%0 Journal Article %1 citeulike:13853731 %A Johnson, M. D. %A Fish, V. L. %A Doeleman, S. S. %A Marrone, D. P. %A Plambeck, R. L. %A Wardle, J. F. C. %A Akiyama, K. %A Asada, K. %A Beaudoin, C. %A Blackburn, L. %A Blundell, R. %A Bower, G. C. %A Brinkerink, C. %A Broderick, A. E. %A Cappallo, R. %A Chael, A. A. %A Crew, G. B. %A Dexter, J. %A Dexter, M. %A Freund, R. %A Friberg, P. %A Gold, R. %A Gurwell, M. A. %A Ho, P. T. P. %A Honma, M. %A Inoue, M. %A Kosowsky, M. %A Krichbaum, T. P. %A Lamb, J. %A Loeb, A. %A Lu, R. S. %A MacMahon, D. %A McKinney, J. C. %A Moran, J. M. %A Narayan, R. %A Primiani, R. A. %A Psaltis, D. %A Rogers, A. E. E. %A Rosenfeld, K. %A SooHoo, J. %A Tilanus, R. P. J. %A Titus, M. %A Vertatschitsch, L. %A Weintroub, J. %A Wright, M. %A Young, K. H. %A Zensus, J. A. %A Ziurys, L. M. %D 2015 %J Science %K imported %N 6265 %P 1242--1245 %R 10.1126/science.aac7087 %T Resolved magnetic-field structure and variability near the event horizon of Sagittarius A %U http://dx.doi.org/10.1126/science.aac7087 %V 350 %X 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.

@article{citeulike:13853731, 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 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.}}, added-at = {2019-03-25T08:20:55.000+0100}, archiveprefix = {arXiv}, author = {Johnson, M. D. and Fish, V. L. and Doeleman, S. S. and Marrone, D. P. and Plambeck, R. L. and Wardle, J. F. C. and Akiyama, K. and Asada, K. and Beaudoin, C. and Blackburn, L. and Blundell, R. and Bower, G. C. and Brinkerink, C. and Broderick, A. E. and Cappallo, R. and Chael, A. A. and Crew, G. B. and Dexter, J. and Dexter, M. and Freund, R. and Friberg, P. and Gold, R. and Gurwell, M. A. and Ho, P. T. P. and Honma, M. and Inoue, M. and Kosowsky, M. and Krichbaum, T. P. and Lamb, J. and Loeb, A. and Lu, R. S. and MacMahon, D. and McKinney, J. C. and Moran, J. M. and Narayan, R. and Primiani, R. A. and Psaltis, D. and Rogers, A. E. E. and Rosenfeld, K. and SooHoo, J. and Tilanus, R. P. J. and Titus, M. and Vertatschitsch, L. and Weintroub, J. and Wright, M. and Young, K. H. and Zensus, J. A. and Ziurys, L. M.}, biburl = {https://www.bibsonomy.org/bibtex/2ae5d4835fa0b4730a2af9462f72fc51a/ericblackman}, citeulike-article-id = {13853731}, citeulike-linkout-0 = {http://arxiv.org/abs/1512.01220}, citeulike-linkout-1 = {http://arxiv.org/pdf/1512.01220}, citeulike-linkout-2 = {http://dx.doi.org/10.1126/science.aac7087}, day = 03, doi = {10.1126/science.aac7087}, eprint = {1512.01220}, interhash = {0da5018f0a54886c4a17b459cfac850c}, intrahash = {ae5d4835fa0b4730a2af9462f72fc51a}, issn = {0036-8075}, journal = {Science}, keywords = {imported}, month = dec, number = 6265, pages = {1242--1245}, posted-at = {2015-12-05 05:53:05}, priority = {2}, timestamp = {2019-03-25T08:20:55.000+0100}, title = {{Resolved magnetic-field structure and variability near the event horizon of Sagittarius A}}, url = {http://dx.doi.org/10.1126/science.aac7087}, volume = 350, year = 2015 }