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Very Long Baseline Interferometry [PDF]

Highlights of Astronomy, 1989
The technique of very long baseline interferometry (VLBI) has undergone two decades of steady growth and refinement since its inception in 1967. In the beginning, only crude measurements of visibility on single baselines were possible. Now 18-station arrays have been used to produce images with dynamic ranges exceeding 2000:1; relative motions of ...
openaire   +2 more sources

Horizonless Spacetimes As Seen by Present and Next-generation Event Horizon Telescope Arrays

The Astrophysical Journal, 2023
We study the capabilities of present and future radio very long baseline interferometry arrays to distinguish black holes from horizonless spacetimes. We consider an example of a horizonless spacetime, obtained by overspinning a regular black hole.
Astrid Eichhorn, Roman Gold, Aaron Held
doaj   +1 more source

Key Science Goals for the Next-Generation Event Horizon Telescope

Galaxies, 2023
The Event Horizon Telescope (EHT) has led to the first images of a supermassive black hole, revealing the central compact objects in the elliptical galaxy M87 and the Milky Way.
Michael D. Johnson, Kazunori Akiyama, Lindy Blackburn, Katherine L. Bouman, Avery E. Broderick, Vitor Cardoso, Rob P. Fender, Christian M. Fromm, Peter Galison, José L. Gómez, Daryl Haggard, Matthew L. Lister, Andrei P. Lobanov, Sera Markoff, Ramesh Narayan, Priyamvada Natarajan, Tiffany Nichols, Dominic W. Pesce, Ziri Younsi, Andrew Chael, Koushik Chatterjee, Ryan Chaves, Juliusz Doboszewski, Richard Dodson, Sheperd S. Doeleman, Jamee Elder, Garret Fitzpatrick, Kari Haworth, Janice Houston, Sara Issaoun, Yuri Y. Kovalev, Aviad Levis, Rocco Lico, Alexandru Marcoci, Niels C. M. Martens, Neil M. Nagar, Aaron Oppenheimer, Daniel C. M. Palumbo, Angelo Ricarte, María  J. Rioja, Freek Roelofs, Ann C. Thresher, Paul Tiede, Jonathan Weintroub, Maciek Wielgus   +44 more
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Terrestrial very-long-baseline atom interferometry: Workshop summary [PDF]

