T Coronae Borealis poised to dazzle as a recurrent nova
The star T Coronae Borealis, situated nearly 3,000 light-years away, may soon explode as a nova. Astronomers eagerly anticipate this event, which could be visible to the naked eye.
The star T Coronae Borealis (T CrB) is a captivating entity in the constellation of the Northern Crown, attracting scientific interest for many years. Located nearly 3,000 light-years from Earth, it is a binary system comprising a white dwarf and a red giant.
Astronomers have predicted that T CrB might explode as a nova for over a year. If the explosion occurs opportunistically, it could be visible to the naked eye for several nights. Previous blasts occurred in 1866 and 1946, classifying T CrB as a recurrent nova.
Prof. Joanna Mikołajewska from the Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences explains that the white dwarf attracts material from the red giant. Once sufficient material accumulates, a thermonuclear explosion occurs.
The white dwarf, possessing strong gravity, captures material from its companion (donor). This material accumulates on its surface, becomes highly compressed, and upon reaching a critical mass, a thermonuclear explosion is triggered — explained Prof. Mikołajewska.
The unpredictable nature of the star
At the close 2023, a reduction in T CrB's brightness similar to the one preceding the 1946 explosion was observed. Nevertheless, the blast did not occur in 2024. Prof. Mikołajewska explains that the velocity at which the white dwarf captures material isn't constant, making it difficult to predict the exact timing of the explosion.
The rate at which the white dwarf captures material doesn't have to be constant, as no stars are perfectly stable — the researcher stated.
If T CrB explodes, the new star will appear in the constellation of the Northern Crown, nestled between the constellations of Boötes and Hercules. This phenomenon may be visible to the naked eye for two to three nights, and slightly longer with binoculars.
Let's hope it explodes soon and that it occurs between spring and autumn, as that part of the sky where T CrB is located is prominently visible then — summarised Prof. Mikołajewska.
Astronomers and astronomy enthusiasts eagerly await this event, which could provide invaluable scientific data and unforgettable viewing experiences.
