Zobrazeno 1 - 10
of 903
pro vyhledávání: '"A. C. S Readhead"'
Autor:
Nitika Yadlapalli Yurk, Vikram Ravi, Mark W. Hodges, James W. Lamb, Richard Hobbs, David P. Woody, Anthony C. S. Readhead
Publikováno v:
The Astronomical Journal, Vol 168, Iss 4, p 168 (2024)
Though the time-domain millimeter sky is yet to be well characterized, the scarcity of millimeter observing resources in the world at present hampers progress toward it. In efforts to bolster the exploration of millimeter transients, we present the S
Externí odkaz:
https://doaj.org/article/7a6ec236f99e4292a4d024865317d31b
Autor:
Hai Lei, Ying-Kang Zhang, Xiong Jiang, S. Kiehlmann, A. C. S. Readhead, Liang Chen, Neng-Hui Liao, Tao An
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 185 (2024)
High-redshift ( z > 3) γ -ray blazars are rare, but they are crucial for our understanding of jet evolution, γ -ray production and propagation, and the growth of supermassive black holes in the early Universe. A new analysis of Fermi-LAT data revea
Externí odkaz:
https://doaj.org/article/d6044934a78f405090d6d3435c3b1fca
Autor:
Delaney A. Dunne, Kieran A. Cleary, Patrick C. Breysse, Dongwoo T. Chung, Håvard T. Ihle, J. Richard Bond, Hans Kristian Eriksen, Joshua Ott Gundersen, Laura C. Keating, Junhan Kim, Jonas Gahr Sturtzel Lunde, Norman Murray, Hamsa Padmanabhan, Liju Philip, Nils-Ole Stutzer, Doğa Tolgay, Ingunn Katherine Wehus, Sarah E. Church, Todd Gaier, Andrew I. Harris, Richard Hobbs, James W. Lamb, Charles R. Lawrence, Anthony C. S. Readhead, David P. Woody
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 1, p 7 (2024)
We present a new upper limit on the cosmic molecular gas density at z = 2.4–3.4 obtained using the first year of observations from the CO Mapping Array Project (COMAP). COMAP data cubes are stacked on the 3D positions of 243 quasars selected from t
Externí odkaz:
https://doaj.org/article/158a3a89d39041fb9f29208c73a629e2
Autor:
A. Albert, S. Alves, M. André, M. Ardid, S. Ardid, J.-J. Aubert, J. Aublin, B. Baret, S. Basa, Y. Becherini, B. Belhorma, M. Bendahman, F. Benfenati, V. Bertin, S. Biagi, M. Bissinger, J. Boumaaza, M. Bouta, M. C. Bouwhuis, H. Brânzaş, R. Bruijn, J. Brunner, J. Busto, B. Caiffi, D. Calvo, S. Campion, A. Capone, L. Caramete, F. Carenini, J. Carr, V. Carretero, S. Celli, L. Cerisy, M. Chabab, R. Cherkaoui El Moursli, T. Chiarusi, M. Circella, J. A. B. Coelho, A. Coleiro, R. Coniglione, P. Coyle, A. Creusot, A. S. M. Cruz, A. F. Díaz, B. De Martino, C. Distefano, I. Di Palma, A. Domi, C. Donzaud, D. Dornic, D. Drouhin, T. Eberl, T. van Eeden, D. van Eijk, S. El Hedri, N. El Khayati, A. Enzenhöfer, P. Fermani, G. Ferrara, F. Filippini, L. Fusco, S. Gagliardini, J. García, C. Gatius