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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set
Astrophysical Journal, Volume 959, No. 1, Article 14, Year 2023
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Description
In 2017 the Event Horizon Telescope (EHT) observed the supermassive black hole at the center of the Milky Way, Sagittarius A* (Sgr A*), at a frequency of 228.1 GHz (λ = 1.3 mm). The fundamental physics tests that even a single pulsar orbiting Sgr A* would enable motivate searching for pulsars in EHT data sets. The high observing frequency means that pulsars—which typically exhibit steep emission spectra—are expected to be very faint. However, it also negates pulse scattering, an effect that could hinder pulsar detections in the Galactic center. Additionally, magnetars or a secondary inverse Compton emission could be stronger at millimeter wavelengths than at lower frequencies. We present a search for pulsars close to Sgr A* using the data from the three most sensitive stations in the EHT 2017 campaign: the Atacama Large Millimeter/submillimeter Array, the Large Millimeter Telescope, and the IRAM 30 m Telescope. We apply three detection methods based on Fourier-domain analysis, the fast folding algorithm, and single-pulse searches targeting both pulsars and burst-like transient emission. We use the simultaneity of the observations to confirm potential candidates. No new pulsars or significant bursts were found. Being the first pulsar search ever carried out at such high radio frequencies, we detail our analysis methods and give a detailed estimation of the sensitivity of the search. We conclude that the EHT 2017 observations are only sensitive to a small fraction (≲2.2%) of the pulsars that may exist close to Sgr A*, motivating further searches for fainter pulsars in the region. © 2023. The Author(s). Published by the American Astronomical Society.
Authors & Co-Authors
Torne, Pablo
Germany, Bonn
Max Planck Institute for Radio Astronomy
Liu, Kuo
Germany, Bonn
Max Planck Institute for Radio Astronomy
Eatough, Ralph P.
Germany, Bonn
Max Planck Institute for Radio Astronomy
China, Beijing
Chinese Academy of Sciences
Cordes, James M.
United States, Ithaca
Cornell University
Desvignes, Gregory
Germany, Bonn
Max Planck Institute for Radio Astronomy
France, Paris
Sorbonne Université
de Laurentis, Mariafelicia
Italy, Naples
Università Degli Studi Di Napoli Federico Ii
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Italy, Naples
Istituto Nazionale Di Fisica Nucleare, Sezione Di Napoli
Kramer, Michael
Germany, Bonn
Max Planck Institute for Radio Astronomy
United Kingdom, Manchester
The University of Manchester
Ransom, Scott M.
United States, Charlottesville
National Radio Astronomy Observatory
Chatterjee, S.
United States, Ithaca
Cornell University
Wharton, Robert S.
United States, Pasadena
Jet Propulsion Laboratory
Karuppusamy, Ramesh
Germany, Bonn
Max Planck Institute for Radio Astronomy
Blackburn, Lindy L.
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Janssen, Michael
Germany, Bonn
Max Planck Institute for Radio Astronomy
Chan, Chikwan
United States, Tucson
The University of Arizona
Crew, Geoffrey B.
United States, Westford
Mit Haystack Observatory
Matthews, Lynn D.
United States, Westford
Mit Haystack Observatory
Goddi, Ciriaco
Brazil, Sao Paulo
Universidade de São Paulo
Italy, Cagliari
Università Degli Studi Di Cagliari
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Italy, Monserrato
Istituto Nazionale Di Fisica Nucleare, Sezione Di Cagliari
Wagner, Jan F.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Sánchez, Salvador
Unknown Affiliation
Abbate, Federico
Germany, Bonn
Max Planck Institute for Radio Astronomy
Bower, Geoffrey C.
Taiwan, Nankang
Academia Sinica Taiwan
United States, Honolulu
University of Hawaiʻi at Mānoa
Gómez-Ruiz, Arturo I.
