2019ApJ...875L...5E

Query : 2019ApJ...875L...5E

2019ApJ...875L...5E - Astrophys. J., 875, L5-L5 (2019/April-2)

First M87 Event Horizon Telescope results. V. Physical origin of the asymmetric ring.

EVENT HORIZON TELESCOPE COLLABORATION, AKIYAMA K., ALBERDI A., ALEF W., ASADA K., AZULAY R., BACZKO A.-K., BALL D., BALOKOVIC M., BARRETT J., BINTLEY D., BLACKBURN L., BOLAND W., BOUMAN K.L., BOWER G.C., BREMER M., BRINKERINK C.D., BRISSENDEN R., BRITZEN S., BRODERICK A.E., BROGUIERE D., BRONZWAER T., BYUN D.-Y., CARLSTROM J.E., CHAEL A., CHAN C.-K., CHATTERJEE S., CHATTERJEE K., CHEN M.-T., CHEN Y., CHO I., CHRISTIAN P., CONWAY J.E., CORDES J.M., CREW G.B., CUI Y., DAVELAAR J., DE LAURENTIS M., DEANE R., DEMPSEY J., DESVIGNES G., DEXTER J., DOELEMAN S.S., EATOUGH R.P., FALCKE H., FISH V.L., FOMALONT E., FRAGA-ENCINAS R., FRIBERG P., FROMM C.M., GOMEZ J.L., GALISON P., GAMMIE C.F., GARCIA R., GENTAZ O., GEORGIEV B., GODDI C., GOLD R., GU M., GURWELL M., HADA K., HECHT M.H., HESPER R., HO L.C., HO P., HONMA M., HUANG C.-W.L., HUANG L., HUGHES D.H., IKEDA S., INOUE M., ISSAOUN S., JAMES D.J., JANNUZI B.T., JANSSEN M., JETER B., JIANG W., JOHNSON M.D., JORSTAD S., JUNG T., KARAMI M., KARUPPUSAMY R., KAWASHIMA T., KEATING G.K., KETTENIS M., KIM J.-Y., KIM J., KIM J., KINO M., KOAY J.Y., KOCH P.M., KOYAMA S., KRAMER M., KRAMER C., KRICHBAUM T.P., KUO C.-Y., LAUER T.R., LEE S.-S., LI Y.-R., LI Z., LINDQVIST M., LIU K., LIUZZO E., LO W.-P., LOBANOV A.P., LOINARD L., LONSDALE C., LU R.-S., MacDONALD N.R., MAO J., MARKOFF S., MARRONE D.P., MARSCHER A.P., MARTI-VIDAL I., MATSUSHITA S., MATTHEWS L.D., MEDEIROS L., MENTEN K.M., MIZUNO Y., MIZUNO I., MORAN J.M., MORIYAMA K., MOSCIBRODZKA M., MULLER C., NAGAI H., NAGAR N.M., NAKAMURA M., NARAYAN R., NARAYANAN G., NATARAJAN I., NERI R., NI C., NOUTSOS A., OKINO H., OLIVARES H., OYAMA T., OZEL F., PALUMBO D.C.M., PATEL N., PEN U.-L., PESCE D.W., PIETU V., PLAMBECK R., POPSTEFANIJA A., PORTH O., PRATHER B., PRECIADO-LOPEZ J.A., PSALTIS D., PU H.-Y., RAMAKRISHNAN V., RAO R., RAWLINGS M.G., RAYMOND A.W., REZZOLLA L., RIPPERDA B., ROELOFS F., ROGERS A., ROS E., ROSE M., ROSHANINESHAT A., ROTTMANN H., ROY A.L., RUSZCZYK C., RYAN B.R., RYGL K.L.J., SANCHEZ S., SANCHEZ-ARGUELLES D., SASADA M., SAVOLAINEN T., SCHLOERB F.P., SCHUSTER K.-F., SHAO L., SHEN Z., SMALL D., SOHN B.W., SOOHOO J., TAZAKI F., TIEDE P., TILANUS R.P.J., TITUS M., TOMA K., TORNE P., TRENT T., TRIPPE S., TSUDA S., VAN BEMMEL I., VAN LANGEVELDE H.J., VAN ROSSUM D.R., WAGNER J., WARDLE J., WEINTROUB J., WEX N., WHARTON R., WIELGUS M., WONG G.N., WU Q., YOUNG A., YOUNG K., YOUNSI Z., YUAN F., YUAN Y.-F., ZENSUS J.A., ZHAO G., ZHAO S.-S., ZHU Z., ANCZARSKI J., BAGANOFF F.K., ECKART A., FARAH J.R., HAGGARD D., MEYER-ZHAO Z., MICHALIK D., NADOLSKI A., NEILSEN J., NISHIOKA H., NOWAK M.A., PRADEL N., PRIMIANI R.A., SOUCCAR K., VERTATSCHITSCH L., YAMAGUCHI P. and ZHANG S.

Abstract (from CDS):

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.

Abstract Copyright: © 2019. The American Astronomical Society.

Journal keyword(s): accretion, accretion disks - black hole physics - galaxies: individual: M87 - galaxies: jets - magnetohydrodynamics MHD - techniques: high angular resolution

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Knot in M87 Jet PoG 12 30 49.355 +12 23 28.32           ~ 233 0
2 NAME M87 Jet Rad 12 30 49.423 +12 23 28.04           ~ 315 1
3 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
4 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
5 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3

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