Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Spiridonova, O. A."'
Autor:
Kolbin, A. I., Pavlenko, E. P., Kochkina, V. Yu., Vinokurov, A. S., Shugarov, S. Yu., Sosnovskij, A. A., Antonyuk, K. A., Antonyuk, O. I., Pit, N. V., Suslikov, M. V., Galimova, E. K., Borisov, N. V., Burenkov, A. N., Spiridonova, O. I.
Publikováno v:
Astronomy Letters, vol. 50, No 5, pp.335-349 (2024)
We present the results of the optical study of the new eclipsing polar Gaia23cer. We analyzed the brightness variability of the polar in high ($\langle r \rangle \approx 16.5\mathrm{\,mag}$) and low ($\langle r \rangle \approx 19.2\mathrm{\,mag}$) st
Externí odkaz:
http://arxiv.org/abs/2409.15570
Autor:
Vlasyuk, V. V., Sotnikova, Yu. V., Volvach, A. E., Spiridonova, O. I., Stolyarov, V. A., Mikhailov, A. G., Kovalev, Yu. A., Kovalev, Y. Y., Khabibullina, M. L., Kharinov, M. A., Yang, L., Mingaliev, M. G., Semenova, T. A., Zhekanis, P. G., Mufakharov, T. V., Udovitskiy, R. Yu., Kudryashova, A. A., Volvach, L. N., Erkenov, A. K., Moskvitin, A. S., Emelianov, E. V., Fatkhullin, T. A., Tsybulev, P. G., Nizhelsky, N. A., Zhekanis, G. V., Kravchenko, E. V.
We present an optical-to-radio study of the BL Lac object S4 0954+658 observations during 1998-2023. The measurements were obtained with the SAO RAS Zeiss-1000 1-m and AS-500/2 0.5-m telescopes in 2003-2023, with the RATAN-600 radio telescope at 1.25
Externí odkaz:
http://arxiv.org/abs/2401.03992
Autor:
Raiteri, C. M., Villata, M., Carnerero, M. I., Savchenko, S. S., Kurtanidze, S. O., Vlasyuk, V. V., Marchini, A., Matsumoto, K., Lorey, C., Joner, M. D., Gazeas, K., Carosati, D., Mirzaqulov, D. O., Pulido, J. A. Acosta, Agudo, I., Bachev, R., Benítez, E., Borman, G. A., Calcidese, P., Chen, W. P., Damljanovic, G., Ehgamberdiev, S. A., Elsässer, D., Feige, M., Frasca, A., Gaur, H., Grishina, T. S., Gupta, A. C., Hiriart, D., Holland, M., Horst, B., Ibryamov, S., Ivanidze, R. Z., Jensen, J., Jithesh, V., Jovanovic, M. D., Kiehlmann, S., Kimeridze, G. N., Kishore, S., Kopatskaya, E. N., Kurtanidze, O. M., Larionova, E. G., Lin, H. C., Mannheim, K., Marinelli, C., Reyes, J. Moreira, Morozova, D. A., Nikolashvili, M. G., Reinhart, D., Romanov, F. D., Semkov, E., Seufert, J., Shishkina, E. V., Sigua, L. A., Skalidis, R., Spiridonova, O. I., Stojanovic, M., Strigachev, A., Troitskaya, Y. V., Troitskiy, I. S., Tsai, A., Vasilyev, A. A., Vince, O., Vrontaki, K., Wani, K., Watts, D., Zhovtan, A. V.
In 2022 the BL Lac object S4 0954+65 underwent a major variability phase, reaching its historical maximum brightness in the optical and $\gamma$-ray bands. We present optical photometric and polarimetric data acquired by the Whole Earth Blazar Telesc
Externí odkaz:
http://arxiv.org/abs/2310.11108
Autor:
Kolbin, A. I., Borisov, N. V., Burenkov, A. N., Spiridonova, O. I., Bikmaev, I. F., Suslikov, M. V.
