Zobrazeno 1 - 10
of 144
pro vyhledávání: '"Tornikoski, Merja"'
Autor:
Foschini, Luigi, Barba, Benedetta Dalla, Tornikoski, Merja, Andernach, Heinz, Marziani, Paola, Marscher, Alan P., Jorstad, Svetlana G., Järvelä, Emilia, Antón, Sonia, Bontà, Elena Dalla
We present the results of a comparison between different methods to estimate the power of relativistic jets from active galactic nuclei (AGN). We selected a sample of 32 objects (21 flat-spectrum radio quasars, 7 BL Lacertae Objects, 2 misaligned AGN
Externí odkaz:
http://arxiv.org/abs/2403.17581
Context. Aalto University Mets\"ahovi Radio Observatory has collected solar intensity maps for over 45 years. Most data coverage is on the 37 GHz frequency band, tracking emissions primarily at the chromosphere and coronal transition region. The data
Externí odkaz:
http://arxiv.org/abs/2402.12849
Autor:
Cheong, Whee Yeon, Lee, Sang-Sung, Kim, Sang-Hyun, Kang, Sincheol, Kim, Jae Young, Rani, Bindu, Readhead, Anthony C. S., Kiehlmann, Sebastian, Lähteenmäki, Anne, Tornikoski, Merja, Tammi, Joni, Ramakrishnan, Venkatessh, Agudo, Iván, Fuentes, Antonio, Traianou, Efthalia, Escudero, Juan, Thum, Clemens, Myserlis, Ioannis, Casadio, Carolina, Gurwell, Mark
We present the multiwavelength flaring activity of the blazar AO 0235+164 during its recent active period from 2013 to 2019. From a discrete correlation function (DCF) analysis, we find a significant (>95%) correlation between radio and $\gamma$-ray
Externí odkaz:
http://arxiv.org/abs/2310.16296
Autor:
Valtonen, Mauri J., Zola, Staszek, Gopakumar, Achamveedu, Lähteenmäki, Anne, Tornikoski, Merja, Dey, Lankeswar, Gupta, Alok C., Pursimo, Tapio, Knudstrup, Emil, Gomez, Jose L., Hudec, Rene, Jelínek, Martin, Štrobl, Jan, Berdyugin, Andrei V., Ciprini, Stefano, Reichart, Daniel E., Kouprianov, Vladimir V., Matsumoto, Katsura, Drozdz, Marek, Mugrauer, Markus, Sadun, Alberto, Zejmo, Michal, Sillanpää, Aimo, Lehto, Harry J., Nilsson, Kari, Imazawa, Ryo, Uemura, Makoto, Davidson Jr, James W.
The highly variable blazar OJ~287 is commonly discussed as an example of a binary black hole system. The 130 year long optical light curve is well explained by a model where the central body is a massive black hole of 18.35$\times$10$^9$ solar mass t
Externí odkaz:
http://arxiv.org/abs/2308.03017
Autor:
Valtonen, Mauri J., Dey, Lankeswar, Gopakumar, Achamveedu, Zola, Staszek, Lähteenmäki, Anne, Tornikoski, Merja, Gupta, Alok C., Pursimo, Tapio, Knudstrup, Emil, Gomez, Jose L., Hudec, Rene, Jelínek, Martin, Štrobl, Jan, Berdyugin, Andrei V., Ciprini, Stefano, Reichart, Daniel E., Kouprianov, Vladimir V., Matsumoto, Katsura, Drozdz, Marek, Mugrauer, Markus, Sadun, Alberto, Zejmo, Michal, Sillanpää, Aimo, Lehto, Harry J., Nilsson, Kari, Imazawa, Ryo, Uemura, Makoto
We present a summary of the results of the OJ 287 observational campaign, which was carried out during the 2021/2022 observational season. This season is special in the binary model because the major axis of the precessing binary happens to lie almos
Externí odkaz:
http://arxiv.org/abs/2308.01878
Autor:
Yuan, Q., Kushwaha, Pankaj, Gupta, Alok C., Tripathi, Ashutosh, Wiita, Paul J., Zhang, M., Liu, X., Lahteenmaki, Anne, Tornikoski, Merja, Tammi, Joni, Ramakrishnan, Venkatessh, Cui, L., Wang, X., Gu, M. F., Bambi, Cosimo, Volvach, A. E.
