| Literature DB >> 26785487 |
Michael D Johnson1, Vincent L Fish2, Sheperd S Doeleman3, Daniel P Marrone4, Richard L Plambeck5, John F C Wardle6, Kazunori Akiyama7, Keiichi Asada8, Christopher Beaudoin2, Lindy Blackburn9, Ray Blundell9, Geoffrey C Bower10, Christiaan Brinkerink11, Avery E Broderick12, Roger Cappallo2, Andrew A Chael9, Geoffrey B Crew2, Jason Dexter13, Matt Dexter5, Robert Freund4, Per Friberg14, Roman Gold15, Mark A Gurwell9, Paul T P Ho8, Mareki Honma16, Makoto Inoue8, Michael Kosowsky17, Thomas P Krichbaum18, James Lamb19, Abraham Loeb9, Ru-Sen Lu20, David MacMahon5, Jonathan C McKinney15, James M Moran9, Ramesh Narayan9, Rurik A Primiani9, Dimitrios Psaltis4, Alan E E Rogers2, Katherine Rosenfeld9, Jason SooHoo2, Remo P J Tilanus21, Michael Titus2, Laura Vertatschitsch9, Jonathan Weintroub9, Melvyn Wright5, Ken H Young9, J Anton Zensus18, Lucy M Ziurys4.
Abstract
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 magnetic fields near the event horizon, on scales of ~6 Schwarzschild radii, and we have detected and localized the intrahour variability associated with these fields.Year: 2015 PMID： 26785487 DOI： 10.1126/science.aac7087
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728