AVS Quantum Science
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around the world to discuss the exciting developments in large-scale atom interferometer (AI) prototypes and their potential for detecting ultralight dark matter and gravitational waves. The
Abend, Sven, Allard, Baptiste, Alonso, Ivan, Antoniadis, John, Araujo, Henrique, Arduini, Gianluigi, Arnold, Aidan S., Asano, Tobias, Augst, Nadja, Badurina, Leonardo, Balaz, Antun, Banks, Hannah, Barone, Michele, Barsanti, Michele, Bassi, Angelo, Battelier, Baptiste, Baynham, Charles F.A., Beaufils, Quentin, Belic, Aleksandar, Beniwal, Ankit, Bernabeu, Jose, Bertinelli, Francesco, Bertoldi, Andrea, Biswas, Ikbal Ahamed, Blas, Diego, Boegel, Patrick, Bogojevic, Aleksandar, Boehm, Jonas, Boehringer, Samuel, Bongs, Kai, Bouyer, Philippe, Brand, Christian, Brimis, Apostolos, Buchmueller, Oliver, Cacciapuoti, Luigi, Calatroni, Sergio, Canuel, Benjamin, Caprini, Chiara, Caramete, Ana, Caramete, Laurentiu, Carlesso, Matteo, Carlton, John, Casariego, Mateo, Charmandaris, Vassilis, Chen, Yu-Ao, Chiofalo, Maria Luisa, Cimbri, Alessia, Coleman, Jonathon, Constantin, Florin Lucian, Contaldi, Carlo R., Cui, Yanou, Ros, Elisa Da, Davies, Gavin, Rosendo, Esther del Pino, Deppner, Christian, Derevianko, Andrei, de Rham, Claudia, De Roeck, Albert, Derr, Daniel, Di Pumpo, Fabio, Djordjevic, Goran S., Doebrich, Babette, Domokos, Peter, Dornan, Peter, Doser, Michael, Drougakis, Giannis, Dunningham, Jacob, Duspayev, Alisher, Easo, Sajan, Eby, Joshua, Efremov, Maxim, Ekelof, Tord, Elertas, Gedminas, Ellis, John, Evans, David, Fadeev, Pavel, Fani, Mattia, Fassi, Farida, Fattori, Marco, Fayet, Pierre, Felea, Daniel, Feng, Jie, Friedrich, Alexander, Fuchs, Elina, Gaaloul, Naceur, Gao, Dongfeng, Gardner, Susan, Garraway, Barry, Gauguet, Alexandre, Gerlach, Sandra, Gersemann, Matthias, Gibson, Valerie, Giese, Enno, Giudice, Gian F., Glasbrenner, Eric P., Guendogan, Mustafa, Haehnelt, Martin, Hakulinen, Timo, Hammerer, Klemens, Hanimeli, Ekim T., Harte, Tiffany, Hawkins, Leonie, Hees, Aurelien, Heise, Jaret, Henderson, Victoria A., Herrmann, Sven, Hird, Thomas M., Hogan, Jason M., Holst, Bodil, Holynski, Michael, Hussain, Kamran, Janson, Gregor, Jeglic, Peter, Jelezko, Fedor, Kagan, Michael, Kalliokoski, Matti, Kasevich, Mark, Kehagias, Alex, Kilian, Eva, Koley, Soumen, Konrad, Bernd, Kopp, Joachim, Kornakov, Georgy, Kovachy, Tim, Krutzik, Markus, Kumar, Mukesh, Kumar, Pradeep, Laemmerzahl, Claus, Landsberg, Greg, Langlois, Mehdi, Lanigan, Bryony, Lellouch, Samuel, Leone, Bruno, Poncin-Lafitte, Christophe Le, Lewicki, Marek, Leykauf, Bastian, Lezeik, Ali, Lombriser, Lucas, Luis Lopez-Gonzalez, J., Lopez Asamar, Elias, Monjaraz, Cristian Lopez, Luciano, Giuseppe Gaetano, Mahmoud, M.A., Maleknejad, Azadeh, Krutzik, Markus, Marteau, Jacques, Massonnet, Didier, Mazumdar, Anupam, McCabe, Christopher, Meister, Matthias, Menu, Jonathan, Messineo, Giuseppe, Micalizio, Salvatore, Millington, Peter, Milosevic, Milan, Mitchell, Jeremiah, Montero, Mario, Morley, Gavin W., Mueller, Juergen, Mustecaploglu, Ozgur E., Ni, Wei-Tou, Noller, Johannes, Odzak, Senad, Oi, Daniel K.L., Omar, Yasser, Pahl, Julia, Paling, Sean, Pandey, Saurabh, Pappas, George, Pareek, Vinay, Pasatembou, Elizabeth, Pelucchi, Emanuele, dos Santos, Franck Pereira, Piest, Baptist, Pikovski, Igor, Pilaftsis, Apostolos, Plunkett, Robert, Poggiani, Rosa, Prevedelli, Marco, Puputti, Julia, Veettil, Vishnupriya Puthiya, Quenby, John, Rafelski, Johann, Rajendran, Surjeet, Rasel, Ernst M., Sfar, Haifa Rejeb, Reynaud, Serge, Richaud, Andrea, Rodzinka, Tangui, Roura, Albert, Rudolph, Jan, Sabulsky, Dylan O., Safronova, Marianna S., Santamaria, Luigi, Schilling, Manuel, Schkolnik, Vladimir, Schleich, Wolfgang P., Schlippert, Dennis, Schneider, Ulrich, Schreck, Florian, Schwersenz, Nico, Semakin, Aleksei, Sergijenko, Olga, Shao, Lijing, Singh, Rajeev, Sopuerta, Carlos F., Stergioulas, Nikolaos, Throssell, Henry, Tino, Guglielmo M., Tinsley, Jonathan N., Torres-Orjuela, Alejandro, Treutlein, Philipp, Trombettoni, Andrea, Tsai, Yu-Dai, Vaskonen, Ville, Werner, Michael, Windpassinger, Patrick, Wolf, Peter, Yahia, Mohamed E., Cruzeiro, Emmanuel Zambrini, Zarei, Moslem, Zhan, Mingsheng   +221 more
openaire   +13 more sources

Demonstrating Photon Ring Existence with Single-baseline Polarimetry

The Astrophysical Journal Letters, 2023
Images of supermassive black hole accretion flows contain features of both curved spacetime and plasma structure. Inferring properties of the spacetime from images requires modeling the plasma properties, and vice versa.
Daniel C. M. Palumbo, George N. Wong, Andrew Chael, Michael D. Johnson   +3 more
doaj   +1 more source

