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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31834
Title: Polarimetric Properties of Event Horizon Telescope Targets from ALMA
Authors: GODDI, CIRIACO 
Martí-Vidal, Iván
Messias, Hugo
Bower, Geoffrey C.
Broderick, Avery E.
Dexter, Jason
Marrone, Daniel P.
Moscibrodzka, Monika
Nagai, Hiroshi
Algaba, Juan Carlos
Asada, Keiichi
Crew, Geoffrey B.
Gómez, José L.
Impellizzeri, C. M. Violette
Janssen, Michael
Kadler, Matthias
Krichbaum, Thomas P.
Lico, Rocco
Matthews, Lynn D.
Nathanail, Antonios
Ricarte, Angelo
Ros, Eduardo
Younsi, Ziri
Akiyama, Kazunori
Alberdi, Antxon
Alef, Walter
Anantua, Richard
Azulay, Rebecca
Baczko, Anne-Kathrin
Ball, David
Baloković, Mislav
Barrett, John
Benson, Bradford A.
Bintley, Dan
Blackburn, Lindy
Blundell, Raymond
Boland, Wilfred
Bouman, Katherine L.
Boyce, Hope
Bremer, Michael
Brinkerink, Christiaan D.
Brissenden, Roger
Britzen, Silke
Broguiere, Dominique
Bronzwaer, Thomas
Byun, Do-Young
Carlstrom, John E.
Chael, Andrew
Chan, Chi-kwan
Chatterjee, Shami
Chatterjee, Koushik
Chen, Ming-Tang
Chen, Yongjun
Chesler, Paul M.
Cho, Ilje
Christian, Pierre
Conway, John E.
Cordes, James M.
Crawford, Thomas M.
Cruz-Osorio, Alejandro
Cui, Yuzhu
Davelaar, Jordy
De Laurentis, Mariafelicia
Deane, Roger
Dempsey, Jessica
Desvignes, Gregory
Doeleman, Sheperd S.
Eatough, Ralph P.
Falcke, Heino
Farah, Joseph
Fish, Vincent L.
Fomalont, Ed
Ford, H. Alyson
Fraga-Encinas, Raquel
Freeman, William T.
Friberg, Per
Fromm, Christian M.
Fuentes, Antonio
Galison, Peter
Gammie, Charles F.
García, Roberto
Gentaz, Olivier
Georgiev, Boris
Gold, Roman
Gómez-Ruiz, Arturo I.
Gu, Minfeng
Gurwell, Mark
Hada, Kazuhiro
Haggard, Daryl
Hecht, Michael H.
Hesper, Ronald
Ho, Luis C.
Ho, Paul
Honma, Mareki
Huang, Chih-Wei L.
Huang, Lei
Hughes, David H.
Inoue, Makoto
Issaoun, Sara
James, David J.
Jannuzi, Buell T.
Jeter, Britton
Jiang, Wu
Jimenez-Rosales, Alejandra
Johnson, Michael D.
Jorstad, Svetlana
Jung, Taehyun
Karami, Mansour
Karuppusamy, Ramesh
Kawashima, Tomohisa
Keating, Garrett K.
Kettenis, Mark
Kim, Dong-Jin
Kim, Jae-Young
Kim, Jongsoo
Kim, Junhan
Kino, Motoki
Koay, Jun Yi
Kofuji, Yutaro
Koch, Patrick M.
Koyama, Shoko
Kramer, Michael
Kramer, Carsten
Kuo, Cheng-Yu
Lauer, Tod R.
Lee, Sang-Sung
Levis, Aviad
Li, Yan-Rong
Li, Zhiyuan
Lindqvist, Michael
Lindahl, Greg
Liu, Jun
Liu, Kuo
LIUZZO, Elisabetta Teodorina 
Lo, Wen-Ping
Lobanov, Andrei P.
Loinard, Laurent
Lonsdale, Colin
Lu, Ru-Sen
MacDonald, Nicholas R.
Mao, Jirong
MARCHILI, Nicola 
Markoff, Sera
Marscher, Alan P.
Matsushita, Satoki
Medeiros, Lia
Menten, Karl M.
Mizuno, Izumi
Mizuno, Yosuke
Moran, James M.
Moriyama, Kotaro
Müller, Cornelia
Musoke, Gibwa
Mejías, Alejandro Mus
Nagar, Neil M.
Nakamura, Masanori
Narayan, Ramesh
Narayanan, Gopal
Natarajan, Iniyan
Neilsen, Joey
Neri, Roberto
Ni, Chunchong
Noutsos, Aristeidis
Nowak, Michael A.
Okino, Hiroki
Olivares, Héctor
Ortiz-León, Gisela N.
Oyama, Tomoaki
Özel, Feryal
Palumbo, Daniel C. M.
Park, Jongho
Patel, Nimesh
Pen, Ue-Li
Pesce, Dominic W.
