Zobrazeno 1 - 10
of 2 408
pro vyhledávání: '"Mauri J"'
Autor:
Valtonen, Mauri J.
The quasar OJ~287 has shown large flares since 1888, following a pattern that arises in a supermassive black hole binary when the secondary hits the accretion disk of the primary, and releases a hot bubble of gas at every disk crossing. A complete ma
Externí odkaz:
http://arxiv.org/abs/2411.00908
Autor:
Valtonen, Mauri J., Zola, Staszek, Gupta, Alok C., Kishore, Shubham, Gopakumar, Achamveedu, Jorstad, Svetlana G., Wiita, Paul J., Gu, Minfeng, Nilsson, Kari, Marscher, Alan P., Zhang, Zhongli, Hudec, Rene, Matsumoto, Katsura, Drozdz, Marek, Ogloza, Waldemar, Berdyugin, Andrei V., Reichart, Daniel E., Mugrauer, Markus, Dey, Lankeswar, Pursimo, Tapio, Lehto, Harry J., Ciprini, Stefano, Nakaoka, T., Uemura, M., Imazawa, Ryo, Zejmo, Michal, Kouprianov, Vladimir V., Davidson, Jr., James W., Sadun, Alberto, Strobl, Jan, Weaver, Z. R., Jelinek, Martin
We report the study of a huge optical intraday flare on November 12, 2021, at 2 am UT, in the blazar OJ287. In the binary black hole model it is associated with an impact of the secondary black hole on the accretion disk of the primary. Our multifreq
Externí odkaz:
http://arxiv.org/abs/2405.08627
Autor:
Gupta, Alok C., Kushwaha, Pankaj, Valtonen, Mauri J., Savchenko, Sergey S., Jorstad, Svetlana G., Imazawa, Ryo, Wiita, Paul J., Gu, Minfeng, Marscher, Alan P., Zhang, Zhongli, Bachev, Rumen, Borman, G. A., Gaur, Haritma, Grishina, T. S., Hagen-Thorn, V. A., Kopatskaya, E. N., Larionov, V. M., Larionova, E. G., Larionova, L. V., Morozova, D. A., Nakaoka, T., Strigachev, A., Troitskaya, Yulia V., Troitsky, I. S., Uemura, M., Vasilyev, A. A., Weaver, Z. R., Zhovtan, A. V.
Publikováno v:
Astrophysical Journal Letters, 957 (2023) L11 (11pp)
We study the optical flux and polarization variability of the binary black hole blazar OJ 287 using quasi-simultaneous observations from 2015 to 2023 carried out using telescopes in the USA, Japan, Russia, Crimea, and Bulgaria. This is one of the mos
Externí odkaz:
http://arxiv.org/abs/2311.02372
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:
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:
Valtonen, Mauri J., Zola, Staszek, Gopakumar, A., McCall, Callum, Jermak, Helen, Dey, Lankeswar, Komossa, S., Pursimo, Tapio, Knudstrup, Emil, Grupe, Dirk, Gomez, Jose L., Hudec, Rene, Jelinek, Martin, Strobl, Jan, Berdyugin, Andrei V., Ciprini, Stefano, Reichart, Daniel E., Kouprianov, Vladimir V., Matsumoto, Katsura, Drozdz, Marek, Mugrauer, Markus, Sadun, Alberto, Zejmo, Michal, Sillanpaa, Aimo, Lehto, Harry J., Nilsson, Kari
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 disk of a primary SMBH in a binary system. We begin by showin
Externí odkaz:
http://arxiv.org/abs/2209.08360
Autor:
Valtonen, Mauri J., Dey, Lankeswar, Zola, S., Ciprini, S., Kidger, M., Pursimo, T., Gopakumar, A., Matsumoto, K., Sadakane, K., Caton, D. B., Nilsson, K., Komossa, S., Bagaglia, M., Baransky, A., Boumis, P., Boyd, D., Castro-Tirado, A. J., Debski, B., Drozdz, M., Pérez, A. Escartin, Fiorucci, M., Garcia, F., Gazeas, K., Ghosh, S., Godunova, V., Gomez, J. L., Gredel, R., Grupe, D., Haislip, J. B., Henning, T., Hurst, G., Janík, J., Kouprianov, V. V., Lehto, H., Liakos, A., Mathur, S., Mugrauer, M., Nogues, R. Naves, Nucciarelli, G., Ogloza, W., Ojha, D. K., Pajdosz-Śmierciak, U., Pascolini, S., Poyner, G., Reichart, D. E., Rizzi, N., Roncella, F., Sahu, D. K., Sillanpää, A., Simon, A., Siwak, M., Alfaro, F. C. Soldán, Sonbas, E., Tosti, G., Vasylenko, V., Webb, J. R., Zielinski, P.
OJ 287 is a BL Lacertae type quasar in which the active galactic nucleus (AGN) outshines the host galaxy by an order of magnitude. The only exception to this may be at minimum light when the AGN activity is so low that the host galaxy may make quite
Externí odkaz:
http://arxiv.org/abs/2205.15589