Results 11 to 20 of about 292,162 (290)

Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A ∗ [PDF]

Classical and quantum gravity, 2022
Horizon-scale images of black holes (BHs) and their shadows have opened an unprecedented window onto tests of gravity and fundamental physics in the strong-field regime.
S. Vagnozzi, Rittick Roy, Yu-Dai Tsai, L. Visinelli   +3 more
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First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole [PDF]

Astrophysical Journal Letters, 2022
We present the first event-horizon-scale images and spatiotemporal analysis of Sgr A* taken with the Event Horizon Telescope in 2017 April at a wavelength of 1.3 mm.
Event Horizon Telescope Collaboration, K. Akiyama, A. Alberdi, W. Alef, J. Algaba, R. Anantua, K. Asada, R. Azulay, U. Bach, A. Baczko, D. Ball, M. Baloković, J. Barrett, M. Bauböck, B. Benson, D. Bintley, L. Blackburn, R. Blundell, K. Bouman, G. Bower, H. Boyce, M. Bremer, C. Brinkerink, R. Brissenden, S. Britzen, A. Broderick, D. Broguiere, T. Bronzwaer, S. Bustamante, D. Byun, J. Carlstrom, C. Ceccobello, A. Chael, Chi-kwan Chan, K. Chatterjee, S. Chatterjee, Ming-Tang Chen, Y. Chen 陈, Xiaopeng Cheng, I. Cho, P. Christian, N. S. Conroy, J. Conway, J. Cordes, T. Crawford, G. Crew, A. Cruz-Osorio, Y. Cui 崔, J. Davelaar, M. De Laurentis, R. Deane, J. Dempsey, G. Desvignes, J. Dexter, V. Dhruv, S. Doeleman, S. Dougal, S. Dzib, R. Eatough, R. Emami, H. Falcke, J. Farah, V. Fish, E. Fomalont, H. Ford, R. Fraga-Encinas, W. T. Freeman, P. Friberg, C. Fromm, A. Fuentes, P. Galison, C. Gammie, R. García, O. Gentaz, B. Georgiev, C. Goddi, R. Gold, A. Gómez-Ruiz, J. Gómez, M. Gu 顾, M. Gurwell, K. Hada, D. Haggard, K. Haworth, M. Hecht, R. Hesper, D. Heumann, L. Ho 何, P. Ho, M. Honma, Chih-Wei L. Huang, L. Huang 黄, D. Hughes, Shiro Ikeda, C. Impellizzeri, M. Inoue, S. Issaoun, D. James, B. Jannuzi, M. Janssen, B. Jeter, Wu 悟 Jiang 江, A. Jiménez-Rosales, Michael D. Johnson, S. Jorstad, A. Joshi, T. Jung, M. Karami, R. Karuppusamy, T. Kawashima, G. Keating, M. Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, M. Kino, J. Koay, Prashant Kocherlakota, Y. Kofuji, P. Koch, S. Koyama, C. Kramer, M. Kramer, T. Krichbaum, C. Kuo, N. L. Bella, T. Lauer, Daeyoung Lee, Sang-Sung Lee, P. Leung, A. Levis, Z. Li 李, R. Lico, Greg Lindahl, M. Lindqvist, M. Lisakov, J. Liu 刘, Kuo Liu, E. Liuzzo, Wen-Ping Lo, A. Lobanov, L. Loinard, C. Lonsdale, R. Lu 路, J. Mao 毛, N. Marchili, S. Markoff, D. Marrone, A. Marscher, I. Martí-Vidal, S. Matsushita, L. Matthews, L. Medeiros, K. Menten, D. Michalik, I. Mizuno, Y. Mizuno, J. Moran, K. Moriyama, M. Mościbrodzka, C. Müller, A. Mus, G. Musoke, I. Myserlis, A. Nadolski, H. Nagai, N. Nagar, M. Nakamura, R. Narayan, G. Narayanan, I. Natarajan, A. Nathanail, S. N. Fuentes, J. Neilsen, R. Neri, C. Ni, A. Noutsos, M. Nowak, Junghwan Oh, H. Okino, H. Olivares, G. Ortiz-Léon, T. Oyama, F. Özel, D. Palumbo, G. Paraschos, Jongho Park, H. Parsons, N. Patel, U. Pen, D. Pesce, V. Piétu, R. Plambeck, A. PopStefanija, O. Porth, F. M. Pötzl, B. Prather, J. A. Preciado-López, D. Psaltis, Hung-Yi Pu, V. Ramakrishnan, R. Rao, M. Rawlings, A. Raymond, L. Rezzolla, A. Ricarte, B. Ripperda, F. Roelofs, A. Rogers, E. Ros, C. Romero-Cañizales, A. Roshanineshat, H. Rottmann, A. Roy, I. Ruiz, C. Ruszczyk, K. Rygl, S. Sánchez, D. Sánchez-Argüelles, M. Sánchez-Portal, M. Sasada, K. Satapathy, T. Savolainen, F. Schloerb, J. Schonfeld, K. Schuster, Lijing Shao, Z. Shen 沈, D. Small, B. Sohn, J. SooHoo, K. Souccar, H. Sun 孙, F. Tazaki, A. Tetarenko, P. Tiede, R. Tilanus, M. Titus, P. Torne, E. Traianou, T. Trent, S. Trippe, Matthew A. Turk, I. van Bemmel, H. V. van Langevelde, D. V. van Rossum, J. Vos, J. Wagner, D. Ward-Thompson, J. Wardle, J. Weintroub, N. Wex, R. Wharton, M. Wielgus, K. Wiik, G. Witzel, M. Wondrak, G. Wong, Q. Wu 吴, P. Yamaguchi, D. Yoon, A. Young, K. Young, Z. Younsi, F. Yuan 袁, Y. Yuan 袁, J. Zensus, Shuo Zhang, Guangyao Zhao, S. Zhao 赵   +270 more
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Energy Spectra of Atmospheric Turbulence for Calculating $C_n^2$ Parameter. I. Maidanak and Suffa Observatories in Uzbekistan