Piétu, Vincent
Plambeck, Richard
PopStefanija, Aleksandar
Porth, Oliver
Pötzl, Felix M.
Prather, Ben
Preciado-López, Jorge A.
Psaltis, Dimitrios
Pu, Hung-Yi
Ramakrishnan, Venkatessh
Rao, Ramprasad
Rawlings, Mark G.
Raymond, Alexander W.
Rezzolla, Luciano
Ripperda, Bart
Roelofs, Freek
Rogers, Alan
Rose, Mel
Roshanineshat, Arash
Rottmann, Helge
Roy, Alan L.
Ruszczyk, Chet
RYGL, Kazi Lucie Jessica 
Sánchez, Salvador
Sánchez-Arguelles, David
Sasada, Mahito
Savolainen, Tuomas
Schloerb, F. Peter
Schuster, Karl-Friedrich
Shao, Lijing
Shen, Zhiqiang
Small, Des
Sohn, Bong Won
SooHoo, Jason
Sun, He
Tazaki, Fumie
Tetarenko, Alexandra J.
Tiede, Paul
Tilanus, Remo P. J.
Titus, Michael
Toma, Kenji
Torne, Pablo
Trent, Tyler
Traianou, Efthalia
Trippe, Sascha
van Bemmel, Ilse
van Langevelde, Huib Jan
van Rossum, Daniel R.
Wagner, Jan
Ward-Thompson, Derek
Wardle, John
Weintroub, Jonathan
Wex, Norbert
Wharton, Robert
Wielgus, Maciek
Wong, George N.
Wu, Qingwen
Yoon, Doosoo
Young, André
Young, Ken
Yuan, Feng
Yuan, Ye-Fei
Zensus, J. Anton
Zhao, Guang-Yao
Zhao, Shan-Shan
Bruni, Gabriele 
Gopakumar, A.
Hernández-Gómez, Antonio
Herrero-Illana, Ruben
Ingram, Adam
Komossa, S.
Kovalev, Y. Y.
Muders, Dirk
Perucho, Manel
Rösch, Florian
Valtonen, Mauri
Issue Date: 2021
Journal: THE ASTROPHYSICAL JOURNAL LETTERS 
Number: 910
Issue: 1
First Page: L14
Abstract: We present the results from a full polarization study carried out with the Atacama Large Millimeter/submillimeter Array (ALMA) during the first Very Long Baseline Interferometry (VLBI) campaign, which was conducted in 2017 April in the λ3 mm and λ1.3 mm bands, in concert with the Global mm-VLBI Array (GMVA) and the Event Horizon Telescope (EHT), respectively. We determine the polarization and Faraday properties of all VLBI targets, including Sgr A*, M87, and a dozen radio-loud active galactic nuclei (AGNs), in the two bands at several epochs in a time window of 10 days. We detect high linear polarization fractions (2%-15%) and large rotation measures (RM > 10<SUP>3.3</SUP>-10<SUP>5.5</SUP> rad m<SUP>-2</SUP>), confirming the trends of previous AGN studies at millimeter wavelengths. We find that blazars are more strongly polarized than other AGNs in the sample, while exhibiting (on average) order-of-magnitude lower RM values, consistent with the AGN viewing angle unification scheme. For Sgr A* we report a mean RM of (-4.2 ± 0.3) × 10<SUP>5</SUP> rad m<SUP>-2</SUP> at 1.3 mm, consistent with measurements over the past decade and, for the first time, an RM of (-2.1 ± 0.1) × 10<SUP>5</SUP> rad m<SUP>-2</SUP> at 3 mm, suggesting that about half of the Faraday rotation at 1.3 mm may occur between the 3 mm photosphere and the 1.3 mm source. We also report the first unambiguous measurement of RM toward the M87 nucleus at millimeter wavelengths, which undergoes significant changes in magnitude and sign reversals on a one year timescale, spanning the range from -1.2 to 0.3 × 10<SUP>5</SUP> rad m<SUP>-2</SUP> at 3 mm and -4.1 to 1.5 × 10<SUP>5</SUP> rad m<SUP>-2</SUP> at 1.3 mm. Given this time variability, we argue that, unlike the case of Sgr A*, the RM in M87 does not provide an accurate estimate of the mass accretion rate onto the black hole. We put forward a two-component model, comprised of a variable compact region and a static extended region, that can simultaneously explain the polarimetric properties observed by both the EHT (on horizon scales) and ALMA (which observes the combined emission from both components). These measurements provide critical constraints for the calibration, analysis, and interpretation of simultaneously obtained VLBI data with the EHT and GMVA.
URI: http://hdl.handle.net/20.500.12386/31834
URL: https://iopscience.iop.org/article/10.3847/2041-8213/abee6a
https://api.elsevier.com/content/abstract/scopus_id/85103664771
ISSN: 2041-8205
DOI: 10.3847/2041-8213/abee6a
Bibcode ADS: 2021ApJ...910L..14G
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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