Rapid Spectral Variability of T Corona Borealis

The results of the analysis of photometric and spectral monitorings of the recurrent symbiotic nova T CrB, carried out using the low-resolution spectrograph TDS of the 2.5-m telescope and the CCD photometer of the 0.6-m telescope of the CMO SAI, are presented. It is shown that the fluxes in the emis...

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Bibliographic Details
Published in:Astrophysical bulletin 2023-09, Vol.78 (3), p.325-332
Main Authors: Maslennikova, N. A., Tatarnikov, A. M., Tatarnikova, A. A.
Format: Article
Language:English
Subjects:
Accretion disks
Astronomy
Astrophysics and Cosmology
Corona Borealis constellation
Emission
Light curve
Nebulae
Physics
Physics and Astronomy
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Summary:The results of the analysis of photometric and spectral monitorings of the recurrent symbiotic nova T CrB, carried out using the low-resolution spectrograph TDS of the 2.5-m telescope and the CCD photometer of the 0.6-m telescope of the CMO SAI, are presented. It is shown that the fluxes in the emission lines H , H , He I 5876 change by 6–16 , and in the emission line He II 4686 by about 60 on timescales of 20–60 minutes. The line flux curves on August 25, 2020 are similar to the light curve of T CrB, but with a time delay of up to 600 s for different lines. The observed spectrum is approximated by the radiation of the system components with the following parameters: a red giant of spectral type M4 III, a nebula with K and emission measure of cm , and the accretion disk with , (at inclination ).
ISSN:1990-3413
1990-3421
DOI:10.1134/S1990341323600187