Evaluation of VLBI Observations with Sensitivity and Robustness Analyses

Mathematics, 2020
Very Long Baseline Interferometry (VLBI) plays an indispensable role in the realization of global terrestrial and celestial reference frames and in the determination of the full set of the Earth Orientation Parameters (EOP).
Pakize Küreç Nehbit, Robert Heinkelmann, Harald Schuh, Susanne Glaser, Susanne Lunz, Nicat Mammadaliyev, Kyriakos Balidakis, Haluk Konak, Emine Tanır Kayıkçı   +8 more
doaj   +1 more source

Super-Resolved Image of M87 Observed with East Asian VLBI Network

Galaxies, 2023
Obtaining high-resolution images at centimeter-or-longer wavelengths is vital for understanding the physics of jets. We reconstructed images from the M87 22 GHz data observed with the East Asian VLBI Network (EAVN) by using the regularized maximum ...
Fumie Tazaki, Yuzhu Cui, Kazuhiro Hada, Motoki Kino, Ilje Cho, Guang-Yao Zhao, Kazunori Akiyama, Yosuke Mizuno, Hyunwook Ro, Mareki Honma, Ru-Sen Lu, Zhi-Qiang Shen, Lang Cui, Yoshinori Yonekura   +13 more
doaj   +1 more source

The SFXC software correlator for Very Long Baseline Interferometry: Algorithms and Implementation [PDF]

, 2015
In this paper a description is given of the SFXC software correlator, developed and maintained at the Joint Institute for VLBI in Europe (JIVE). The software is designed to run on generic Linux-based computing clusters.
Calvés, G. Molera, Campbell, R. M., Cimó, G., Duev, D. A., Eldering, B., Keimpema, A., Kettenis, M. M., Kruithof, N., Marchal, D., Ozdemir, H., Paragi, Z., Pidopryhora, Y., Pogrebenko, S. V., Szomoru, A., van Langevelde, H. J., Yang, J.   +15 more
core   +2 more sources

Deep, ultra-high-resolution radio imaging of submillimetre galaxies using Very Long Baseline Interferometry [PDF]

, 2010
We present continent-scale VLBI - obtained with the European VLBI Network (EVN) at a wavelength of 18cm - of six distant, luminous submm-selected galaxies (SMGs).
A. D. Biggs, Alexander, Alexander, Appleton, Barnes, Baugh, Beelen, Biggs, Biggs, Blain, Blain, Blain, Capak, Carilli, Chapman, Chapman, Clements, Condon, Condon, Condon, Condon, Coppin, Coppin, Coppin, Coppin, Daddi, Davé, Di Matteo, Downes, Downes, Dunne, Dye, Eales, Ferrarese, Garrett, Gebhardt, Greve, Greve, Greve, Hernquist, Hildebrand, Hinshaw, Holland, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Häring, Ibar, Ibar, Ibar, Ivison, Ivison, Ivison, Ivison, Ivison, Ivison, J. D. Younger, Kormendy, Kovács, Lacki, Lacki, Lacy, Laurent, Laurent, Lonsdale, Lonsdale, Lutz, Magorrian, Menéndez-Delmestre, Menéndez-Delmestre, Mihos, Mihos, Momjian, Momjian, Momjian, Momjian, Murphy, Narayanan, Narayanan, Narayanan, Novak, Page, Papadopoulos, Pope, R. J. Ivison, Robertson, Schinnerer, Scott, Scoville, Silk, Smail, Springel, Swinbank, Swinbank, Tacconi, Tacconi, Thompson, Tremaine, Valiante, Wang, Wang, Weingartner, Wright, Yang, Younger, Younger, Younger, Younger, Younger, Younger, Younger, Yun, Yun   +116 more
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Interactions between the Jet and Disk Wind in Nearby Radio-intermediate Quasar III Zw 2

The Astrophysical Journal, 2023
Disk winds and jets are ubiquitous in active galactic nuclei (AGN), and how these two components interact remains an open question. We study the radio properties of the radio-intermediate quasar III Zw 2.
Ailing Wang, Tao An, Shaoguang Guo, Prashanth Mohan, Wara Chamani, Willem A. Baan, Talvikki Hovatta, Heino Falcke, Tim J. Galvin, Natasha Hurley-Walker, Sumit Jaiswal, Anne Lahteenmaki, Baoqiang Lao, Weijia Lv, Merja Tornikoski, Yingkang Zhang   +15 more
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