MG14 - Talk detail |
|
Participant |
Johnson, Michael | |||||||
|
Institution |
Harvard-Smithsonian Center for Astrophysics - 60 Garden St. - Cambridge - MA - USA | |||||||
|
Session |
GN1 |
Accepted |
Yes |
Order |
4 |
Time |
15:40 | 15' + 5' |
|
Talk |
Oral abstract |
Title |
Imaging Magnetic Fields Near Black Holes with the Event Horizon Telescope | |||||
| Coauthors | The Event Horizon Telescope Collaboration | |||||||
|
Abstract |
Magnetic fields play central roles in the accretion, emission, and outflow near black holes but have never been directly observed in this region. Yet, because linear polarization of the bright synchrotron emission from galactic cores traces these magnetic fields, polarimetric interferometry with the Event Horizon Telescope (EHT) is capable of imaging these near-horizon fields. I will discuss the capability of the EHT to study turbulence driven by the magnetorotational instability, the role of magnetic fields in jet launching, and signatures of magnetically-dominant regions near supermassive black holes. I will also present observations of the Galactic Center supermassive black hole, Sgr A*, from the 2013 EHT campaign. These observations, the first to resolve the polarized emission from Sgr A* at any wavelength, detect ordered magnetic fields with vigorous activity near the event horizon. |
|||||||
Pdf file |
||||||||