Oliver, P. Gay, N. Geißelbrecht, H. Glotin, R. Gozzini, R. Gracia Ruiz, K. Graf, C. Guidi, L. Haegel, S. Hallmann, H. van Haren, A. J. Heijboer, Y. Hello, J. J. Hernández-Rey, J. Hößl, J. Hofestädt, F. Huang, G. Illuminati, C. W. James, B. Jisse-Jung, M. de Jong, P. de Jong, M. Kadler, O. Kalekin, U. Katz, A. Kouchner, Y. A Kovalev, Y. Y Kovalev, I. Kreykenbohm, V. Kulikovskiy, R. Lahmann, M. Lamoureux, A. Lazo, D. Lefèvre, E. Leonora, G. Levi, S. Le Stum, D. Lopez-Coto, S. Loucatos, L. Maderer, J. Manczak, M. Marcelin, A. Margiotta, A. Marinelli, J. A. Martínez-Mora, P. Migliozzi, A. Moussa, R. Muller, S. Navas, E. Nezri, B. Ó Fearraigh, E. Oukacha, A. Păun, G. E. Păvălaş, S. Peña-Martínez, M. Perrin-Terrin, V. Pestel, P. Piattelli, A. Plavin, C. Poirè, V. Popa, T. Pradier, A. Pushkarev, N. Randazzo, D. Real, S. Reck, G. Riccobene, A. Romanov, A. Sánchez-Losa, A. Saina, F. Salesa Greus, D. F. E. Samtleben, M. Sanguineti, P. Sapienza, J. Schnabel, J. Schumann, F. Schüssler, J. Seneca, M. Spurio, Th. Stolarczyk, M. Taiuti, Y. Tayalati, S. J. Tingay, S. Troitsky, B. Vallage, G. Vannoye, V. Van Elewyck, S. Viola, D. Vivolo, J. Wilms, S. Zavatarelli, A. Zegarelli, J. D. Zornoza, J. Zúñiga, ANTARES Collaboration, T. Hovatta, S. Kiehlmann, I. Liodakis, V. Pavlidou, A. C. S Readhead, OVRO Collaboration
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 3 (2024)
Active galaxies, especially blazars, are among the most promising extragalactic candidates for high-energy neutrino sources. To date, ANTARES searches included these objects and used GeV–TeV γ -ray flux to select blazars. Here, a statistically com
Externí odkaz:
https://doaj.org/article/f2df9993f9414faa82a914797a85b37e
Autor:
A. C. S Readhead, V. Ravi, R. D. Blandford, A. G. Sullivan, J. Somalwar, M. C. Begelman, M. Birkinshaw, I. Liodakis, M. L. Lister, T. J. Pearson, G. B. Taylor, P. N. Wilkinson, N. Globus, S. Kiehlmann, C. R. Lawrence, D. Murphy, S. O’Neill, V. Pavlidou, E. Sheldahl, A. Siemiginowska, K. Tassis
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 242 (2024)
We use a sample of 54 compact symmetric objects (CSOs) to confirm that there are two unrelated CSO classes: an edge-dimmed, low-luminosity class (CSO 1), and an edge-brightened, high-luminosity class (CSO 2). Using blind tests, we show that CSO 2s co
Externí odkaz:
https://doaj.org/article/02064a117a3345868f790e61f53e83cf
Autor:
S. Kiehlmann, M. L. Lister, A. C. S Readhead, I. Liodakis, Sandra O’Neill, T. J. Pearson, Evan Sheldahl, Aneta Siemiginowska, K. Tassis, G. B. Taylor, P. N. Wilkinson
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 240 (2024)
Compact symmetric objects (CSOs) are jetted active galactic nuclei (AGN) with overall projected size 700 mJy is between (6.8 ± 1.6)% and (8.5 ± 1.8)%.
