A1 Refereed original research article in a scientific journal

First Very Long Baseline Interferometry Detections at 870 μm




AuthorsRaymond, Alexander W.; Doeleman, Sheperd S.; Asada, Keiichi; Blackburn, Lindy; Bower, Geoffrey C.; Bremer, Michael; Broguiere, Dominique; Chen, Ming-Tang; Crew, Geoffrey B.; Dornbusch, Sven; Fish, Vincent L.; García, Roberto; Gentaz, Olivier; Goddi, Ciriaco; Han, Chih-Chiang; Hecht, Michael H.; Huang, Yau-De; Janssen, Michael; Keating, Garrett K.; Koay, Jun Yi; Krichbaum, Thomas P.; Lo, Wen-Ping; Matsushita, Satoki; Matthews, Lynn D.; Moran, James M.; Norton, Timothy J.; Patel, Nimesh; Pesce, Dominic W.; Ramakrishnan, Venkatessh; Rottmann, Helge; Roy, Alan L.; Sánchez, Salvador; Tilanus, Remo P. J.; Titus, Michael; Torne, Pablo; Wagner, Jan; Weintroub, Jonathan; Wielgus, Maciek; Young, André; Akiyama, Kazunori; Albentosa-Ruíz, Ezequiel; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Azulay, Rebecca; Bach, Uwe; Baczko, Anne-Kathrin; Ball, David; Balokovic, Mislav; Bandyopadhyay, Bidisha; Barrett, John; Bauböck, Michi; Benson, Bradford A.; Bintley, Dan; Blundell, Raymond; Bouman, Katherine L.; Boyce, Hope; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Bronzwaer, Thomas; Bustamante, Sandra; Carlstrom, John E.; Chael, Andrew; Chan, Chi-kwan; Chang, Dominic O.; Chatterjee, Koushik; Chatterjee, Shami; Chen, 陈 Yongjun 永军; Cheng, Xiaopeng; Cho, Ilje; Christian, Pierre; Conroy, Nicholas S.; Conway, John E.; Crawford, Thomas M.; Cruz-Osorio, Alejandro; Cui, 崔 Yuzhu 玉竹; Dahale, Rohan; Davelaar, Jordy; De, Laurentis Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Dhruv, Vedant; Dihingia, Indu K.; Dzib, Sergio A.; Eatough, Ralph P.; Emami, Razieh; Falcke, Heino; Farah, Joseph; Fomalont, Edward; Fontana, Anne-Laure; Ford, H. Alyson; Foschi, Marianna; Fraga-Encinas, Raquel; Freeman, William T.; Friberg, Per; Fromm, Christian M.; Fuentes, Antonio; Galison, Peter; Gammie, Charles F.; Georgiev, Boris; Gold, Roman; Gómez-Ruiz, Arturo I.; Gómez, José L.; Gu, 顾 Minfeng 敏峰; Gurwell, Mark; Hada, Kazuhiro; Haggard, Daryl; Hesper, Ronald; Heumann, Dirk; Ho, 何 Luis C. 子山; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, 黄 Lei 磊; Hughes, David H.; Ikeda, Shiro; Impellizzeri, C. M. Violette; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Jeter, Britton; Jiang, 江 Wu 悟; Jiménez-Rosales, Alejandra; Johnson, Michael D.; Jorstad, Svetlana; Jones, Adam C.; Joshi, Abhishek V.; Jung, Taehyun; Karuppusamy, Ramesh; Kawashima, Tomohisa; Kettenis, Mark; Kim, Dong-Jin; Kim, Jae-Young; Kim, Jongsoo; Kim, Junhan; Kino, Motoki; Kocherlakota, Prashant; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Carsten; Kramer, Joana A.; Kramer, Michael; Kubo, Derek; Kuo, Cheng-Yu; La, Bella Noemi; Lee, Sang-Sung; Levis, Aviad; Li, 李 Zhiyuan 志远; Lico, Rocco; Lindahl, Greg; Lindqvist, Michael; Lisakov, Mikhail; Liu, 刘 Jun 俊; Liu, Kuo; Liuzzo, Elisabetta; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin J.; Lowitz, Amy E.; Lu, 路 Ru-Sen 如森; MacDonald, Nicholas R.; Mahieu, Sylvain; Maier, Doris; Mao, 毛 Jirong 基荣; Marchili, Nicola; Markoff, Sera; Marrone, Daniel P.; Marscher, Alan P.; Martí-Vidal, Iván; Medeiros, Lia; Menten, Karl M.; Mizuno, Izumi; Mizuno, Yosuke; Montgomery, Joshua; Moriyama, Kotaro; Moscibrodzka, Monika; Mulaudzi, Wanga; Müller, Cornelia; Müller, Hendrik; Mus, Alejandro; Musoke, Gibwa; Myserlis, Ioannis; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayanan, Gopal; Natarajan, Iniyan; Nathanail, Antonios; Fuentes, Santiago Navarro; Neilsen, Joey; Ni, Chunchong; Nowak, Michael A.; Oh, Junghwan; Okino, Hiroki; Olivares, Sánchez Héctor Raúl; Oyama, Tomoaki; Özel, Feryal; Palumbo, Daniel C. M.; Paraschos, Georgios Filippos; Park, Jongho; Parsons, Harriet; Pen, Ue-Li; Piétu, Vincent; PopStefanija, Aleksandar; Porth, Oliver; Prather, Ben; Principe, Giacomo; Psaltis, Dimitrios; Pu, Hung-Yi; Raffin, Philippe A.; Rao, Ramprasad; Rawlings, Mark G.; Ricarte, Angelo; Ripperda, Bart; Roelofs, Freek; Romero-Cañizales, Cristina; Ros, Eduardo; Roshanineshat, Arash; Ruiz, Ignacio; Ruszczyk, Chet; Rygl, Kazi L. J.; Sánchez-Argüelles, David; Sánchez-Portal, Miguel; Sasada, Mahito; Satapathy, Kaushik; Savolainen, Tuomas; Schloerb, F. Peter; Schonfeld, Jonathan; Schuster, Karl-Friedrich; Shao, Lijing; Shen, 沈 Zhiqiang 志强; Small, Des; Sohn, Bong Won; SooHoo, Jason; Sosapanta, Salas León David; Souccar, Kamal; Srinivasan, Ranjani; Stanway, Joshua S.; Sun, 孙 He 赫; Tazaki, Fumie; Tetarenko, Alexandra J.; Tiede, Paul; Toma, Kenji; Toscano, Teresa; Traianou, Efthalia; Trent, Tyler; Trippe, Sascha; Turk, Matthew; van Bemmel, Ilse; van Langevelde Huib, Jan; van Rossum, Daniel R.; Vos, Jesse; Ward-Thompson, Derek; Wardle, John; Washington, Jasmin E.; Wharton, Robert; Wiik, Kaj; Witzel, Gunther; Wondrak, Michael F.; Wong, George N.; Wu, 吴 Qingwen 庆文; Yadlapalli, Nitika; Yamaguchi, Paul; Yfantis, Aristomenis; Yoon, Doosoo; Younsi, Ziri; Yu, 于 Wei 威; Yuan, 袁 Feng 峰; Yuan, 袁 Ye-Fei 业飞; Zensus, J. Anton; Zhang, Shuo; Zhao, Guang-Yao; Zhao, 赵 Shan-Shan 杉杉