Mexico, Puebla
Instituto Nacional de Astrofisica Optica y Electronica
Mexico, Mexico
Consejo Nacional de Humanidades, Ciencias y Tecnologías
Jiang, Wu
Unknown Affiliation
Lu, Rusen
Germany, Bonn
Max Planck Institute for Radio Astronomy
Pen, Ue Li
Unknown Affiliation
Shen, Zhiqiang
Unknown Affiliation
Śanchez-Portal, Miguel
Unknown Affiliation
Kramer, Carsten
Unknown Affiliation
Navarro, Santiago
Unknown Affiliation
John, David
Unknown Affiliation
Schuster, Karl Friedrich
Unknown Affiliation
Johnson, Michael D.
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Rygl, Kazi L.J.
Unknown Affiliation
Akiyama, Kazunori
United States, Cambridge
Harvard University
United States, Westford
Mit Haystack Observatory
Alberdi, A.
Unknown Affiliation
Alef, Walter
Germany, Bonn
Max Planck Institute for Radio Astronomy
Algaba, Juan Carlos
Unknown Affiliation
Anantua, Richard J.
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Asada, Keiichi
Unknown Affiliation
Azulay, Rebecca
Germany, Bonn
Max Planck Institute for Radio Astronomy
Bach, Uwe
Germany, Bonn
Max Planck Institute for Radio Astronomy
Baczko, Anne Kathrin
Germany, Bonn
Max Planck Institute for Radio Astronomy
Ball, David
United States, Tucson
The University of Arizona
Baloković, Mislav
Unknown Affiliation
Barrett, John P.
United States, Westford
Mit Haystack Observatory
Bauböck, Michi
Unknown Affiliation
Benson, Bradford A.
Unknown Affiliation
Bintley, Dan I.
Unknown Affiliation
Blundell, Raymond
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Bouman, Katherine L.
Unknown Affiliation
Boyce, Hope
Unknown Affiliation
Bremer, Michael A.R.
Unknown Affiliation
Brinkerink, Christiaan D.
Unknown Affiliation
Brissenden, Roger J.V.
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Britzen, Silke
Germany, Bonn
Max Planck Institute for Radio Astronomy
Broderick, Avery E.
Unknown Affiliation
Broguière, Dominique
Unknown Affiliation
Bronzwaer, Thomas
Unknown Affiliation
Bustamante, Sandra
Unknown Affiliation
Byun, Do-young
Unknown Affiliation
Carlstrom, John E.
Unknown Affiliation
Ceccobello, Chiara
Unknown Affiliation
Chael, Andrew A.
Unknown Affiliation
Chang, Dominic O.
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Chatterjee, Koushik
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Chen, Mingtang
Taiwan, Nankang
Academia Sinica Taiwan
Chen, Yongjun
Unknown Affiliation
Cheng, Xiaopeng
Unknown Affiliation
Cho, Ilje
Unknown Affiliation
Christian, Pierre
Unknown Affiliation
Conroy, Nicholas S.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Conway, John E.
Unknown Affiliation
Crawford, Thomas M.
Unknown Affiliation
Cruz-Osorio, A.
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Cui, Yuzhu
Unknown Affiliation
Davelaar, Jordy R.J.
Unknown Affiliation
Deane, Roger P.
Unknown Affiliation
Dempsey, Jessica T.
Unknown Affiliation
Dexter, Jason
Unknown Affiliation
Dhruv, Vedant
Unknown Affiliation
Doeleman, Sheperd S.
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Dougal, Sean
United States, Tucson
The University of Arizona
Dzib, Sergio A.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Emami, Razieh
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Falcke, Heino D.
Unknown Affiliation
Farah, Joseph R.
Unknown Affiliation
Fish, Vincent L.
United States, Westford
Mit Haystack Observatory
Fomalont, Edward B.
United States, Charlottesville
National Radio Astronomy Observatory
Ford, H. Alyson
United States, Tucson
The University of Arizona
Fraga-Encinas, Raquel
Unknown Affiliation
Freeman, William T.
Unknown Affiliation
Friberg, Per
Unknown Affiliation
Fromm, Christian M.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Fuentes, Antonio
Unknown Affiliation
Galison, Peter Louis
United States, Cambridge
Harvard University
Gammie, Charles F.
