Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session R15: Gravitational Waves and Strong-field Dynamics
1:30 PM–3:18 PM,
Monday, April 15, 2019
Sheraton
Room: Plaza Court 4
Sponsoring
Unit:
DGRAV
Chair: Kent Yagi, University of Virginia
Abstract: R15.00006 : Polarization Whorls from High-Spin Black Holes*
2:30 PM–2:42 PM
View Presentation Abstract
Presenter:
Delilah E Gates
(Harvard University)
Authors:
Delilah E Gates
(Harvard University)
Daniel Kapec
(Institute for Advanced Study)
Alexandru Lupsasca
(Harvard University, Harvard University)
Yichen Shi
(Harvard University)
Andrew Eben Strominger
(Harvard University)
of the supermassive black holes at the centers of our galaxy and the neighboring galaxy M87.
The black hole of M87 is believed to be very rapidly spinning, within 2% of extremality. General
relativity predicts that a high-spin black hole has an emergent conformal symmetry near its
event horizon. We will show this symmetry to analytically predict the polarized near-horizon
emissions of high-spin back holes and find a distinctive pattern of whorls aligned with the spin.
*This work was supported in part by NSF grant 1205550, NSF GRFP grant DGE1144152, and DOE grant DE-SC0009988.
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