Externí odkaz:
https://doaj.org/article/4673032416ce4c5d80e7eec6bd30f210
Autor:
S. Kiehlmann, A. C. S. Readhead, S. O’Neill, P. N. Wilkinson, M. L. Lister, I. Liodakis, S. Bruzewski, V. Pavlidou, T. J. Pearson, E. Sheldahl, A. Siemiginowska, K. Tassis, G. B. Taylor
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 241 (2024)
Compact symmetric objects (CSOs) are compact (99%) of CSO 2s do not evolve into larger-scale radio sources. These CSO 2s belong to a distinct population of jetted AGN, which should be characterized as “short-lived,” as opposed to “young,” com
Externí odkaz:
https://doaj.org/article/9ec3739c56de4661abd0569f7e47dcff
Autor:
A. Acharyya, C. B. Adams, A. Archer, P. Bangale, W. Benbow, A. Brill, J. L. Christiansen, A. J. Chromey, M. Errando, A. Falcone, Q. Feng, J. P. Finley, G. M. Foote, L. Fortson, A. Furniss, G. Gallagher, W. Hanlon, D. Hanna, O. Hervet, C. E. Hinrichs, J. Hoang, J. Holder, W. Jin, M. N. Johnson, P. Kaaret, M. Kertzman, D. Kieda, T. K. Kleiner, N. Korzoun, F. Krennrich, M. J. Lang, M. Lundy, G. Maier, C. E McGrath, M. J. Millard, J. Millis, C. L. Mooney, P. Moriarty, R. Mukherjee, S. O’Brien, R. A. Ong, M. Pohl, E. Pueschel, J. Quinn, K. Ragan, P. T. Reynolds, D. Ribeiro, E. Roache, I. Sadeh, A. C. Sadun, L. Saha, M. Santander, G. H. Sembroski, R. Shang, M. Splettstoesser, A. K. Talluri, J. V. Tucci, V. V. Vassiliev, D. A. Williams, S. L. Wong, The VERITAS Collaboration, Talvikki Hovatta, Svetlana G. Jorstad, Sebastian Kiehlmann, Anne Lähteenmäki, Ioannis Liodakis, Alan P. Marscher, Walter Max-Moerbeck, Anthony C. S. Readhead, Rodrigo Reeves, Paul S. Smith, Merja Tornikoski
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 2, p 152 (2023)
We report the detection of very high energy gamma-ray emission from the blazar S3 1227+25 (VER J1230+253) with the Very Energetic Radiation Imaging Telescope Array System (VERITAS). VERITAS observations of the source were triggered by the detection o
Externí odkaz:
https://doaj.org/article/04ea3150d4504f4d96c295106d36fb55
Autor:
H. Abe, S. Abe, V. A. Acciari, I. Agudo, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Arbet-Engels, C. Arcaro, M. Artero, K. Asano, D. Baack, A. Babić, A. Baquero, U. Barres de Almeida, J. A. Barrio, I. Batković, J. Baxter, J. Becerra González, W. Bednarek, E. Bernardini, M. Bernardos, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, Ž. Bošnjak, I. Burelli, G. Busetto, R. Carosi, M. Carretero-Castrillo, A. J. Castro-Tirado, G. Ceribella, Y. Chai, A. Chilingarian, S. Cikota, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D’Amico, V. D’Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, A. Del Popolo, M. Delfino, J. Delgado, C. Delgado Mendez, D. Depaoli, F. Di Pierro, L. Di Venere, E. Do Souto Espiñeira, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, D. Elsaesser, G. Emery, J. Escudero, V. Fallah Ramazani, L. Fariña, A. Fattorini, L. Foffano, L. Font, C. Fruck, S. Fukami, Y. Fukazawa, R. J. García López, M. Garczarczyk, S. Gasparyan, M. Gaug, J. G. Giesbrecht Paiva, N. Giglietto, F. Giordano, P. Gliwny, N. Godinović, R. Grau, D. Green, J. G. Green, D. Hadasch, A. Hahn, T. Hassan, L. Heckmann, J. Herrera, D. Hrupec, M. Hütten, R. Imazawa, T. Inada, R. Iotov, K. Ishio, I. Jiménez Martínez, J. Jormanainen, D. Kerszberg, Y. Kobayashi, H. Kubo, J. Kushida, A. Lamastra, D. Lelas, F. Leone, E. Lindfors, L. Linhoff, S. Lombardi, F. Longo, R. López-Coto, M. López-Moya, A. López-Oramas, S. Loporchio, A. Lorini, E. Lyard, B. Machado de Oliveira