org/10.1086/169248