Zobrazeno 1 - 10
of 4 726
pro vyhledávání: '"Sunyaev A"'
The widespread diffusion of Artificial Intelligence (AI)-based systems offers many opportunities to contribute to the well-being of individuals and the advancement of economies and societies. This diffusion is, however, closely accompanied by public
Externí odkaz:
http://arxiv.org/abs/2410.04247
We report the discovery of a short, large amplitude X-ray flare from AT2019vcb (aka Tormund), a tidal disruption event at $z=0.088$. The discovery is based on the data from the SRG/eROSITA X-ray telescope which happened to observe the source seven mo
Externí odkaz:
http://arxiv.org/abs/2409.16908
Autor:
Lyskova, N., Churazov, E., Khabibullin, I., Bikmaev, I. F., Burenin, R. A., Forman, W. R., Khamitov, I. M., Rajpurohit, K., Sunyaev, R., Jones, C., Kraft, R., Zaznobin, I., Gorbachev, M. A., Suslikov, M. V., Gumerov, R. I., Sakhibullin, N. A.
Massive clusters of galaxies are very rare in the observable Universe. Even rarer are mergers of such clusters observed close to pericenter passage. Here, we report on one such case: a massive (~ $10^{15}\,M_\odot$) and hot (kT ~ 10 keV) cluster CL02
Externí odkaz:
http://arxiv.org/abs/2409.07856
Autor:
Kolbin, A. I., Karpova, A. V., Suslikov, M. V., Bikmaev, I. F., Gilfanov, M. R., Khamitov, I. M., Shibanov, Yu. A., Zyuzin, D. A., Beskin, G. M., Plokhotnichenko, V. L., Gutaev, A. G., Karpov, S. V., Lyapsina, N. V., Medvedev, P. S., Sunyaev, R. A., Kirichenko, A. Yu., Gorbachev, M. A., Irtuganov, E. N., Gumerov, R. I., Sakhibullin, N. A., Shablovinskaya, E. S., Malygin, E. A.
SRGe J194401.8+284452 is the brightest point-like X-ray object within the position uncertainty ellipse of an unidentified $\gamma$-ray source 4FGL J1943.9+2841. We performed multi-wavelength spectral and photometric studies to determine its nature an
Externí odkaz:
http://arxiv.org/abs/2408.14136
Autor:
Mukhin, Andrey, Krivonos, Roman, Bikmaev, Ilfan, Gorbachev, Mark, Khamitov, Irek, Sazonov, Sergey, Gilfanov, Marat, Sunyaev, Rashid
In this work, we studied X-ray source SRGe J021932.4$-$040154 (SRGe J02193), which we associated with a single X-ray active star of spectral class G2V$-$G4V and the rotational period $\rm P_{rot} < 9.3$ days. Additional analysis of TESS light-curves
Externí odkaz:
http://arxiv.org/abs/2408.07442
Autor:
Grebenev, S. A., Sunyaev, R. A.
Publikováno v:
Astronomy Letters, 50 (2024), 159-185
We explore the possibility of detecting the excess of the cosmic radio background (CRB) toward galaxy clusters due to its Compton scattering by electrons of the hot intergalactic gas. When mapping the background fluctuations at frequencies < 800 MHz,
Externí odkaz:
http://arxiv.org/abs/2408.01858
Autor:
Churazov, E., Khabibullin, I., Bykov, A. M., Chugai, N. N., Sunyaev, R. A., Utrobin, V. P., Zinchenko, I. I.
We argue that the North Polar Spur (NPS) and many less prominent structures are formed by gaseous metal-rich plumes associated with star-forming regions (SFRs). The SFRs located at the tangent to the 3-5~kpc rings might be particularly relevant to NP
Externí odkaz:
http://arxiv.org/abs/2408.00752
Autor:
Veledina, Alexandra, Poutanen, Juri, Bocharova, Anastasiia, Di Marco, Alessandro, Forsblom, Sofia V., La Monaca, Fabio, Podgorny, Jakub, Tsygankov, Sergey S., Zdziarski, Andrzej A., Ahlberg, Varpu, Green, David A., Muleri, Fabio, Rhodes, Lauren, Bianchi, Stefano, Costa, Enrico, Dovciak, Michal, Loktev, Vladislav, McCollough, Michael, Soffitta, Paolo, Sunyaev, Rashid
Publikováno v:
A&A 688, L27 (2024)
Cygnus X-3 is an enigmatic X-ray binary, that is both an exceptional accreting system and a cornerstone for the population synthesis studies. Prominent X-ray and radio properties follow a well-defined pattern, yet the physical reasons for the state c
Externí odkaz:
http://arxiv.org/abs/2407.02655
Autor:
Sazonov, S., Burenin, R., Filippova, E., Krivonos, R., Arefiev, V., Borisov, K., Buntov, M., Chen, C. -T., Ehlert, S., Garanin, S., Garin, M., Grigorovich, S., Lapshov, I., Levin, V., Lutovinov, A., Mereminskiy, I., Molkov, S., Pavlinsky, M., Ramsey, B. D., Semena, A., Semena, N., Shtykovsky, A., Sunyaev, R., Tkachenko, A., Swartz, D. A., Uskov, G., Vikhlinin, A., Voron, V., Zakharov, E., Zaznobin, I.
We present an updated catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope aboard the Spektrum-Roentgen-Gamma (SRG) observatory during its all-sky survey. It is based on the data of the first four and the partially completed fifth sc
Externí odkaz:
http://arxiv.org/abs/2405.09184
Autor:
Zaznobin, I. A., Burenin, R. A., Belinski, A. A., Bikmaev, I. F., Gilfanov, M. R., Dodin, A. V., Dodonov, S. N., Eselevich, M. V., Zheltoukhov, S. F., Irtuganov, E. N., Kotov, S. S., Krivonos, R. A., Lyskova, N. S., Malygin, E. A., Maslennikova, N. A., Medvedev, P. S., Meshcheryakov, A. V., Moiseev, A. V., Oparin, D. V., Potanin, S. A., Postnov, K. A., Sazonov, S. Yu., Safonov, B. S., Sakhibullin, N. A., Starobinsky, A. A., Suslikov, M. V., Sunyaev, R. A., Tatarnikov, A. M., Uskov, G. S., Uklein, R. I., Khabibullin, I. I., Khamitov, I. M., Khorunzhev, G. A., Churazov, E. M., Shablovinskaya, E. S., Shatsky, N. I.
Publikováno v:
Astronomy Letters 49 (2023) 599-620
We present the results of the optical identification and spectroscopic redshift measurements of 216 galaxy clusters detected in the SRG/eROSITA all-sky X-ray survey. The spectroscopic observations were performed in 2020-2023 with the 6-m BTA telescop
Externí odkaz:
http://arxiv.org/abs/2403.18625