Zobrazeno 1 - 10
of 158
pro vyhledávání: '"Oparin, D. A."'
Publikováno v:
Astronomy Reports, 2024, Vol.68, No.7, pp.619-640
Results of a study of physical parameters of stellar population in star formation regions in galaxies with signs of peculiarity NGC 3963 and NGC 7292 are presented. The study was carried out based on the analysis of photometric (UBVRI bands), H-alpha
Externí odkaz:
http://arxiv.org/abs/2410.06098
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:
Kolbin, A. I., Suslikov, M. V., Kochkina, V. Yu., Borisov, N. V., Burenkov, A. N., Oparin, D. V.
The asynchrony of the polar SDSS~J085414.02+390537.3 was revealed using the data of ZTF photometric survey. The light curves show a beat period $P_{beat} = 24.6 \pm 0.1$~days. During this period the system changes its brightness by $\sim 3^m$. The pe
Externí odkaz:
http://arxiv.org/abs/2308.04597
Though S0 galaxies are usually thought to be `red and dead', they often demonstrate weak star formation organised in ring structures and located in their outer disks. We try to clarify the nature of this phenomenon and its difference from star format
Externí odkaz:
http://arxiv.org/abs/2212.08951
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:
Solovyeva, Y., Vinokurov, A., Tikhonov, N., Kostenkov, A., Atapin, K., Sarkisyan, A., Moiseev, A., Fabrika, S., Oparin, D., Valeev, A.
We continue the search for luminous blue variables (LBVs) in Local Volume galaxies in order to study their fundamental parameters. In this paper, we report the discovery of two new LBVs in the dwarf irregular galaxy NGC 1156. Both stars exhibit spect
Externí odkaz:
http://arxiv.org/abs/2208.05858
Autor:
Cai, Y. -Z., Pastorello, A., Fraser, M., Wang, X. -F., Filippenko, A. V., Reguitti, A., Patra, K. C., Goranskij, V. P., Barsukova, E. A., Brink, T. G., Elias-Rosa, N., Stevance, H. F., Zheng, W., Yang, Y., Atapin, K. E., Benetti, S., de Boer, T. J. L., Bose, S., Burke, J., Byrne, R., Cappellaro, E., Chambers, K. C., Chen, W. -L., Emami, N., Gao, H., Hiramatsu, D., Howell, D. A., Huber, M. E., Kankare, E., Kelly, P. L., Kotak, R., Kravtsov, T., Lander, V. Yu., Li, Z. -T., Lin, C. -C., Lundqvist, P., Magnier, E. A., Malygin, E. A., Maslennikova, N. A., Matilainen, K., Mazzali, P. A., McCully, C., Mo, J., Moran, S., Newsome, M., Oparin, D. V., Gonzalez, E. Padilla, Reynolds, T. M., Shatsky, N. I., Smartt, S. J., Smith, K. W., Stritzinger, M. D., Tatarnikov, A. M., Terreran, G., Uklein, R. I., Valerin, G., Vallely, P. J., Vozyakova, O. V., Wainscoat, R., Yan, S. -Y., Zhang, J. -J., Zhang, T. -M., Zheltoukhov, S. G., Dastidar, R., Fulton, M., Galbany, L., Gangopadhyay, A., Ge, H. -W., Gutiérrez, C. P., Lin, H., Misra, K., Ou, Z. -W., Salmaso, I., Tartaglia, L., Xiao, L., Zhang, X. -H.
Publikováno v:
A&A 667, A4 (2022)
We present an observational study of the luminous red nova (LRN) AT\,2021biy in the nearby galaxy NGC\,4631. The field of the object was routinely imaged during the pre-eruptive stage by synoptic surveys, but the transient was detected only at a few
Externí odkaz:
http://arxiv.org/abs/2207.00734
Autor:
Keel, William C., Moiseev, Alexei, Kozlova, D. V., Ikhsanova, A. I, Oparin, D. V., Uklein, R. I., Smirnova, A. A., Eselevich, M. V.
We present a narrowband [O III] imaging survey of 111 AGN hosts and 17 merging-galaxy systems, in search of distant extended emission-line regions (EELRs) around AGN (either extant or faded). Our data reach deeper than detection from the broadband SD
Externí odkaz:
http://arxiv.org/abs/2112.07084
Autor:
Pustilnik, S. A., Egorova, E. S., Kniazev, A. Y., Perepelitsyna, Y. A., Tepliakova, A. L., Burenkov, A. N., Oparin, D. V.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 507, Issue 1, October 2021, Pages 944-962
We present the second part of results of the on-going project of searching for and studying eXtremely Metal-Poor (XMP, adopted as those with Z(gas) <~ Zo/30, or with 12+log(O/H) <~ 7.21~dex) very gas-rich blue dwarfs in voids.They were first identifi
Externí odkaz:
http://arxiv.org/abs/2108.12065
The nature of ultraluminous X-ray sources (ULXs) is not yet fully understood but it can be done in the most efficient way by analyzing its optical emission and environment. We present preliminary results of photometric and spectral studies of some ne
Externí odkaz:
http://arxiv.org/abs/2010.05866