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Title: Universal interferometric signatures of a black hole’s photon ring

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [2];  [2]; ORCiD logo [3];  [2]; ORCiD logo [4];  [1]; ORCiD logo [5]; ORCiD logo [6];  [2];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [7]; ORCiD logo [1]
  1. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  2. Harvard Univ., Cambridge, MA (United States)
  3. Univ. of Illinois at Urbana-Champaign, IL (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Institute for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
  5. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Princeton Univ., NJ (United States)
  6. Univ. of Illinois at Urbana-Champaign, IL (United States)
  7. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Univ. of Massachusetts, Boston, MA (United States)

The Event Horizon Telescope image of the supermassive black hole in the galaxy M87 is dominated by a bright, unresolved ring. General relativity predicts that embedded within this image lies a thin “photon ring,” which is composed of an infinite sequence of self-similar subrings that are indexed by the number of photon orbits around the black hole. The subrings approach the edge of the black hole “shadow,” becoming exponentially narrower but weaker with increasing orbit number, with seemingly negligible contributions from high-order subrings. Here, we show that these subrings produce strong and universal signatures on long interferometric baselines. These signatures offer the possibility of precise measurements of black hole mass and spin, as well as tests of general relativity, using only a sparse interferometric array.

Research Organization:
Institute for Advanced Study, Princeton, NJ (United States); Harvard Univ., Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); Gordon and Betty Moore Foundation; National Aeronautics and Space Administration (NASA); Harvard University; John Templeton Foundation
Grant/Contract Number:
SC0009988; SC0007870; AST-1440254; AST-1716536; AST-1716327; OISE-1743747; PHY-1205550; GBMF-5278; HST-HF2-51431.001-A; 60477
OSTI ID:
1631981
Alternate ID(s):
OSTI ID: 1626057
Journal Information:
Science Advances, Vol. 6, Issue 12; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 144 works
Citation information provided by
Web of Science

References (33)

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First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole journal April 2019
The Structure and Dynamics of the Subparsec Jet in M87 Based on 50 VLBA Observations over 17 Years at 43 GHz journal March 2018
VLBI observations of weak sources using fast frequency switching journal March 2005
First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole journal April 2019
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journal May 2011
Quasinormal-mode spectrum of Kerr black holes and its geometric interpretation journal November 2012
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Testing General Relativity with the Black Hole Shadow Size and Asymmetry of Sagittarius A*: Limitations from Interstellar Scattering journal December 2018
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Localizing Sagittarius a* and m87 on Microarcsecond Scales with Millimeter very long Baseline Interferometry journal June 2011
Two-temperature, Magnetically Arrested Disc simulations of the jet from the supermassive black hole in M87 journal April 2019
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Black hole shadows, photon rings, and lensing rings journal July 2019
First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring journal April 2019
High-Precision Astrometric Millimeter very long Baseline Interferometry Using a new Method for Atmospheric Calibration journal March 2011
Particle motion near high-spin black holes journal December 2019
Adapting a Cryogenic Sapphire Oscillator for Very Long Baseline Interferometry text January 2011
Kinematics of the jet in M87 on scales of 100 -- 1000 Schwarzschild radii text January 2016
Two-temperature, Magnetically Arrested Disc simulations of the jet from the supermassive black hole in M87 text January 2018
Black Hole Shadows, Photon Rings, and Lensing Rings text January 2019

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