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

41 Citations (Scopus)

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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