Atmosphere, 2021
Knowledge of the turbulence spectra is of interest for describing atmospheric conditions as applied to astronomical observations. This article discusses the deformations of the turbulence spectra with heights in a wide range of scales at the sites of the
Artem Yu. Shikhovtsev, Pavel G. Kovadlo, Evgeniy A. Kopylov, Mansur A. Ibrahimov, Shuhrat A. Ehgamberdiev, Yusufjon A. Tillayev   +5 more
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First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon [PDF]

Astrophysical Journal Letters, 2021
Event Horizon Telescope (EHT) observations at 230 GHz have now imaged polarized emission around the supermassive black hole in M87 on event-horizon scales.
Kazunori Akiyama, J. Algaba, A. Alberdi, W. Alef, R. Anantua, K. Asada, R. Azulay, A. Baczko, D. Ball, M. Baloković, J. Barrett, B. Benson, D. Bintley, L. Blackburn, R. Blundell, W. Boland, K. Bouman, G. Bower, H. Boyce, M. Bremer, C. Brinkerink, R. Brissenden, S. Britzen, A. Broderick, D. Broguiere, T. Bronzwaer, D. Byun, J. Carlstrom, A. Chael, Chi-kwan Chan, S. Chatterjee, K. Chatterjee, Ming-Tang Chen, Yongjun Chen, P. Chesler, I. Cho, P. Christian, J. Conway, J. Cordes, T. Crawford, G. Crew, A. Cruz-Osorio, Yuzhu Cui, J. Davelaar, M. De Laurentis, R. Deane, J. Dempsey, G. Desvignes, J. Dexter, S. Doeleman, R. Eatough, H. Falcke, J. Farah, V. Fish, E. Fomalont, H. A. Ford, R. Fraga-Encinas, P. Friberg, C. Fromm, A. Fuentes, P. Galison, C. Gammie, Roberto García, Z. Gelles, O. Gentaz, B. Georgiev, C. Goddi, R. Gold, J. L. Gómez, A. I. Gómez-Ruiz, Minfeng Gu, M. Gurwell, K. Hada, Daryl Haggard, M. Hecht, R. Hesper, E. Himwich, L. C. Ho, P. Ho, M. Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, S. Ikeda, Makoto Inoue, S. Issaoun, D. J. James, B. Jannuzi, M. Janssen, B. Jeter, Wu Jiang, A. Jiménez-Rosales, Michael D. Johnson, S. Jorstad, T. Jung, M. Karami, R. Karuppusamy, T. Kawashima, G. Keating, M. Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, M. Kino, J. Koay, Y. Kofuji, P. M. Koch, S. Koyama, Michael Kramer, C. Kramer, T. Krichbaum, C. Kuo, T. Lauer, Sang-Sung Lee, A. Levis, Yan-Rong Li, Zhi-Yun Li, M. Lindqvist, R. Lico, Greg Lindahl, Jun Liu, Kuo Liu, E. Liuzzo, Wen-Ping Lo, A. Lobanov, L. Loinard, C. Lonsdale, Ruohan Lu, N. MacDonald, J. Mao, N. Marchili, S. Markoff, D. Marrone, A. Marscher, I. Martí-Vidal, S. Matsushita, L. Matthews, L. Medeiros, K. Menten, I. Mizuno, Y. Mizuno, J. M. Moran, K. Moriyama, M. Mościbrodzka, C. Müller, G. Musoke, A. Mejías, D. Michalik, A. Nadolski, H. Nagai, N. Nagar, M. Nakamura, Ramesh Narayan, G. Narayanan, I. Natarajan, A. Nathanail, J. Neilsen, R. Neri, C. Ni, A. Noutsos, M. Nowak, H. Okino, H. Olivares, G. Ortiz-Léon, T. Oyama, F. Özel, D. Palumbo, Jongho Park, N. Patel, U. Pen, D. Pesce, V. Piétu, R. Plambeck, A. PopStefanija, O. Porth, F. M. Pötzl, B. Prather, J. A. Preciado-López, D. Psaltis, Hung-Yi Pu, V. Ramakrishnan, R. Rao, M. Rawlings, A. Raymond, L. Rezzolla, A. Ricarte, B. Ripperda, F. Roelofs, Alan Rogers, Eduardo Ros, M. Rose, A. Roshanineshat, H. Rottmann, A. Roy, C. Ruszczyk, K. Rygl, Salvador Sánchez, D. Sánchez-Arguelles, M. Sasada, T. Savolainen, F. Schloerb, K. Schuster, Lijing Shao, Zhiqiang Shen, D. Small, B. Sohn, J. SooHoo, He Sun, F. Tazaki, A. Tetarenko, P. Tiede, R. Tilanus, M. Titus, K. Toma, P. Torne, T. Trent, E. Traianou, S. Trippe, I. Bemmel, H. V. van Langevelde, D. V. van Rossum, J. Wagner, D. Ward-Thompson, J. Wardle, J. Weintroub, N. Wex, R. Wharton, M. Wielgus, G. Wong, Qingwen Wu, D. Yoon, A. Young, K. Young, Z. Younsi, F. Yuan, Ye-Fei Yuan, J. A. Zensus, Guangyao Zhao, Shanwei Zhao   +239 more
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First M87 Event Horizon Telescope Results. VII. Polarization of the Ring [PDF]

