Zobrazeno 1 - 10
of 201
pro vyhledávání: '"Kovalev, Yuri"'
Autor:
Petrov, Leonid, Kovalev, Yuri
We present the all-sky catalogue of absolute positions and estimates of correlated flux density of 21,942 compact radio sources determined from processing interferometric visibility data of virtually all VLBI observing sessions at 2 to 23 GHz from 72
Externí odkaz:
http://arxiv.org/abs/2410.11794
Autor:
Johnson, Michael D., Akiyama, Kazunori, Baturin, Rebecca, Bilyeu, Bryan, Blackburn, Lindy, Boroson, Don, Cardenas-Avendano, Alejandro, Chael, Andrew, Chan, Chi-kwan, Chang, Dominic, Cheimets, Peter, Chou, Cathy, Doeleman, Sheperd S., Farah, Joseph, Galison, Peter, Gamble, Ronald, Gammie, Charles F., Gelles, Zachary, Gomez, Jose L., Gralla, Samuel E., Grimes, Paul, Gurvits, Leonid I., Hadar, Shahar, Haworth, Kari, Hada, Kazuhiro, Hecht, Michael H., Honma, Mareki, Houston, Janice, Hudson, Ben, Issaoun, Sara, Jia, He, Jorstad, Svetlana, Kauffmann, Jens, Kovalev, Yuri Y., Kurczynski, Peter, Lafon, Robert, Lupsasca, Alexandru, Lehmensiek, Robert, Ma, Chung-Pei, Marrone, Daniel P., Marscher, Alan P., Melnick, Gary J., Narayan, Ramesh, Niinuma, Kotaro, Noble, Scott C., Palmer, Eric J., Palumbo, Daniel C. M., Paritsky, Lenny, Peretz, Eliad, Pesce, Dominic, Plavin, Alexander, Quataert, Eliot, Rana, Hannah, Ricarte, Angelo, Roelofs, Freek, Shtyrkova, Katia, Sinclair, Laura C., Small, Jeffrey, Kumara, Sridharan Tirupati, Srinivasan, Ranjani, Strominger, Andrew, Tiede, Paul, Tong, Edward, Wang, Jade, Weintroub, Jonathan, Wielgus, Maciek, Wong, George, Zhang, Xinyue Alice
We present the Black Hole Explorer (BHEX), a mission that will produce the sharpest images in the history of astronomy by extending submillimeter Very-Long-Baseline Interferometry (VLBI) to space. BHEX will discover and measure the bright and narrow
Externí odkaz:
http://arxiv.org/abs/2406.12917
Autor:
Issaoun, Sara, Alonso, Kim, Akiyama, Kazunori, Blackburn, Lindy, Boroson, Don, Galison, Peter, Haworth, Kari, Houston, Janice, Johnson, Michael D., Kovalev, Yuri Y., Kurczynski, Peter, Lafon, Robert, Marrone, Daniel P., Palumbo, Daniel, Peretz, Eliad, Pesce, Dominic, Petrov, Leonid, Plavin, Alexander, Wang, Jade
Publikováno v:
Proc. SPIE 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave, 130926P
We present a baseline science operations plan for the Black Hole Explorer (BHEX), a space mission concept aiming to confirm the existence of the predicted sharp ``photon ring" resulting from strongly lensed photon trajectories around black holes, as
Externí odkaz:
http://arxiv.org/abs/2406.09610
Autor:
Cho, Ilje, Gómez, José L., Lico, Rocco, Zhao, Guang-Yao, Traianou, Efthalia, Dahale, Rohan, Fuentes, Antonio, Toscano, Teresa, Foschi, Marianna, Kovalev, Yuri Y., Lobanov, Andrei, Pushkarev, Alexander B., Gurvits, Leonid I., Kim, Jae-Young, Lisakov, Mikhail, Voitsik, Petr, Myserlis, Ioannis, Pötzl, Felix, Ros, Eduardo
Publikováno v:
A&A 2024, 683, A248
We present total intensity and linear polarization images of OJ287 at 1.68GHz, obtained through space-based VLBI observations with RadioAstron on April 16, 2016. The observations were conducted using a ground array consisting of the VLBA and the EVN.