Fraga, P. Majumdar, M. Makariev, G. Maneva, N. Mang, M. Manganaro, S. Mangano, K. Mannheim, M. Mariotti, M. Martínez, A. Mas-Aguilar, D. Mazin, S. Menchiari, S. Mender, S. Mićanović, D. Miceli, T. Miener, J. M. Miranda, R. Mirzoyan, E. Molina, H. A. Mondal, A. Moralejo, D. Morcuende, V. Moreno, T. Nakamori, C. Nanci, L. Nava, V. Neustroev, M. Nievas Rosillo, C. Nigro, K. Nilsson, K. Nishijima, T. Njoh Ekoume, K. Noda, S. Nozaki, Y. Ohtani, T. Oka, A. Okumura, J. Otero-Santos, S. Paiano, M. Palatiello, D. Paneque, R. Paoletti, J. M. Paredes, L. Pavletić, M. Persic, M. Pihet, G. Pirola, F. Podobnik, P. G. Prada Moroni, E. Prandini, G. Principe, C. Priyadarshi, W. Rhode, M. Ribó, J. Rico, C. Righi, A. Rugliancich, N. Sahakyan, T. Saito, S. Sakurai, K. Satalecka, F. G. Saturni, B. Schleicher, K. Schmidt, F. Schmuckermaier, J. L. Schubert, T. Schweizer, J. Sitarek, V. Sliusar, D. Sobczynska, A. Spolon, A. Stamerra, J. Strišković, D. Strom, M. Strzys, Y. Suda, T. Surić, H. Tajima, M. Takahashi, R. Takeishi, F. Tavecchio, P. Temnikov, K. Terauchi, T. Terzić, M. Teshima, L. Tosti, S. Truzzi, A. Tutone, S. Ubach, J. van Scherpenberg, M. Vazquez Acosta, S. Ventura, V. Verguilov, I. Viale, C. F. Vigorito, V. Vitale, I. Vovk, R. Walter, M. Will, C. Wunderlich, T. Yamamoto, D. Zarić, The MAGIC Collaboration, M. Cerruti, J. A. Acosta-Pulido, G. Apolonio, R. Bachev, M. Baloković, E. Benítez, I. Björklund, V. Bozhilov, L. F. Brown, A. Bugg, W. Carbonell, M. I. Carnerero, D. Carosati, C. Casadio, W. Chamani, W. P. Chen, R. A. Chigladze, G. Damljanovic, K. Epps, A. Erkenov, M. Feige, J. Finke, A. Fuentes, K. Gazeas, M. Giroletti, T. S. Grishina, A. C. Gupta, M. A. Gurwell,, E. Heidemann, D. Hiriart, W. J. Hou, T. Hovatta, S. Ibryamov, M. D. Joner, S. G. Jorstad, J. Kania, S. Kiehlmann, G. N. Kimeridze, E. N. Kopatskaya, M. Kopp, M. Korte, B. Kotas, S. Koyama, J. A. Kramer, L. Kunkel, S. O. Kurtanidze, O. M. Kurtanidze, A. Lähteenmäki, J. M. López, V. M. Larionov, E. G. Larionova, L. V. Larionova, C. Leto, C. Lorey, R. Mújica, G. M. Madejski, N. Marchili, A. P. Marscher, M. Minev, A. Modaressi, D. A. Morozova, T. Mufakharov, I. Myserlis, A. A. Nikiforova, M. G. Nikolashvili, E. Ovcharov, M. Perri, C. M. Raiteri, A. C. S. Readhead, A. Reimer, D. Reinhart, S. Righini, K. Rosenlehner, A. C. Sadun, S. S. Savchenko, A. Scherbantin, L. Schneider, K. Schoch, D. Seifert, E. Semkov, L. A. Sigua, C. Singh, P. Sola, Y. Sotnikova, M. Spencer, R. Steineke, M. Stojanovic, A. Strigachev, M. Tornikoski, E. Traianou, A. Tramacere, Yu. V. Troitskaya, I. S. Troitskiy, J. B. Trump, A. Tsai, A. Valcheva, A. A. Vasilyev, F. Verrecchia, M. Villata, O. Vince, K. Vrontaki, Z. R. Weaver, E. Zaharieva, N. Zottmann
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 266, Iss 2, p 37 (2023)
We study the broadband emission of Mrk 501 using multiwavelength observations from 2017 to 2020 performed with a multitude of instruments, involving, among others, MAGIC, Fermi's Large Area Telescope (LAT), NuSTAR, Swift, GASP-WEBT, and the Owens Val
Externí odkaz:
https://doaj.org/article/effe791e7795408ebde669353f2928b3
Autor:
Stuart E Harper, Adam Barr, C Dickinson, M W Peel, Roke Cepeda-Arroita, C J Copley, R D P Grumitt, J Patrick Leahy, J L Jonas, Michael E Jones, J Leech, T J Pearson, A C S Readhead, Angela C Taylor
Publikováno v:
Monthly Notices of the Royal Astronomical Society.
The Andromeda galaxy (M31) is our closest neighbouring spiral galaxy, making it an ideal target for studying the physics of the interstellar medium in a galaxy very similar to our own. Using new observations of M31 at 4.76GHz by the C-Band All-Sky Su