Unknown Affiliation
García, Roberto
Unknown Affiliation
Gentaz, Olivier
Unknown Affiliation
Georgiev, Boris
Unknown Affiliation
Gold, Roman
Unknown Affiliation
Gómez, Jose L.
Unknown Affiliation
Gu, Minfeng
Unknown Affiliation
Gurwell, Mark A.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Hada, Kazuhiro
Unknown Affiliation
Haggard, Daryl
Unknown Affiliation
Haworth, Kari
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Hecht, Michael
United States, Westford
Mit Haystack Observatory
Hesper, Ronald
Unknown Affiliation
Heumann, Dirk
United States, Tucson
The University of Arizona
Ho, Luis C.
Unknown Affiliation
Ho, Paul T.P.
Unknown Affiliation
Honma, Mareki
Unknown Affiliation
Huang, Chih Wei Locutus
Unknown Affiliation
Huang, Lei
Unknown Affiliation
Hughes, David H.
Mexico, Puebla
Instituto Nacional de Astrofisica Optica y Electronica
Ikeda, Shiro
Unknown Affiliation
Impellizzeri, Caterina M.Violette
United States, Charlottesville
National Radio Astronomy Observatory
Inoue, Makoto
Unknown Affiliation
Issaoun, Sara
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
James, David J.
Unknown Affiliation
Jannuzi, Buell T.
United States, Tucson
The University of Arizona
Jeter, Britton
Unknown Affiliation
Jiménez-Rosales, Alejandra
Unknown Affiliation
Jorstad, Svetlana G.
Unknown Affiliation
Joshi, Abhishek V.
Unknown Affiliation
Jung, Taehyun
Unknown Affiliation
Karami, Mansour
Unknown Affiliation
Kawashima, Tomohisa
Unknown Affiliation
Keating, Garrett K.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Kettenis, Mark M.
Unknown Affiliation
Kim, Dongjin
Germany, Bonn
Max Planck Institute for Radio Astronomy
Kim, Jae-young
Germany, Bonn
Max Planck Institute for Radio Astronomy
Kim, Jongsoo
Unknown Affiliation
Kim, Junhan
Unknown Affiliation
Kino, Motoki
Unknown Affiliation
Koay, J. Y.
Unknown Affiliation
Kocherlakota, Prashant
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Kofuji, Yutaro
Unknown Affiliation
Koyama, Shoko
Unknown Affiliation
Krichbaum, Thomas P.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Lauer, Tod R.
Unknown Affiliation
Lee, Daeyoung
Unknown Affiliation
Lee, Sang-sung
Unknown Affiliation
Levis, Aviad
Unknown Affiliation
Li, Zhiyuan
Unknown Affiliation
Lico, Rocco
Unknown Affiliation
Lindqvist, Michael
Unknown Affiliation
Lisakov, Mikhail M.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Liu, Jun
Germany, Bonn
Max Planck Institute for Radio Astronomy
Liuzzo, Elisabetta
Unknown Affiliation
Lo, Wenping
Unknown Affiliation
Lobanov, Andreï P.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Loinard, Laurent
Unknown Affiliation
Lonsdale, Colin J.
United States, Westford
Mit Haystack Observatory
MacDonald, Nicholas Roy
Germany, Bonn
Max Planck Institute for Radio Astronomy
Mao, Jirong
Unknown Affiliation
Marchili, Nicola
Germany, Bonn
Max Planck Institute for Radio Astronomy
Markoff, Sera B.
Unknown Affiliation
Marrone, Daniel P.
United States, Tucson
The University of Arizona
Marscher, Alan P.
Unknown Affiliation
Marti-Vidal, Ivan
Unknown Affiliation
Matsushita, Satoki
Unknown Affiliation
Medeiros, Lia
United States, Tucson
The University of Arizona
Menten, Karlm M.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Michalik, Daniel
Unknown Affiliation
Mizuno, Yosuke
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Moran, James M.