Publikováno v:
Astronomy Letters, 2023, Volume 49, Issue 3, p.129-140
This paper presents a spectral and photometric study of the poorly studied polar BM CrB. Three states of the polar brightness and signs of transition from one-pole to two-pole accretion mode were found by an analysis of ZTF data. It is shown that the
Externí odkaz:
http://arxiv.org/abs/2304.13655
Autor:
Solovyeva, Y., Vinokurov, A., Sarkisyan, A., Kostenkov, A., Atapin, K., Fabrika, S., Oparin, D., Valeev, A., Bizyaev, D., Nedialkov, P., Spiridonova, O.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 507, Issue 3, pp.4352-4366, 2021
We continue to search for LBV stars in galaxies outside the Local Group. In this work, we have investigated four luminous stars in NGC 4449. Multiple spectral observations carried out for J122810.94+440540.6, J122811.70+440550.9, and J122809.72+44051
Externí odkaz:
http://arxiv.org/abs/2208.05892
Autor:
Gvaramadze, V. V., Gräfener, G., Langer, N., Maryeva, O. V., Kniazev, A. Y., Moskvitin, A. S., Spiridonova, O. I.
Publikováno v:
Nature 569, 684-687 (30 May 2019)
Gravitational wave emission can lead to the coalescence of close pairs of compact objects orbiting each other. For the case of neutron stars such mergers may yield masses above the Tolman-Oppenheimer-Volkoff limit, leading to the formation of black h
Externí odkaz:
http://arxiv.org/abs/1904.00012
Autor:
Shapovalova, A. I., Popovic, L. C., Afanasiev, V. L., Ilic, D., Kovacevic, A., Burenkov, A. N., Chavushyan, V. H., Marceta-Mandic, S., Spiridonova, O., Valdes, J. R., Bochkarev, N. G., Patino-Alvarez, V., Carrasco, L., Zhdanova, V. E.
Here we present the long-term optical spectral monitoring of a changing-look active galactic nuclei (AGN) NGC 3516 that covers 22 years (from 1996 to 2018). We explore a variability in the broad lines and continuum, finding that the continuum is chan
Externí odkaz:
http://arxiv.org/abs/1902.10845
Autor:
Solovyeva, Y., Vinokurov, A., Fabrika, S., Kostenkov, A., Sholukhova, O., Sarkisyan, A., Valeev, A., Atapin, K., Spiridonova, O., Moskvitin, A., Nikolaeva, E.
We have found three new LBV candidates in the star-forming galaxy NGC 4736. They show typical well-known LBV spectra, broad and strong hydrogen lines, He I lines, many Fe II lines, and forbidden [Fe II] and [Fe III]. Using archival Hubble Space Teles
Externí odkaz:
http://arxiv.org/abs/1901.05277
Autor:
Shapovalova, Alla I., Popović, L. C., Chavushyan, V. H., Afanasiev, V. L., Ilić, D., Kovacević, A., Burenkov, A. N., Kollatschny, W., Spiridonova, O., Valdes, J. R., Bochkarev, N. G., Patino-Alvarez, V., Carrasco, L., Zhdanova, V. E.
We present the results of the long-term (20-year period, from 1996 to 2015) optical spectral monitoring of the Seyfert 1 galaxy NGC 7469. The variation in the light-curves of the broad He II {\lambda}4686A H{\beta} and H{\alpha} lines, and the contin
Externí odkaz:
http://arxiv.org/abs/1701.01490
Autor:
Goranskij, V. P., Barsukova, E. A., Spiridonova, O. I., Valeev, A. F., Fatkhullin, T. A., Moskvitin, A. S., Vozyakova, O. V., Cheryasov, D. V., Safonov, B. S., Zharova, A. V., Hancock, T.
Publikováno v:
Astrophysical Bulletin, V.71, P.82 (2016)
We present the results of the study of the red nova PSN J14021678+5426205 based on the observations carried out with the Russian 6-m telescope (BTA) along with other telescopes of SAO RAS and SAI MSU. To investigate the nova progenitor, we used the d
Externí odkaz:
http://arxiv.org/abs/1611.04936