First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole

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First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole. / Event Horizon Telescope Collaborat ; Эрштадт, Светлана Георгиевна.

в: Astrophysical Journal Letters, Том 875, № 1, L4, 10.04.2019.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{09898a993c234ca1adf6c91fb71d6173,

title = "First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole",

abstract = "We present the first Event Horizon Telescope (EHT) images of M87, using observations from April 2017 at 1.3 mm wavelength. These images show a prominent ring with a diameter of ∼40 μas, consistent with the size and shape of the lensed photon orbit encircling the {"}shadow{"} of a supermassive black hole. The ring is persistent across four observing nights and shows enhanced brightness in the south. To assess the reliability of these results, we implemented a two-stage imaging procedure. In the first stage, four teams, each blind to the others' work, produced images of M87 using both an established method (CLEAN) and a newer technique (regularized maximum likelihood). This stage allowed us to avoid shared human bias and to assess common features among independent reconstructions. In the second stage, we reconstructed synthetic data from a large survey of imaging parameters and then compared the results with the corresponding ground truth images. This stage allowed us to select parameters objectively to use when reconstructing images of M87. Across all tests in both stages, the ring diameter and asymmetry remained stable, insensitive to the choice of imaging technique. We describe the EHT imaging procedures, the primary image features in M87, and the dependence of these features on imaging assumptions.",

keywords = "black hole physics, galaxies: individual (M87), galaxies: jets, techniques: high angular resolution, techniques: image processing, techniques: interferometric, SELF-CALIBRATION, HIGH-RESOLUTION, JET, INTERFEROMETRY, RECONSTRUCTION, IMPLEMENTATION, DECONVOLUTION, PRINCIPLES, MOTION",

author = "{Event Horizon Telescope Collaborat} and Kazunori Akiyama and Antxon Alberdi and Walter Alef and Keiichi Asada and Rebecca Azulay and Anne-Kathrin Baczko and David Ball and Mislav Balokovic 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 Do-Young Byun and Carlstrom, {John E.} and Andrew Chael and Chi-Kwan Chan and Shami Chatterjee and Koushik Chatterjee and Ming-Tang Chen 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 Freeman, {William T.} and Per Friberg and Fromm, {Christian M.} and Эрштадт, {Светлана Георгиевна}",

year = "2019",

month = apr,

day = "10",

doi = "10.3847/2041-8213/ab0e85",

language = "Английский",

volume = "875",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IOP Publishing Ltd.",

number = "1",

}

RIS

TY - JOUR

T1 - First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole

AU - Event Horizon Telescope Collaborat

AU - Akiyama, Kazunori

AU - Alberdi, Antxon

AU - Alef, Walter

AU - Asada, Keiichi

AU - Azulay, Rebecca

AU - Baczko, Anne-Kathrin

AU - Ball, David

AU - Balokovic, 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 - Freeman, William T.

AU - Friberg, Per

AU - Fromm, Christian M.

AU - Эрштадт, Светлана Георгиевна

PY - 2019/4/10

Y1 - 2019/4/10

N2 - We present the first Event Horizon Telescope (EHT) images of M87, using observations from April 2017 at 1.3 mm wavelength. These images show a prominent ring with a diameter of ∼40 μas, consistent with the size and shape of the lensed photon orbit encircling the "shadow" of a supermassive black hole. The ring is persistent across four observing nights and shows enhanced brightness in the south. To assess the reliability of these results, we implemented a two-stage imaging procedure. In the first stage, four teams, each blind to the others' work, produced images of M87 using both an established method (CLEAN) and a newer technique (regularized maximum likelihood). This stage allowed us to avoid shared human bias and to assess common features among independent reconstructions. In the second stage, we reconstructed synthetic data from a large survey of imaging parameters and then compared the results with the corresponding ground truth images. This stage allowed us to select parameters objectively to use when reconstructing images of M87. Across all tests in both stages, the ring diameter and asymmetry remained stable, insensitive to the choice of imaging technique. We describe the EHT imaging procedures, the primary image features in M87, and the dependence of these features on imaging assumptions.

AB - We present the first Event Horizon Telescope (EHT) images of M87, using observations from April 2017 at 1.3 mm wavelength. These images show a prominent ring with a diameter of ∼40 μas, consistent with the size and shape of the lensed photon orbit encircling the "shadow" of a supermassive black hole. The ring is persistent across four observing nights and shows enhanced brightness in the south. To assess the reliability of these results, we implemented a two-stage imaging procedure. In the first stage, four teams, each blind to the others' work, produced images of M87 using both an established method (CLEAN) and a newer technique (regularized maximum likelihood). This stage allowed us to avoid shared human bias and to assess common features among independent reconstructions. In the second stage, we reconstructed synthetic data from a large survey of imaging parameters and then compared the results with the corresponding ground truth images. This stage allowed us to select parameters objectively to use when reconstructing images of M87. Across all tests in both stages, the ring diameter and asymmetry remained stable, insensitive to the choice of imaging technique. We describe the EHT imaging procedures, the primary image features in M87, and the dependence of these features on imaging assumptions.

KW - black hole physics

KW - galaxies: individual (M87)

KW - galaxies: jets

KW - techniques: high angular resolution

KW - techniques: image processing

KW - techniques: interferometric

KW - SELF-CALIBRATION

KW - HIGH-RESOLUTION

KW - JET

KW - INTERFEROMETRY

KW - RECONSTRUCTION

KW - IMPLEMENTATION

KW - DECONVOLUTION

KW - PRINCIPLES

KW - MOTION

UR - http://www.scopus.com/inward/record.url?scp=85064456798&partnerID=8YFLogxK

UR - http://stacks.iop.org/2041-8205/875/i=1/a=L4?key=crossref.f93f0b1565bb46b48cb890351d9fef13

UR - http://www.mendeley.com/research/first-m87-event-horizon-telescope-results-iv-imaging-central-supermassive-black-hole

U2 - 10.3847/2041-8213/ab0e85

DO - 10.3847/2041-8213/ab0e85

M3 - статья

VL - 875

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

IS - 1

M1 - L4

ER -

ID: 41191567