Astrophysical Journal Letters, 2021
In 2017 April, the Event Horizon Telescope (EHT) observed the near-horizon region around the supermassive black hole at the core of the M87 galaxy. These 1.3 mm wavelength observations revealed a compact asymmetric ring-like source morphology.
K. Akiyama, J. Algaba, A. Alberdi, W. Alef, R. Anantua, K. Asada, R. Azulay, A. Baczko, D. Ball, M. Baloković, J. Barrett, B. Benson, D. Bintley, L. Blackburn, R. Blundell, W. Boland, K. Bouman, G. Bower, H. Boyce, M. Bremer, C. Brinkerink, R. Brissenden, S. Britzen, A. Broderick, D. Broguiere, T. Bronzwaer, D. Byun, J. Carlstrom, A. Chael, Chi-kwan Chan, S. Chatterjee, K. Chatterjee, Ming-Tang Chen, Y. Chen 陈, P. Chesler, I. Cho, P. Christian, J. Conway, J. Cordes, T. Crawford, G. Crew, A. Cruz-Osorio, Yuzhu Cui, J. Davelaar, M. De Laurentis, R. Deane, J. Dempsey, G. Desvignes, J. Dexter, S. Doeleman, R. Eatough, H. Falcke, J. Farah, V. Fish, E. Fomalont, H. Ford, R. Fraga-Encinas, W. Freeman, P. Friberg, C. Fromm, A. Fuentes, P. Galison, C. Gammie, R. García, O. Gentaz, B. Georgiev, C. Goddi, R. Gold, J. Gómez, A. Gómez-Ruiz, M. Gu 顾, M. Gurwell, K. Hada, D. Haggard, M. Hecht, R. Hesper, L. Ho 何, P. Ho, M. Honma, Chih-Wei L. Huang, L. Huang 黄, D. Hughes, Shiro Ikeda, M. Inoue, S. Issaoun, D. James, B. Jannuzi, M. Janssen, B. Jeter, Wu 悟 Jiang 江, A. Jiménez-Rosales, Michael D. Johnson, S. Jorstad, T. Jung, M. Karami, R. Karuppusamy, T. Kawashima, G. Keating, M. Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, M. Kino, J. Koay, Y. Kofuji, P. Koch, S. Koyama, M. Kramer, C. Kramer, T. Krichbaum, C. Kuo, T. Lauer, Sang-Sung Lee, A. Levis, Y. Li 李, Z. Li 李, M. Lindqvist, R. Lico, Greg Lindahl, J. Liu 刘, Kuo Liu, E. Liuzzo, Wen-Ping Lo, A. Lobanov, L. Loinard, C. Lonsdale, R. Lu 路, N. MacDonald, J. Mao 毛, N. Marchili, S. Markoff, D. Marrone, A. Marscher, I. Martí-Vidal, S. Matsushita, L. Matthews, L. Medeiros, K. Menten, I. Mizuno, Y. Mizuno, J. Moran, K. Moriyama, M. Mościbrodzka, C. Müller, G. Musoke, A. Mejías, D. Michalik, A. Nadolski, H. Nagai, N. Nagar, M. Nakamura, R. Narayan, G. Narayanan, I. Natarajan, A. Nathanail, J. Neilsen, R. Neri, C. Ni, A. Noutsos, M. Nowak, H. Okino, H. Olivares, G. Ortiz-Léon, T. Oyama, F. Özel, D. Palumbo, Jongho Park, N. Patel, U. Pen, D. Pesce, V. Piétu, R. Plambeck, A. PopStefanija, O. Porth, F. M. Pötzl, B. Prather, J. A. Preciado-López, D. Psaltis, Hung-Yi Pu, V. Ramakrishnan, R. Rao, M. Rawlings, A. Raymond, L. Rezzolla, A. Ricarte, B. Ripperda, F. Roelofs, A. Rogers, E. Ros, M. Rose, A. Roshanineshat, H. Rottmann, A. Roy, C. Ruszczyk, K. Rygl, S. Sánchez, D. Sánchez-Arguelles, M. Sasada, T. Savolainen, F. Schloerb, K. Schuster, Lijing Shao, Z. Shen 沈, D. Small, B. Sohn, J. SooHoo, H. Sun 孙, F. Tazaki, A. Tetarenko, P. Tiede, R. Tilanus, M. Titus, K. Toma, P. Torne, T. Trent, E. Traianou, S. Trippe, I. Bemmel, H. V. van Langevelde, D. V. van Rossum, J. Wagner, D. Ward-Thompson, J. Wardle, J. Weintroub, N. Wex, R. Wharton, M. Wielgus, G. Wong, Q. Wu 吴, D. Yoon, A. Young, K. Young, Z. Younsi, F. Yuan 袁, Y. Yuan 袁, J. Zensus, Guangyao Zhao, Shan-Shan Zhao   +238 more
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First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole [PDF]

