2022ApJ...930L..14E

Query : 2022ApJ...930L..14E

2022ApJ...930L..14E - Astrophys. J., 930, L14-L14 (2022/May-2)

First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole.

EHT COLLABORATION, AKIYAMA K., ALBERDI A., ALEF W., ALGABA J.C., ANANTUA R., ASADA K., AZULAY R., BACH U., BACZKO A.-K., BALL D., BALOKOVIC M., BARRETT J., BAUBOCK M., BENSON B.A., BINTLEY D., BLACKBURN L., BLUNDELL R., BOUMAN K.L., BOWER G.C., BOYCE H., BREMER M., BRINKERINK C.D., BRISSENDEN R., BRITZEN S., BRODERICK A.E., BROGUIERE D., BRONZWAER T., BUSTAMANTE S., BYUN D.-Y., CARLSTROM J.E., CECCOBELLO C., CHAEL A., CHAN C.-K., CHATTERJEE K., CHATTERJEE S., CHEN M.-T., CHEN Y., CHENG X., CHO I., CHRISTIAN P., CONROY N.S., 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., DHRUV V., DOELEMAN S.S., DOUGAL S., DZIB S.A., EATOUGH R.P., EMAMI R., 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-RUIZ A.I., GOMEZ J.L., GU M., GURWELL M., HADA K., HAGGARD D., HAWORTH K., HECHT M.H., HESPER R., HEUMANN D., HO L.C., HO P., HONMA M., HUANG C.-W.L., HUANG L., HUGHES D.H., IKEDA S., IMPELLIZZERI C.M.V., INOUE M., ISSAOUN S., JAMES D.J., JANNUZI B.T., JANSSEN M., JETER B., JIANG W., JIMENEZ-ROSALES A., JOHNSON M.D., JORSTAD S., JOSHI A.V., 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., KOCHERLAKOTA P., KOFUJI Y., KOCH P.M., KOYAMA S., KRAMER C., KRAMER M., KRICHBAUM T.P., KUO C.-Y., LA BELLA N., LAUER T.R., LEE D., LEE S.-S., LEUNG P.K., LEVIS A., LI Z., LICO R., LINDAHL G., LINDQVIST M., LISAKOV M., LIU J., LIU K., LIUZZO E., LO W.-P., LOBANOV A.P., LOINARD L., LONSDALE C.J., LU R.-S., 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., MICHALIK D., MIZUNO I., MIZUNO Y., MORAN J.M., MORIYAMA K., MOSCIBRODZKA M., MULLER C., MUS A., MUSOKE G., MYSERLIS I., NADOLSKI A., NAGAI H., NAGAR N.M., NAKAMURA M., NARAYAN R., NARAYANAN G., NATARAJAN I., NATHANAIL A., NAVARRO FUENTES S., NEILSEN J., NERI R., NI C., NOUTSOS A., NOWAK M.A., OH J., OKINO H., OLIVARES H., ORTIZ-LEON G.N., OYAMA T., OZEL F., PALUMBO D.C.M., PARASCHOS G.F., PARK J., PARSONS H., 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., ROMERO-CANIZALES C., ROSHANINESHAT A., ROTTMANN H., ROY A.L., RUIZ I., RUSZCZYK C., RYGL K.L.J., SANCHEZ S., SANCHEZ-ARGUELLES D., SANCHEZ-PORTAL M., SASADA M., SATAPATHY K., SAVOLAINEN T., SCHLOERB F.P., SCHONFELD J., SCHUSTER K.-F., SHAO L., SHEN Z., SMALL D., SOHN B.W., SOOHOO J., SOUCCAR K., SUN H., TAZAKI F., TETARENKO A.J., TIEDE P., TILANUS R.P.J., TITUS M., TORNE P., TRAIANOU E., TRENT T., TRIPPE S., TURK M., VAN BEMMEL I., VAN LANGEVELDE H.J., VAN ROSSUM D.R., VOS J., WAGNER J., WARD-THOMPSON D., WARDLE J., WEINTROUB J., WEX N., WHARTON R., WIELGUS M., WIIK K., WITZEL G., WONDRAK M.F., WONG G.N., WU Q., YAMAGUCHI P., YOON D., YOUNG A., YOUNG K., YOUNSI Z., YUAN F., YUAN Y.-F., ZENSUS J.A., ZHANG S., ZHAO G.-Y. and ZHAO S.-S.

Abstract (from CDS):

We present the first event-horizon-scale images and spatiotemporal analysis of Sgr A* taken with the Event Horizon Telescope in 2017 April at a wavelength of 1.3 mm. Imaging of Sgr A* has been conducted through surveys over a wide range of imaging assumptions using the classical CLEAN algorithm, regularized maximum likelihood methods, and a Bayesian posterior sampling method. Different prescriptions have been used to account for scattering effects by the interstellar medium toward the Galactic center. Mitigation of the rapid intraday variability that characterizes Sgr A* has been carried out through the addition of a "variability noise budget" in the observed visibilities, facilitating the reconstruction of static full-track images. Our static reconstructions of Sgr A* can be clustered into four representative morphologies that correspond to ring images with three different azimuthal brightness distributions and a small cluster that contains diverse nonring morphologies. Based on our extensive analysis of the effects of sparse (u, v)-coverage, source variability, and interstellar scattering, as well as studies of simulated visibility data, we conclude that the Event Horizon Telescope Sgr A* data show compelling evidence for an image that is dominated by a bright ring of emission with a ring diameter of ∼50 µas, consistent with the expected "shadow" of a 4 x 106 M☉ black hole in the Galactic center located at a distance of 8 kpc.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Astrophysical black holes

Simbad objects: 7

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Number of rows : 7
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 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
2 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
3 QSO B1730-130 Bla 17 33 02.70578907 -13 04 49.5482119   18 19.50 18.78 17.39 ~ 1198 1
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
6 QSO B1921-293 BLL 19 24 51.05595254 -29 14 30.1210248   18.71 18.21 15.07   ~ 918 1
7 V* V404 Cyg HXB 20 24 03.8247037434 +33 52 01.961154861           G9/K0III/V 1370 0

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