Externí odkaz:
http://arxiv.org/abs/2312.08643
Autor:
Fuentes, Antonio, Gómez, José L., Martí, José M., Perucho, Manel, Zhao, Guang-Yao, Lico, Rocco, Lobanov, Andrei P., Bruni, Gabriele, Kovalev, Yuri Y., Chael, Andrew, Akiyama, Kazunori, Bouman, Katherine L., Sun, He, Cho, Ilje, Traianou, Efthalia, Toscano, Teresa, Dahale, Rohan, Foschi, Marianna, Gurvits, Leonid I., Jorstad, Svetlana, Kim, Jae-Young, Marscher, Alan P., Mizuno, Yosuke, Ros, Eduardo, Savolainen, Tuomas
Publikováno v:
Nature Astronomy 7 (2023) 1359
Supermassive black holes at the centre of active galactic nuclei power some of the most luminous objects in the Universe. Typically, very long baseline interferometric (VLBI) observations of blazars have revealed only funnel-like morphologies with li
Externí odkaz:
http://arxiv.org/abs/2311.01861
Autor:
Johnson, Michael D., Akiyama, Kazunori, Blackburn, Lindy, Bouman, Katherine L., Broderick, Avery E., Cardoso, Vitor, Fender, R. P., Fromm, Christian M., Galison, Peter, Gómez, José L., Haggard, Daryl, Lister, Matthew L., Lobanov, Andrei P., Markoff, Sera, Narayan, Ramesh, Natarajan, Priyamvada, Nichols, Tiffany, Pesce, Dominic W., Younsi, Ziri, Chael, Andrew, Chatterjee, Koushik, Chaves, Ryan, Doboszewski, Juliusz, Dodson, Richard, Doeleman, Sheperd S., Elder, Jamee, Fitzpatrick, Garret, Haworth, Kari, Houston, Janice, Issaoun, Sara, Kovalev, Yuri Y., Levis, Aviad, Lico, Rocco, Marcoci, Alexandru, Martens, Niels C. M., Nagar, Neil M., Oppenheimer, Aaron, Palumbo, Daniel C. M., Ricarte, Angelo, Rioja, María J., Roelofs, Freek, Thresher, Ann C., Tiede, Paul, Weintroub, Jonathan, Wielgus, Maciek
Publikováno v:
Galaxies 2023, 11(3), 61
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. Proposed upgrades to this array through the next-generation EHT (ngEHT)
Externí odkaz:
http://arxiv.org/abs/2304.11188
Autor:
Kim, Jae-Young, Savolainen, Tuomas, Voitsik, Petr, Kravchenko, Evgeniya V., Lisakov, Mikhail M., Kovalev, Yuri Y., Müller, Hendrik, Lobanov, Andrei P., Sokolovsky, Kirill V., Bruni, Gabriele, Edwards, Philip G., Reynolds, Cormac, Bach, Uwe, Gurvits, Leonid I., Krichbaum, Thomas P., Hada, Kazuhiro, Giroletti, Marcello, Orienti, Monica, Anderson, James M., Lee, Sang-Sung, Sohn, Bong Won, Zensus, J. Anton
Publikováno v:
ApJ 952 (2023) 34
We present results from the first 22 GHz space very-long-baseline interferometric (VLBI) imaging observations of M87 by RadioAstron. As a part of the Nearby AGN Key Science Program, the source was observed in Feb 2014 at 22 GHz with 21 ground station
Externí odkaz:
http://arxiv.org/abs/2304.09816
Autor:
Casadio, Carolina, Gómez, José, Jorstad, Svetlana, Marscher, Alan, Grandi, Paola, Larionov, Valeri, Lister, Matthew, Smith, Paul, Gurwell, Mark, Lähteenmäki, Anne, Agudo, Iván, Molina, Sol, Bala, Vishal, Joshi, Manasvita, Taylor, Brian, Williamson, Karen, Kovalev, Yuri, Savolainen, Tuomas, Pushkarev, Alexander, Arkharov, Arkady, Blinov, Dmitry, Borman, George, Di Paola, Andrea, Grishina, Tatiana, Hagen-Thorn, Vladimir, Itoh, Ryosuke, Kopatskaya, Evgenia, Larionova, Elena, Larionova, Liudmila, Morozova, Daria, Rastorgueva-Foi, Elizaveta, Sergeev, Sergey, Tornikoski, Merja, Troitsky, Ivan, Thum, Clemens, Wiesemeyer, Helmut
We present multi-wavelength studies of the radio galaxy 3C 120 and the blazar CTA 102 during unprecedented gamma-ray flares for both sources. In both studies the analysis of gamma-ray data has been compared with a series of 43 GHz VLBA images from th
Externí odkaz:
http://hdl.handle.net/10150/622695
http://arizona.openrepository.com/arizona/handle/10150/622695
http://arizona.openrepository.com/arizona/handle/10150/622695
Autor:
Emami, Razieh, Tiede, Paul, Doeleman, Sheperd S., Roelofs, Freek, Wielgus, Maciek, Blackburn, Lindy, Liska, Matthew, Chatterjee, Koushik, Ripperda, Bart, Fuentes, Antonio, Broderick, Avery, Hernquist, Lars, Alcock, Charles, Narayan, Ramesh, Smith, Randall, Tremblay, Grant, Ricarte, Angelo, Sun, He, Anantua, Richard, Kovalev, Yuri Y., Natarajan, Priyamvada, Vogelsberger, Mark
We propose to trace the dynamical motion of a shearing hot spot near the SgrA* source through a dynamical image reconstruction algorithm, StarWarps. Such a hot spot may form as the exhaust of magnetic reconnection in a current sheet near the black ho
Externí odkaz:
http://arxiv.org/abs/2211.06773
Publikováno v:
Galaxies 11 (2023) 5
The Event Horizon Telescope (EHT) Collaboration has successfully produced images of two supermassive black holes, enabling novel tests of black holes and their accretion flows on horizon scales. The EHT has so far published total intensity and linear
Externí odkaz:
http://arxiv.org/abs/2211.03907