Fetching the paper…

Reading the bibliography…

2020

On the Observable Shape of Black Hole Photon Rings

Gralla, Samuel E., Lupsasca, Alexandru

Original
PDF
Post on X

Understand

Motivated by the prospect of measuring a black hole photon ring, in previous work we explored the interferometric signature produced by a bright, narrow curve in the sky.

Interferometric observations of such a curve measure its "projected position function" $\mathbf{r}\cdot\hat{\mathbf{n}}$, where $\mathbf{r}$ parameterizes the curve and $\hat{\mathbf{n}}$ denotes its unit normal vector.
In this paper, we show by explicit construction that a curve can be fully reconstructed from its projected position, completing the argument that space interferometry can in principle determine the detailed photon ring shape.
In practice, near-term observations may be limited to the visibility amplitude alone, which contains incomplete shape information: for convex curves, the amplitude only encodes the set of projected diameters (or "widths") of the shape.

On the Observable Shape of Black Hole Photon Rings · Around

Built on

S. E. Gralla, D. E. Holz, and R. M. Wald, “Black hole shadows, photon rings, and lensing rings,” Phys. Rev. D 100
Original
1906
Earlier work this paper cites.
Event Horizon Telescope Collaboration, K. Akiyama, A. Alberdi, W. Alef, K. Asada, R. Azulay, A.-K. Baczko, D. Ball, M. Baloković, and J. Barrett, “First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole,” ApJ 875
Original
1906
Earlier work this paper cites.
Event Horizon Telescope Collaboration, K. Akiyama, A. Alberdi, W. Alef, K. Asada, R. Azulay, A.-K. Baczko, D. Ball, M. Baloković, and J. Barrett, “First M87 Event Horizon Telescope Results. II. Array and Instrumentation,” ApJ 875
Original
1906
Earlier work this paper cites.
Event Horizon Telescope Collaboration, K. Akiyama, A. Alberdi, W. Alef, K. Asada, R. Azulay, A.-K. Baczko, D. Ball, M. Baloković, and J. Barrett, “First M87 Event Horizon Telescope Results. III. Data Processing and Calibration,” ApJ 875
Original
1906
Earlier work this paper cites.
Event Horizon Telescope Collaboration, K. Akiyama, A. Alberdi, W. Alef, K. Asada, R. Azulay, A.-K. Baczko, D. Ball, M. Baloković, and J. Barrett, “First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole,” ApJ 875
Original
1906
Earlier work this paper cites.
Event Horizon Telescope Collaboration, K. Akiyama, A. Alberdi, W. Alef, K. Asada, R. Azulay, A.-K. Baczko, D. Ball, M. Baloković, and J. Barrett, “First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring,” ApJ 875
Original
1906
Earlier work this paper cites.
Event Horizon Telescope Collaboration, K. Akiyama, A. Alberdi, W. Alef, K. Asada, R. Azulay, A.-K. Baczko, D. Ball, M. Baloković, and J. Barrett, “First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole,” ApJ 875
Original
1906
Earlier work this paper cites.

Similar

M. D. Johnson, A. Lupsasca, A. Strominger, G. N. Wong, S. Hadar, D. Kapec, R. Narayan, A. Chael, C. F. Gammie, P. Galison, D. C. M. Palumbo, S. S. Doeleman, L. Blackburn, M. Wielgus, D. W. Pesce, J. R. Farah, and J. M. Moran, “Universal interferometric signatures of a black hole’s photon ring,” Science Advances
Original
1907
Cited alongside, same era.
S. E. Gralla and A. Lupsasca, “Lensing by Kerr black holes,” Phys. Rev. D 101
Original
1910
Cited alongside, same era.
S. E. Gralla and A. Lupsasca, “Null geodesics of the Kerr exterior,” Phys. Rev. D 101
Original
1910
Cited alongside, same era.
L. C. Stein and N. Warburton, “Location of the last stable orbit in Kerr spacetime,” Phys. Rev. D 101
Original
1912
Cited alongside, same era.
Jan., 1973
J. M. Bardeen, “Timelike and null geodesics in the Kerr metric.,” in Black Holes (Les Astres Occlus) · 1973

Then

K. Beckwith and C. Done, “Extreme gravitational lensing near rotating black holes,” MNRAS 359
2005
Later among the works it cites.
S. E. Gralla, “Measuring the shape of a black hole photon ring,” arXiv e-prints
Original
2005
Later among the works it cites.
Jan., 2006
A. de Vries, “Shadows of rotating black holes approximated by Dürer-Pascal limaçons,” in Jahresschrift der Bochumer interdisziplinären Gesellschaft e.V. 2003 · 2006
Later among the works it cites.
V. Bozza, F. de Luca, and G. Scarpetta, “Kerr black hole lensing for generic observers in the strong deflection limit,” Phys. Rev. D 74
2006
Later among the works it cites.
J. R. Farah, D. W. Pesce, M. D. Johnson, and L. L. Blackburn, “On the approximation of the black hole shadow with a simple polar curve,” arXiv e-prints
Original
2007
Later among the works it cites.

Beyond the bibliography

alphaXiv searches the wider corpus for related work and actual follow-ups.

Open on alphaXiv

alphaXiv is searching for related work…

Cited alongside, same era.

J. P. Luminet, “Image of a spherical black hole with thin accretion disk.,” A&A 75

1979

Cited alongside, same era.

S. E. Gralla, A. Lupsasca, and A. Strominger, “Observational signature of high spin at the Event Horizon Telescope,” MNRAS 475

2018

Later among the works it cites.