, 2019
When surrounded by a transparent emission region, black holes are expected to reveal a dark shadow caused by gravitational light bending and photon capture at the event horizon.
The Event Horizon Telescope Collaboration
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In-flight performance and calibration of the Infrared Array Camera (IRAC) for the Spitzer Space Telescope [PDF]

SPIE Astronomical Telescopes + Instrumentation, 2004
The Infrared Array Camera (IRAC) is one of three focal plane instruments on board the Spitzer Space Telescope. IRAC is a four-channel camera that obtains simultaneous broad-band images at 3.6, 4.5, 5.8, and 8.0 μm in two nearly adjacent fields of view ...
G. Fazio, J. Hora, L. E. Allen, M. Ashby, P. Barmby, L. Deutsch, J.-S. Huang, S. Kleiner, M. Marengo, S. Megeath, G. Melnick, M. Pahre, B. Patten, J. Polizotti, H. Smith, R. Taylor, Z. Wang, S. Willner, W. Hoffmann, J. Pipher, W. Forrest, C. W. McMurty, C. Mccreight, M. Mckelvey, R. Mcmurray, D. Koch, S. Moseley, R. Arendt, J. Mentzell, C. Marx, P. Losch, P. Mayman, W. Eichhorn, D. Krebs, M. Jhabvala, D. Gezari, D. Fixsen, J. Flores, K. Shakoorzadeh, R. Jungo, C. Hakun, L. Workman, G. Karpati, R. Kichak, R. Whitley, S. Mann, E. Tollestrup, P. Eisenhardt, D. Stern, V. Gorjian, B. Bhattacharya, S. Carey, B. Nelson, W. Glaccum, M. Lacy, P. Lowrance, S. Laine, W. Reach, J. A. Stauffer, J. Surace, G. Wilson, E. L. Wright, A. Hoffman, G. Domingo, M. Cohen   +64 more
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First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass [PDF]