We perform correlation and periodicity search analyses on long-term multi-band light curves of the FSRQ 1510-089 observed by the space-based Fermi--Large Area Telescope in gamma-rays, the SMARTS and Steward Observatory telescopes in optical and near-
Externí odkaz:
http://arxiv.org/abs/2306.10248
Autor:
Acharyya, Atreya, Adams, Colin, Archer, Avery, Bangale, Priyadarshini, Benbow, Wystan, Brill, Aryeh, Christiansen, Jodi, Chromey, Alisha, Errando, Manel, Falcone, Abe, Feng, Qi, Finley, John, Foote, Gregory, Fortson, Lucy, Furniss, Amy, Gallagher, Greg, Hanlon, William, Hanna, David, Hervet, Olivier, Hinrichs, Claire, Hoang, John, Holder, Jamie, Jin, Weidong, Johnson, Madalyn, Kaaret, Philip, Kertzman, Mary P., Kieda, David, Kleiner, Tobias, Korzoun, Nikolas, Krennrich, Frank, Lang, Mark, Lundy, Matthew, Maier, Gernot, McGrath, Conor, Millard, Matthew, Millis, John, Mooney, Connor, Moriarty, Patrick, Mukherjee, Reshmi, O'Brien, Stephan, Ong, Rene A., Pohl, Martin, Pueschel, Elisa, Quinn, John, Ragan, Kenneth J., Reynolds, Paul, Ribeiro, Deivid, Roache, Emmet Thomas, Sadeh, Iftach, Sadun, Alberto, Saha, Lab, Santander, Marcos, Sembroski, Glenn, Shang, Ruo, Splettstoesser, Megan, Talluri, Anjana, Tucci, James, Vassiliev, Vladimir, Williams, David, Wong, Sam, Hovatta, Talvikki, Jorstad, Svetlana, Kiehlmann, Sebastian, Lahteenmaki, Anne, Liodakis, Ioannis, Marscher, Alan, Max-Moerbeck, Walter, Readhead, Anthony, Reeves, Rodrigo, Smith, Paul S, Tornikoski, Merja
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:
http://arxiv.org/abs/2305.02860
Autor:
Valtonen, Mauri J., Zola, Staszek, Gopakumar, Lähteenmäki, Anne, Tornikoski, Merja, Dey, Lankeswar, Gupta, Alok C., Pursimo, Tapio, Knudstrup, Emil, Gomez, Jose L., Hudec, Rene, Jelínek, Martin, Štrobl, Jan, Berdyugin, Andrei V., Ciprini, Stefano, Reichart, Daniel E., Kouprianov, Vladimir V., Matsumoto, Katsura, Drozdz, Marek, Mugrauer, Markus, Sadun, Alberto, Zejmo, Michal, Sillanpää, Aimo, Lehto, Harry J., Nilsson, Kari, Imazawa, Ryo, Uemura, Makoto
The bright blazar OJ~287 routinely parades high brightness bremsstrahlung flares, which are explained as being a result of a secondary supermassive black hole (SMBH) impacting the accretion disc of a more massive primary SMBH in a binary system. The
Externí odkaz:
http://arxiv.org/abs/2303.15886
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:
Wang, Ailing, An, Tao, Guo, Shaoguang, Mohan, Prashanth, Chamani, Wara, Baan, Willem A., Hovatta, Talvikki, Falcke, Heino, Galvin, Tim J., Hurley-Walker, Natasha, Jaiswal, Sumit, Lahteenmaki, Anne, Lao, Baoqiang, Lv, Weijia, Tornikoski, Merja, Zhang, Yingkang
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 a radio-intermediate quasar III Zw 2. We detect two jet knots J1 and J2 on parsec sca
Externí odkaz:
http://arxiv.org/abs/2212.13735