First M87 Event Horizon Telescope Results. VI. the Shadow and Mass of the Central Black Hole

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First M87 Event Horizon Telescope Results. VI. the Shadow and Mass of the Central Black Hole. / Event Horizon Telescope Collaboration ; Savolainen, Tuomas.

In: Astrophysical Journal Letters, Vol. 875, No. 1, L6, 10.04.2019.

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@article{85eb496668c64585a270cf3aabc93ddc,
title = "First M87 Event Horizon Telescope Results. VI. the Shadow and Mass of the Central Black Hole",
abstract = "We present measurements of the properties of the central radio source in M87 using Event Horizon Telescope data obtained during the 2017 campaign. We develop and fit geometric crescent models (asymmetric rings with interior brightness depressions) using two independent sampling algorithms that consider distinct representations of the visibility data. We show that the crescent family of models is statistically preferred over other comparably complex geometric models that we explore. We calibrate the geometric model parameters using general relativistic magnetohydrodynamic (GRMHD) models of the emission region and estimate physical properties of the source. We further fit images generated from GRMHD models directly to the data. We compare the derived emission region and black hole parameters from these analyses with those recovered from reconstructed images. There is a remarkable consistency among all methods and data sets. We find that >50{\%} of the total flux at arcsecond scales comes from near the horizon, and that the emission is dramatically suppressed interior to this region by a factor >10, providing direct evidence of the predicted shadow of a black hole. Across all methods, we measure a crescent diameter of 42 ±3 μas and constrain its fractional width to be <0.5. Associating the crescent feature with the emission surrounding the black hole shadow, we infer an angular gravitational radius of GM/Dc 2 =3.8 ±0.4 μas. Folding in a distance measurement of gives a black hole mass of . This measurement from lensed emission near the event horizon is consistent with the presence of a central Kerr black hole, as predicted by the general theory of relativity.",
keywords = "black hole physics, galaxies: individual (M87), gravitation, techniques: high angular resolution, techniques: interferometric",
author = "{Event Horizon Telescope Collaboration} and Kazunori Akiyama and Antxon Alberdi and Walter Alef and Keiichi Asada and Rebecca Azulay and Baczko, {Anne Kathrin} and David Ball and Mislav Baloković and John Barrett and Dan Bintley and Lindy Blackburn and Wilfred Boland and Bouman, {Katherine L.} and Bower, {Geoffrey C.} and Michael Bremer and Brinkerink, {Christiaan D.} and Roger Brissenden and Silke Britzen and Broderick, {Avery E.} and Dominique Broguiere and Thomas Bronzwaer and Byun, {Do Young} and Carlstrom, {John E.} and Andrew Chael and Chan, {Chi Kwan} and Shami Chatterjee and Koushik Chatterjee and Chen, {Ming Tang} and Yongjun Chen and Ilje Cho and Pierre Christian and Conway, {John E.} and Cordes, {James M.} and Crew, {Geoffrey B.} and Yuzhu Cui and Jordy Davelaar and {De Laurentis}, Mariafelicia and Roger Deane and Jessica Dempsey and Gregory Desvignes and Jason Dexter and Doeleman, {Sheperd S.} and Eatough, {Ralph P.} and Heino Falcke and Fish, {Vincent L.} and Ed Fomalont and Raquel Fraga-Encinas and Venkatessh Ramakrishnan and Tuomas Savolainen and Jan Wagner",
year = "2019",
month = "4",
day = "10",
doi = "10.3847/2041-8213/ab1141",
language = "English",
volume = "875",
journal = "Astrophysical Journal Letters",
issn = "2041-8205",
publisher = "IOP Publishing Ltd.",
number = "1",

}

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TY - JOUR

T1 - First M87 Event Horizon Telescope Results. VI. the Shadow and Mass of the Central Black Hole

AU - Event Horizon Telescope Collaboration

AU - Akiyama, Kazunori

AU - Alberdi, Antxon

AU - Alef, Walter

AU - Asada, Keiichi

AU - Azulay, Rebecca

AU - Baczko, Anne Kathrin

AU - Ball, David

AU - Baloković, Mislav

AU - Barrett, John

AU - Bintley, Dan

AU - Blackburn, Lindy

AU - Boland, Wilfred

AU - Bouman, Katherine L.

AU - Bower, Geoffrey C.