Astrophysical Journal Letters, 2022
In this paper we quantify the temporal variability and image morphology of the horizon-scale emission from Sgr A*, as observed by the EHT in 2017 April at a wavelength of 1.3 mm. We find that the Sgr A* data exhibit variability that exceeds what can be
Event Horizon Telescope Collaboration, K. Akiyama, A. Alberdi, W. Alef, J. Algaba, R. Anantua, K. Asada, R. Azulay, U. Bach, A. Baczko, D. Ball, M. Baloković, J. Barrett, M. Bauböck, B. Benson, D. Bintley, L. Blackburn, R. Blundell, K. Bouman, G. Bower, H. Boyce, M. Bremer, C. Brinkerink, R. Brissenden, S. Britzen, A. Broderick, D. Broguiere, T. Bronzwaer, S. Bustamante, D. Byun, J. Carlstrom, C. Ceccobello, A. Chael, Chi-kwan Chan, K. Chatterjee, S. Chatterjee, Ming-Tang Chen, Y. Chen 陈, Xiaopeng Cheng, I. Cho, P. Christian, N. S. Conroy, J. Conway, J. Cordes, T. Crawford, G. Crew, A. Cruz-Osorio, Y. Cui 崔, J. Davelaar, M. Laurentis, R. Deane, J. Dempsey, G. Desvignes, J. Dexter, V. Dhruv, S. Doeleman, S. Dougal, S. Dzib, R. Eatough, R. Emami, H. Falcke, J. Farah, V. Fish, E. Fomalont, H. Ford, R. Fraga-Encinas, W. T. Freeman, P. Friberg, C. Fromm, A. Fuentes, P. Galison, C. Gammie, R. García, O. Gentaz, B. Georgiev, C. Goddi, R. Gold, A. Gómez-Ruiz, J. Gómez, M. Gu 顾, M. Gurwell, K. Hada, D. Haggard, K. Haworth, M. Hecht, R. Hesper, D. Heumann, L. Ho 何, P. Ho, M. Honma, Chih-Wei L. Huang, L. Huang 黄, D. Hughes, Shiro Ikeda, C. Impellizzeri, M. Inoue, S. Issaoun, D. James, B. Jannuzi, M. Janssen, B. Jeter, Wu 悟 Jiang 江, A. Jiménez-Rosales, Michael D. Johnson, S. Jorstad, A. Joshi, T. Jung, M. Karami, R. Karuppusamy, T. Kawashima, G. Keating, M. Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, M. Kino, J. Koay, Prashant Kocherlakota, Y. Kofuji, P. Koch, S. Koyama, C. Kramer, M. Kramer, T. Krichbaum, C. Kuo, N. L. Bella, T. Lauer, Daeyoung Lee, Sang-Sung Lee, P. Leung, A. Levis, Z. Li 李, R. Lico, Greg Lindahl, M. Lindqvist, M. Lisakov, J. Liu 刘, Kuo Liu, E. Liuzzo, Wen-Ping Lo, A. Lobanov, L. Loinard, C. Lonsdale, R. Lu 路, J. Mao 