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Moriyama, Kotaro
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
United States, Westford
Mit Haystack Observatory
Mos̈cibrodzka, Monika A.
Unknown Affiliation
Müller, Cornelia
Germany, Bonn
Max Planck Institute for Radio Astronomy
Mus, Alejandro
Unknown Affiliation
Myserlis, Ioannis
Unknown Affiliation
Nadolski, Andrew
Unknown Affiliation
Nagai, Hiroshi
Unknown Affiliation
Nagar, Neil M.
Unknown Affiliation
Narayan, Ramesh
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Natarajan, Iniyan
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Nathanail, Antonios
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Neri, Roberto
Unknown Affiliation
Ni, Chunchong
Unknown Affiliation
Noutsos, Aristeidis
Germany, Bonn
Max Planck Institute for Radio Astronomy
Nowak, Michael A.
Unknown Affiliation
Olivares Sánchez, H. R.
Unknown Affiliation
Ortiz-León, Gisela N.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Oyama, Tomoaki
Unknown Affiliation
Özel, Feryal
Unknown Affiliation
Palumbo, Daniel C.M.
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Parsons, Harriet A.L.
Unknown Affiliation
Patel, Nimesh A.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Pesce, Dominic W.
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Plambeck, Richard L.
Unknown Affiliation
Porth, Oliver
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Prather, Ben S.
Unknown Affiliation
Preciado-López, Jorge A.
Unknown Affiliation
Psaltis, Dimitrios
Unknown Affiliation
Pu, Hungyi
Unknown Affiliation
Ramakrishnan, Venkatessh
Unknown Affiliation
Rao, Ramprasad
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Rawlings, Mark G.
Unknown Affiliation
Rezzolla, Luciano
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Ricarte, Angelo
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Ripperda, Bart
Unknown Affiliation
Roelofs, Freek
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Rogers, Alan E.E.
United States, Westford
Mit Haystack Observatory
Ros, Eduardo
Germany, Bonn
Max Planck Institute for Radio Astronomy
Romero-Cañizales, Cristina
Unknown Affiliation
Sánchez-Argüelles, D. O.
Mexico, Puebla
Instituto Nacional de Astrofisica Optica y Electronica
Mexico, Mexico
Consejo Nacional de Humanidades, Ciencias y Tecnologías
Sasada, Mahito
Unknown Affiliation
Satapathy, Kaushik
United States, Tucson
The University of Arizona
Savolainen, Tuomas K.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Small, Des
Unknown Affiliation
Sohn, Bongwon
Unknown Affiliation
Tetarenko, Alexandra J.
Unknown Affiliation
Tiede, Paul
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Tilanus, Remo P.J.
United States, Tucson
The University of Arizona
Traianou, Efthalia
Germany, Bonn
Max Planck Institute for Radio Astronomy
Trippe, Sascha
Unknown Affiliation
Turk, Matthew J.
Unknown Affiliation
van Bemmel, Ilse M.
Unknown Affiliation
van Langevelde, Huib Jan
Unknown Affiliation
Vos, Jesse
Unknown Affiliation
Ward-Thompson, Derek
Unknown Affiliation
Weintroub, Jonathan
United States, Cambridge
Harvard University
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Wex, Norbert
Germany, Bonn
Max Planck Institute for Radio Astronomy
Wielgus, MacIek Iej
Germany, Bonn
Max Planck Institute for Radio Astronomy
Wiik, Kaj J.
Unknown Affiliation
Witzel, Günther
Germany, Bonn
Max Planck Institute for Radio Astronomy
Wong, George N.
Unknown Affiliation
Yoon, Doosoo
Unknown Affiliation
Young, Kenneth H.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Younsi, Ziri
Germany, Frankfurt am Main
Goethe-universität Frankfurt am Main
Yuan, Yefei
Unknown Affiliation
Zensus, Anton J.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Zhao, Guangyao
Unknown Affiliation
Statistics
Citations: 1
Authors: 234
Affiliations: 24
Identifiers
Doi:
10.3847/1538-4357/acf4f2
ISSN:
0004637X
Research Areas
Environmental