2021ApJ...910L..12E

Query : 2021ApJ...910L..12E

2021ApJ...910L..12E - Astrophys. J., 910, L12-L12 (2021/March-3)

First M87 Event Horizon Telescope results. VII. Polarization of the ring.

EVENT HORIZON TELESCOPE COLLABORATION, AKIYAMA K., ALGABA J.C., ALBERDI A., ALEF W., ANANTUA R., ASADA K., AZULAY R., BACZKO A.-K., BALL D., BALOKOVIC M., BARRETT J., BENSON B.A., BINTLEY D., BLACKBURN L., BLUNDELL R., BOLAND W., BOUMAN K.L., BOWER G.C., BOYCE H., 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., CHESLER P.M., CHO I., CHRISTIAN P., CONWAY J.E., CORDES J.M., CRAWFORD T.M., CREW G.B., CRUZ-OSORIO A., CUI Y., DAVELAAR J., DE LAURENTIS M., DEANE R., DEMPSEY J., DESVIGNES G., DEXTER J., DOELEMAN S.S., EATOUGH R.P., FALCKE H., FARAH J., FISH V.L., FOMALONT E., FORD H.A., FRAGA-ENCINAS R., FREEMAN W.T., FRIBERG P., FROMM C.M., FUENTES A., GALISON P., GAMMIE C.F., GARCIA R., GENTAZ O., GEORGIEV B., GODDI C., GOLD R., GOMEZ J.L., GOMEZ-RUIZ A.I., GU M., GURWELL M., HADA K., HAGGARD D., 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., JIMENEZ-ROSALES A., JOHNSON M.D., JORSTAD S., JUNG T., KARAMI M., KARUPPUSAMY R., KAWASHIMA T., KEATING G.K., KETTENIS M., KIM D.-J., KIM J.-Y., KIM J., KIM J., KINO M., KOAY J.Y., KOFUJI Y., KOCH P.M., KOYAMA S., KRAMER M., KRAMER C., KRICHBAUM T.P., KUO C.-Y., LAUER T.R., LEE S.-S., LEVIS A., LI Y.-R., LI Z., LINDQVIST M., LICO R., LINDAHL G., LIU J., LIU K., LIUZZO E., LO W.-P., LOBANOV A.P., LOINARD L., LONSDALE C., LU R.-S., MacDONALD N.R., MAO J., MARCHILI N., MARKOFF S., MARRONE D.P., MARSCHER A.P., MARTI-VIDAL I., MATSUSHITA S., MATTHEWS L.D., MEDEIROS L., MENTEN K.M., MIZUNO I., MIZUNO Y., MORAN J.M., MORIYAMA K., MOSCIBRODZKA M., MULLER C., MUSOKE G., MUS MEJIAS A., MICHALIK D., NADOLSKI A., NAGAI H., NAGAR N.M., NAKAMURA M., NARAYAN R., NARAYANAN G., NATARAJAN I., NATHANAIL A., NEILSEN J., NERI R., NI C., NOUTSOS A., NOWAK M.A., OKINO H., OLIVARES H., ORTIZ-LEON G.N., OYAMA T., OZEL F., PALUMBO D.C.M., PARK J., PATEL N., PEN U.-L., PESCE D.W., PIETU V., PLAMBECK R., POPSTEFANIJA A., PORTH O., POTZL F.M., PRATHER B., PRECIADO-LOPEZ J.A., PSALTIS D., PU H.-Y., RAMAKRISHNAN V., RAO R., RAWLINGS M.G., RAYMOND A.W., REZZOLLA L., RICARTE A., RIPPERDA B., ROELOFS F., ROGERS A., ROS E., ROSE M., ROSHANINESHAT A., ROTTMANN H., ROY A.L., RUSZCZYK C., 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., SUN H., TAZAKI F., TETARENKO A.J., TIEDE P., TILANUS R.P.J., TITUS M., TOMA K., TORNE P., TRENT T., TRAIANOU E., TRIPPE S., VAN BEMMEL I., VAN LANGEVELDE H.J., VAN ROSSUM D.R., WAGNER J., WARD-THOMPSON D., WARDLE J., WEINTROUB J., WEX N., WHARTON R., WIELGUS M., WONG G.N., WU Q., YOON D., YOUNG A., YOUNG K., YOUNSI Z., YUAN F., YUAN Y.-F., ZENSUS J.A., ZHAO G.-Y., ZHAO S.-S. (The Event Horizon Telescope Collaboration)

Abstract (from CDS):

In 2017 April, the Event Horizon Telescope (EHT) observed the near-horizon region around the supermassive black hole at the core of the M87 galaxy. These 1.3 mm wavelength observations revealed a compact asymmetric ring-like source morphology. This structure originates from synchrotron emission produced by relativistic plasma located in the immediate vicinity of the black hole. Here we present the corresponding linear-polarimetric EHT images of the center of M87. We find that only a part of the ring is significantly polarized. The resolved fractional linear polarization has a maximum located in the southwest part of the ring, where it rises to the level of ∼15%. The polarization position angles are arranged in a nearly azimuthal pattern. We perform quantitative measurements of relevant polarimetric properties of the compact emission and find evidence for the temporal evolution of the polarized source structure over one week of EHT observations. The details of the polarimetric data reduction and calibration methodology are provided. We carry out the data analysis using multiple independent imaging and modeling techniques, each of which is validated against a suite of synthetic data sets. The gross polarimetric structure and its apparent evolution with time are insensitive to the method used to reconstruct the image. These polarimetric images carry information about the structure of the magnetic fields responsible for the synchrotron emission. Their physical interpretation is discussed in an accompanying publication.

Abstract Copyright: © 2021. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Polarimetry - Radio interferometry - Very long baseline interferometry - Supermassive black holes - Active galactic nuclei - Low-luminosity active galactic nuclei - Astronomy data modeling - Galaxy accretion disks - Galaxies: individual: M87

Simbad objects: 12

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Number of rows : 12
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 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
2 4C 01.28 BLL 10 58 29.60520810 +01 33 58.8237454   18.74 18.28 16.68   ~ 828 2
3 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
4 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
5 NAME M87 Jet Rad 12 30 49.423 +12 23 28.04           ~ 315 1
6 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
7 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
8 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
9 QSO B1730-130 Bla 17 33 02.70578907 -13 04 49.5482119   18 19.50 18.78 17.39 ~ 1198 1
10 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
11 QSO B1921-293 BLL 19 24 51.05595254 -29 14 30.1210248   18.71 18.21 15.07   ~ 918 1
12 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2

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