PublisherInstitute of Physics Publishing

Publication year2024

JournalThe Astronomical Journal

Journal name in sourceThe Astronomical Journal

Article number130

Volume168

Issue3

ISSN0004-6256

eISSN1538-3881

DOIhttps://doi.org/10.3847/1538-3881/ad5bdb

Web address https://iopscience.iop.org/article/10.3847/1538-3881/ad5bdb

Self-archived copy’s web addresshttps://research.utu.fi/converis/portal/detail/Publication/458464042


Abstract

The first very long baseline interferometry (VLBI) detections at 870 μm wavelength (345 GHz frequency) are reported, achieving the highest diffraction-limited angular resolution yet obtained from the surface of the Earth and the highest-frequency example of the VLBI technique to date. These include strong detections for multiple sources observed on intercontinental baselines between telescopes in Chile, Hawaii, and Spain, obtained during observations in 2018 October. The longest-baseline detections approach 11 Gλ, corresponding to an angular resolution, or fringe spacing, of 19 μas. The Allan deviation of the visibility phase at 870 μm is comparable to that at 1.3 mm on the relevant integration timescales between 2 and 100 s. The detections confirm that the sensitivity and signal chain stability of stations in the Event Horizon Telescope (EHT) array are suitable for VLBI observations at 870 μm. Operation at this short wavelength, combined with anticipated enhancements of the EHT, will lead to a unique high angular resolution instrument for black hole studies, capable of resolving the event horizons of supermassive black holes in both space and time.


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