Abstract
We present the results of our long-term photometric and spectroscopic monitoring with the 1.5-m telescope RTT-150 for the optical counterpart of the high-mass X-ray binary IGR J21343+4738 discovered in 2002 by the INTEGRAL space X-ray observatory. The X-ray source was also repeatedly detected by the telescopes of the SRG observatory during the all-sky surveys in the period 2019–2021. We have investigated the spectroscopic and photometric variabilities of the optical counterpart, a Be star, caused by physical processes in the equatorial disk. The evolution of the equatorial disk parameters over a long time interval of 16 years has been analyzed.
Notes
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ACKNOWLEDGMENTS
We are grateful to TÜBİTAK, the Space Research Institute, the Kazan Federal University, and the Academy of Sciences of Tatarstan for their partial support in using RTT-150 (the Russian–Turkish 1.5-m telescope in Antalya). We are grateful to R.Ya. Zhuchkov and S.S. Melnikov for their help in the RTT-150 observations.
Funding
The analysis of the physical parameters of the equatorial disk of the Be star in the system IGR J21343+4738 was supported by RSF grant no. 21-12-00210. The work of E.R. Irtuganov, M.A. Gorbachev, R.I. Gumerov, and N.A. Sakhibullin was supported in part by subsidy no. FZSM-2023-0015 of the Ministry of Education and Science of the Russian Federation allocated to the Kazan Federal University for the State assignment in the sphere of scientific activities.
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Translated by V. Astakhov
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Nikolaeva, E.A., Bikmaev, I.F., Irtuganov, E.N. et al. Investigation of the Disk of the Be Star in the High-Mass X-ray Binary IGR J21343+4738. Astron. Lett. 49, 697–705 (2023). https://doi.org/10.1134/S1063773723110075
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DOI: https://doi.org/10.1134/S1063773723110075