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Resolved Magnetic-Field Structure and Variability Near the Event Horizon of Sagittarius A*

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arxiv 1512.01220 v1 pith:G5PYXLOB submitted 2015-12-03 astro-ph.HE astro-ph.GAastro-ph.IM

Michael D. Johnson , Vincent L. Fish , Sheperd S. Doeleman , Daniel P. Marrone , Richard L. Plambeck , John F. C. Wardle , Kazunori Akiyama , Keiichi Asada
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Christopher Beaudoin Lindy Blackburn Ray Blundell Geoffrey C. Bower Christiaan Brinkerink Avery E. Broderick Roger Cappallo Andrew A. Chael Geoffrey B. Crew Jason Dexter Matt Dexter Robert Freund Per Friberg Roman Gold Mark A. Gurwell Paul T. P. Ho Mareki Honma Makoto Inoue Michael Kosowsky Thomas P. Krichbaum James Lamb Abraham Loeb Ru-Sen Lu David MacMahon Jonathan C. McKinney James M. Moran Ramesh Narayan Rurik A. Primiani Dimitrios Psaltis Alan E. E. Rogers Katherine Rosenfeld Jason SooHoo Remo P. J. Tilanus Michael Titus Laura Vertatschitsch Jonathan Weintroub Melvyn Wright Ken H. Young J. Anton Zensus Lucy M. Ziurys
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classification astro-ph.HEastro-ph.GAastro-ph.IM
keywords fieldsnearaccretionblackemissioneventholehorizon
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Near a black hole, differential rotation of a magnetized accretion disk is thought to produce an instability that amplifies weak magnetic fields, driving accretion and outflow. These magnetic fields would naturally give rise to the observed synchrotron emission in galaxy cores and to the formation of relativistic jets, but no observations to date have been able to resolve the expected horizon-scale magnetic-field structure. We report interferometric observations at 1.3-millimeter wavelength that spatially resolve the linearly polarized emission from the Galactic Center supermassive black hole, Sagittarius A*. We have found evidence for partially ordered fields near the event horizon, on scales of ~6 Schwarzschild radii, and we have detected and localized the intra-hour variability associated with these fields.

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Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Dynamics and geometry of the inner sub-parsec-scale jet in 3C 279 observed with the Event Horizon Telescope

    astro-ph.GA 2026-07 conditional novelty 5.0 of 10

    EHT 2021 images of 3C 279 reveal an intrinsic, sideways-elongated jet base whose components move at apparent speeds up to 10c, implying a sub-parsec bend toward the observer and viewing angles below one degree.

  2. Influence of the Vacuum Polarization Effect on the Motion of Charged Particles in the Magnetic Field around a Schwarzschild Black Hole

    gr-qc 2019-08 reject novelty 5.0 of 10

    If vacuum polarization non-minimally couples magnetic fields to gravity, charged particle trajectories around Schwarzschild black holes can shift from unbound to bound, especially near the horizon.

  3. Chaotic behaviors of particles around the black hole with an anisotropic matter immersed in a magnetic field

    gr-qc 2026-07 unverdicted novelty 4.0 of 10

    Exact black hole solution with anisotropic matter and magnetic field shows the matter parameter reduces local chaos (Lyapunov exponent) while the magnetic field drives qualitative shifts in global chaos (Poincaré sections).

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