In April 2024, skywatchers were eagerly anticipating the total solar eclipse visible in Eastern Canada and the U.S. Another highly anticipated event was the potential appearance of a new star, T Coronae Borealis, in the night sky.
T Coronae Borealis, also known as T Cor Bor, is an existing star that typically cannot be seen without aid. However, there were expectations that it would brighten enough to be visible to the naked eye by the end of the year. Unfortunately, there was no significant brightening observed, leaving astronomers puzzled.
According to Brian Kloppenborg, an astrophysicist and executive director of the American Association of Variable Star Observers (AAVSO), there is still uncertainty surrounding the physics of the T Cor Bor system despite extensive studies.
Located approximately 3,000 light years away, T Cor Bor is part of a binary system in the Corona Borealis constellation consisting of a large red giant and a dense white dwarf. The system operates in a cycle where material from the red giant transfers to the white dwarf, leading to a thermonuclear explosion known as a nova that causes the star to brighten.
Historically, T Cor Bor has shown periods of high activity followed by a return to a low state before an eruption. Observations since 2014 have hinted at imminent eruptions, but the exact timing remains uncertain.
Recent research notes suggest potential eruption dates, with varying predictions on when the next eruption might occur. Regardless of the delay in T Cor Bor’s eruption, amateur astronomers continue to monitor the star closely, providing valuable observations.
When T Cor Bor eventually erupts, it is expected to brighten significantly for a short period before dimming again. Despite the current lack of eruption, astronomers are prepared for the event and remain vigilant in their observations of this intriguing celestial phenomenon.