毛, N. Marchili, S. Markoff, D. Marrone, A. Marscher, I. Martí-Vidal, S. Matsushita, L. Matthews, L. Medeiros, K. Menten, D. Michalik, I. Mizuno, Y. Mizuno, J. Moran, K. Moriyama, M. Mościbrodzka, C. Müller, A. Mus, G. Musoke, I. Myserlis, A. Nadolski, H. Nagai, N. Nagar, M. Nakamura, R. Narayan, G. Narayanan, I. Natarajan, A. Nathanail, S. N. Fuentes, J. Neilsen, R. Neri, C. Ni, A. Noutsos, M. Nowak, Junghwan Oh, H. Okino, H. Olivares, G. Ortiz-Léon, T. Oyama, D. Palumbo, G. Paraschos, Jongho Park, H. Parsons, N. Patel, U. Pen, D. Pesce, V. Piétu, R. Plambeck, A. PopStefanija, O. Porth, F. M. Pötzl, B. Prather, J. A. Preciado-López, Hung-Yi Pu, V. Ramakrishnan, R. Rao, M. Rawlings, A. Raymond, L. Rezzolla, A. Ricarte, B. Ripperda, F. Roelofs, A. Rogers, E. Ros, C. Romero-Cañizales, A. Roshanineshat, H. Rottmann, A. Roy, I. Ruiz, C. Ruszczyk, K. Rygl, S. Sánchez, D. Sánchez-Argüelles, M. Sánchez-Portal, M. Sasada, K. Satapathy, T. Savolainen, F. Schloerb, J. Schonfeld, K. Schuster, Lijing Shao, Z. Shen 沈, D. Small, B. Sohn, J. SooHoo, K. Souccar, H. Sun 孙, F. Tazaki, A. Tetarenko, P. Tiede, R. Tilanus, M. Titus, P. Torne, E. Traianou, T. Trent, S. Trippe, Matthew A. Turk, I. van Bemmel, H. V. van Langevelde, D. V. van Rossum, J. Vos, J. Wagner, D. Ward-Thompson, J. Wardle, J. Weintroub, N. Wex, R. Wharton, M. Wielgus, K. Wiik, G. Witzel, M. Wondrak, G. Wong, Q. Wu 吴, P. Yamaguchi, D. Yoon, A. Young, K. Young, Z. Younsi, F. Yuan 袁, Y. Yuan 袁, J. Zensus, Shuo Zhang, Guangyao Zhao, S. Zhao 赵, Dominic O. Chang   +269 more
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The First Telescope in the Korean History I. Translation of Jeong`s Report [PDF]

Journal of Astronomy and Space Sciences, 2009
In 1631 A.D. Jeong Duwon, an ambassador of the Joseon dynasty was sent to the Ming dynasty. There he met João Rodrigues, a Jesuit missionary, in Dengzhou of Shandong peninsula.
Sang-Hyeon Ahn
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Baccio del Bianco and the artistic fortuna of Galileo’s Il Saggiatore

Galilæana, 2023
This contribution takes into consideration Galileo’s Il Saggiatore as an overlooked source for the arts in Florence during the first part of the seventeenth century.
Eva Struhal
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