AU - Bremer, Michael

AU - Brinkerink, Christiaan D.

AU - Brissenden, Roger

AU - Britzen, Silke

AU - Broderick, Avery E.

AU - Broguiere, Dominique

AU - Bronzwaer, Thomas

AU - Byun, Do Young

AU - Carlstrom, John E.

AU - Chael, Andrew

AU - Chan, Chi Kwan

AU - Chatterjee, Shami

AU - Chatterjee, Koushik

AU - Chen, Ming Tang

AU - Chen, Yongjun

AU - Cho, Ilje

AU - Christian, Pierre

AU - Conway, John E.

AU - Cordes, James M.

AU - Crew, Geoffrey B.

AU - Cui, Yuzhu

AU - Davelaar, Jordy

AU - De Laurentis, Mariafelicia

AU - Deane, Roger

AU - Dempsey, Jessica

AU - Desvignes, Gregory

AU - Dexter, Jason

AU - Doeleman, Sheperd S.

AU - Eatough, Ralph P.

AU - Falcke, Heino

AU - Fish, Vincent L.

AU - Fomalont, Ed

AU - Fraga-Encinas, Raquel

AU - Ramakrishnan, Venkatessh

AU - Savolainen, Tuomas

AU - Wagner, Jan

PY - 2019/4/10

Y1 - 2019/4/10

N2 - We present measurements of the properties of the central radio source in M87 using Event Horizon Telescope data obtained during the 2017 campaign. We develop and fit geometric crescent models (asymmetric rings with interior brightness depressions) using two independent sampling algorithms that consider distinct representations of the visibility data. We show that the crescent family of models is statistically preferred over other comparably complex geometric models that we explore. We calibrate the geometric model parameters using general relativistic magnetohydrodynamic (GRMHD) models of the emission region and estimate physical properties of the source. We further fit images generated from GRMHD models directly to the data. We compare the derived emission region and black hole parameters from these analyses with those recovered from reconstructed images. There is a remarkable consistency among all methods and data sets. We find that >50% of the total flux at arcsecond scales comes from near the horizon, and that the emission is dramatically suppressed interior to this region by a factor >10, providing direct evidence of the predicted shadow of a black hole. Across all methods, we measure a crescent diameter of 42 ±3 μas and constrain its fractional width to be <0.5. Associating the crescent feature with the emission surrounding the black hole shadow, we infer an angular gravitational radius of GM/Dc 2 =3.8 ±0.4 μas. Folding in a distance measurement of gives a black hole mass of . This measurement from lensed emission near the event horizon is consistent with the presence of a central Kerr black hole, as predicted by the general theory of relativity.

AB - We present measurements of the properties of the central radio source in M87 using Event Horizon Telescope data obtained during the 2017 campaign. We develop and fit geometric crescent models (asymmetric rings with interior brightness depressions) using two independent sampling algorithms that consider distinct representations of the visibility data. We show that the crescent family of models is statistically preferred over other comparably complex geometric models that we explore. We calibrate the geometric model parameters using general relativistic magnetohydrodynamic (GRMHD) models of the emission region and estimate physical properties of the source. We further fit images generated from GRMHD models directly to the data. We compare the derived emission region and black hole parameters from these analyses with those recovered from reconstructed images. There is a remarkable consistency among all methods and data sets. We find that >50% of the total flux at arcsecond scales comes from near the horizon, and that the emission is dramatically suppressed interior to this region by a factor >10, providing direct evidence of the predicted shadow of a black hole. Across all methods, we measure a crescent diameter of 42 ±3 μas and constrain its fractional width to be <0.5. Associating the crescent feature with the emission surrounding the black hole shadow, we infer an angular gravitational radius of GM/Dc 2 =3.8 ±0.4 μas. Folding in a distance measurement of gives a black hole mass of . This measurement from lensed emission near the event horizon is consistent with the presence of a central Kerr black hole, as predicted by the general theory of relativity.

KW - black hole physics

KW - galaxies: individual (M87)

KW - gravitation

KW - techniques: high angular resolution

KW - techniques: interferometric

UR - http://www.scopus.com/inward/record.url?scp=85064706726&partnerID=8YFLogxK

U2 - 10.3847/2041-8213/ab1141

DO - 10.3847/2041-8213/ab1141

M3 - Article

VL - 875

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

IS - 1

M1 - L6

ER -

ID: 33508382