Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Lyskova, N"'
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
Temperature of the hot gas in galaxy clusters is known to be a reliable proxy for the their total gravitating mass, allowing one to use spectroscopic X-ray observations for halo mass function measurements. Data of shallow wide area surveys, however,
Externí odkaz:
http://arxiv.org/abs/2408.12026
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
Autor:
Zaznobin, I. A., Burenin, R. A., Meshcheryakov, A. V., Gilfanov, M. R., Lyskova, N. S., Medvedev, P. S., Sazonov, S. Yu., Sunyaev, R. A.
Publikováno v:
Astronomy Letters 49 (2023) 431-444
We discuss an algorithm whereby the massive galaxy clusters detected in the SRG/eROSITA all-sky survey are identified and their photometric redshifts are estimated. For this purpose, we use photometric redshift estimates for galaxies and WISE forced
Externí odkaz:
http://arxiv.org/abs/2403.18608
Autor:
Roberts, I. D., van Weeren, R. J., Lal, D. V., Sun, M., Chen, H., Ignesti, A., Brüggen, M., Lyskova, N., Venturi, T., Yagi, M.
$Aims:$ We used the nearby Coma Cluster as a laboratory in order to probe the impact of ram pressure on star formation as well as to constrain the characteristic timescales and velocities for the stripping of the non-thermal ISM. $Methods:$ We used h
Externí odkaz:
http://arxiv.org/abs/2310.20417
Galaxy clusters are the most massive gravitationally bound systems consisting of dark matter, hot baryonic gas and stars. They play an important role in observational cosmology and galaxy evolution studies. We develop a deep learning model for segmen
Externí odkaz:
http://arxiv.org/abs/2309.17077
While hot ICM in galaxy clusters makes these objects powerful X-ray sources, the cluster's outskirts and overdense gaseous filaments might give rise to much fainter sub-keV emission. Cosmological simulations show a prominent "focusing" effect of rich
Externí odkaz:
http://arxiv.org/abs/2305.07579
Using the data of the SRG/eROSITA all-sky survey, we stacked a sample of ~40 galaxy cluster images in the 0.3--2.3 keV band, covering the radial range up to $10\times R_{\rm 500c}$. The excess emission on top of the galactic and extragalactic X-ray b
Externí odkaz:
http://arxiv.org/abs/2305.07080
Autor:
Lal, D. V., Lyskova, N., Zhang, C., Venturi, T., Forman, W. R., Jones, C., Churazov, E. M., van Weeren, R. J., Bonafede, A., Miller, N. A., Roberts, I. D., Bykov, A. M., Di Mascolo, L., Brüggen, M., Brunetti, G.
We present high-resolution, high-sensitivity upgraded Giant Metrewave Radio Telescope observations of the Coma cluster (A1656) at 250-500 MHz and 550-850 MHz. At 250-500 MHz, 135 sources have extensions $>$ 0.45 arcmin (with peak-to-local-noise ratio
Externí odkaz:
http://arxiv.org/abs/2207.06624
Publikováno v:
A&A 670, A156 (2023)
This is the second paper in a series of studies of the Coma cluster using the SRG/eROSITA X-ray data obtained during the calibration and performance verification phase of the mission. Here, we focus on the region adjacent to the radio source 1253+275
Externí odkaz:
http://arxiv.org/abs/2205.07511