Zobrazeno 1 - 10
of 4 280
pro vyhledávání: '"Postnov A"'
Publikováno v:
Astronomy Letters 50, 302-316 (2024)
We consider the final evolutionary stages of a neutron star-black hole pair. According to the current paradigm, such systems eventually coalesce, which in some cases is accompanied by neutron-star tidal disruption. Using analytical methods, we show t
Externí odkaz:
http://arxiv.org/abs/2410.12541
Autor:
Sanjurjo-Ferrín, Graciela, Torrejón, Jose Miguel, Oskinova, Lida, Postnov, Konstantin, Rodes-Roca, Jose Joaquín, Schulz, Norbert, Nowak, Michael
Cen X-3 is a compact, high-mass X-ray binary (HMXRB), likely powered by Roche lobe overflow. We present a phase-resolved X-ray spectral and timing analysis of a target of opportunity \textit{Chandra} observation made during a low-flux to high-flux tr
Externí odkaz:
http://arxiv.org/abs/2409.13320
Autor:
Postnov, Konstantin, Chekh, Ilya
Primordial black holes (PBHs) with log-normal mass spectrum with masses up to $\sim 10^4-10^5 M_\odot$ can be created after QCD phase transition in the early Universe at $z\sim 10^{12}$ by the modified Affleck-Dine baryogenesis. Using a model binary
Externí odkaz:
http://arxiv.org/abs/2407.16373
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
We aim at searching for secular evolution of the orbital period in the short-period binary system WR 127 (WN3b+O9.5V, $P = 9.555^d$). We performed new low-resolution spectroscopic observations of WR 127 on 2.5-m CMO SAI telescope to construct the rad
Externí odkaz:
http://arxiv.org/abs/2403.06473
Autor:
Ryzhkova AI, Sazonova MA, Sinyov VV, Galitsyna EV, Chicheva MM, Melnichenko AA, Grechko AV, Postnov AY, Orekhov AN, Shkurat TP
Publikováno v:
Therapeutics and Clinical Risk Management, Vol Volume 14, Pp 1933-1942 (2018)
Anastasia I Ryzhkova,1,2 Margarita A Sazonova,1,3 Vasily V Sinyov,1 Elena V Galitsyna,4 Mariya M Chicheva,4 Alexandra A Melnichenko,4 Andrey V Grechko,5 Anton Yu Postnov,1 Alexander N Orekhov,3,6 Tatiana P Shkurat4 1Laboratory of Medical Genetics, Na
Externí odkaz:
https://doaj.org/article/8f2401c5db9f4eb7879f259a6ff52276
Stellar evolution theory predicts the existence of He-core remnants of the primary components of intermediate-mass close binaries that lost most of their H/He envelopes due to the mass exchange. They are expected to be observed as (1-7) solar mass ho
Externí odkaz:
http://arxiv.org/abs/2401.00802
Interest to astrophysical evidence for primordial black holes (PBHs) formed in the early Universe from initial cosmological perturbations has increased after the discovery of coalescing binary black holes with masses more than dozen solar ones by gra
Externí odkaz:
http://arxiv.org/abs/2309.16246
We report on the results of a Chandra observation of the source IGRJ16327-4940, suggested to be a high mass X-ray binary hosting a luminous blue variable star (LBV). The source field was imaged by ACIS-I in 2023 to search for X-ray emission from the
Externí odkaz:
http://arxiv.org/abs/2309.09850
We present the results of new photometric and spectroscopic observations of WN5+O6 binary V444 Cyg and a detailed analysis of extant spectroscopy and photometry. Using elements of the spectroscopic orbit and assuming e = 0, i = 78{\deg} we determined
Externí odkaz:
http://arxiv.org/abs/2309.08386