Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring. / Event Horizon Telescope Collaborat ; Эрштадт, Светлана Георгиевна.
в: Astrophysical Journal Letters, Том 875, № 1, L5, 10.04.2019.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
}
TY - JOUR
T1 - First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
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 - Friberg, Per
AU - Fromm, Christian M.
AU - Gomez, Jose L.
AU - Эрштадт, Светлана Георгиевна
PY - 2019/4/10
Y1 - 2019/4/10
N2 - The Event Horizon Telescope (EHT) has mapped the central compact radio source of the elliptical galaxy M87 at 1.3 mm with unprecedented angular resolution. Here we consider the physical implications of the asymmetric ring seen in the 2017 EHT data. To this end, we construct a large library of models based on general relativistic magnetohydrodynamic (GRMHD) simulations and synthetic images produced by general relativistic ray tracing. We compare the observed visibilities with this library and confirm that the asymmetric ring is consistent with earlier predictions of strong gravitational lensing of synchrotron emission from a hot plasma orbiting near the black hole event horizon. The ring radius and ring asymmetry depend on black hole mass and spin, respectively, and both are therefore expected to be stable when observed in future EHT campaigns. Overall, the observed image is consistent with expectations for the shadow of a spinning Kerr black hole as predicted by general relativity. If the black hole spin and M87's large scale jet are aligned, then the black hole spin vector is pointed away from Earth. Models in our library of non-spinning black holes are inconsistent with the observations as they do not produce sufficiently powerful jets. At the same time, in those models that produce a sufficiently powerful jet, the latter is powered by extraction of black hole spin energy through mechanisms akin to the Blandford-Znajek process. We briefly consider alternatives to a black hole for the central compact object. Analysis of existing EHT polarization data and data taken simultaneously at other wavelengths will soon enable new tests of the GRMHD models, as will future EHT campaigns at 230 and 345 GHz.
AB - The Event Horizon Telescope (EHT) has mapped the central compact radio source of the elliptical galaxy M87 at 1.3 mm with unprecedented angular resolution. Here we consider the physical implications of the asymmetric ring seen in the 2017 EHT data. To this end, we construct a large library of models based on general relativistic magnetohydrodynamic (GRMHD) simulations and synthetic images produced by general relativistic ray tracing. We compare the observed visibilities with this library and confirm that the asymmetric ring is consistent with earlier predictions of strong gravitational lensing of synchrotron emission from a hot plasma orbiting near the black hole event horizon. The ring radius and ring asymmetry depend on black hole mass and spin, respectively, and both are therefore expected to be stable when observed in future EHT campaigns. Overall, the observed image is consistent with expectations for the shadow of a spinning Kerr black hole as predicted by general relativity. If the black hole spin and M87's large scale jet are aligned, then the black hole spin vector is pointed away from Earth. Models in our library of non-spinning black holes are inconsistent with the observations as they do not produce sufficiently powerful jets. At the same time, in those models that produce a sufficiently powerful jet, the latter is powered by extraction of black hole spin energy through mechanisms akin to the Blandford-Znajek process. We briefly consider alternatives to a black hole for the central compact object. Analysis of existing EHT polarization data and data taken simultaneously at other wavelengths will soon enable new tests of the GRMHD models, as will future EHT campaigns at 230 and 345 GHz.
KW - accretion, accretion disks
KW - black hole physics
KW - galaxies: individual (M87)
KW - galaxies: jets magnetohydrodynamics (MHD)
KW - techniques: high angular resolution
KW - RELATIVISTIC MAGNETOHYDRODYNAMIC SIMULATIONS
KW - ADVECTION-DOMINATED ACCRETION
KW - SUPERMASSIVE BLACK-HOLE
KW - SAGITTARIUS A-ASTERISK
KW - MAGNETICALLY DRIVEN ACCRETION
KW - GRMHD SIMULATIONS
KW - EDDINGTON ACCRETION
KW - JET FORMATION
KW - FLOWS
KW - DISKS
KW - galaxies: jets
KW - magnetohydrodynamics (MHD)
UR - http://www.scopus.com/inward/record.url?scp=85064463510&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/first-m87-event-horizon-telescope-results-v-physical-origin-asymmetric-ring-1
U2 - 10.3847/2041-8213/ab0f43
DO - 10.3847/2041-8213/ab0f43
M3 - статья
VL - 875
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
SN - 2041-8205
IS - 1
M1 - L5
ER -
ID: 41193609