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Red Giant Component of the Recurrent Nova T Coronae Borealis

Zamanov R. K., Marchev D., Marchev V., Moyseev M., Yordanova G., Martí J., Bode M. F., Stoyanov K. A.

Acta Astronomica

2024

Vol. 74, No. 4

265--271

We performed simultaneous V-band photometry and spectroscopic observations of the recurrent nova TCrB and estimate the V-band magnitude of the red giant. We found apparent and absolute V-band magnitudes mV=10.17±0.06 and mV=+0.14±0.08, respectively, for the red giant of TCrB. At the maximum of the ellipsoidal variation when these values are obtained, its absolute V-band magnitude is similar but fainter than that of the typical M4/5III giants.