Astronomers uncover companion star near Betelgeuse

Astronomers have confirmed the existence of a companion star orbiting Betelgeuse, shedding light on its variability.

Astronomers validate presence of companion star near Betelgeuse

Astronomers have discovered a companion star closely orbiting Betelgeuse, a well-known red supergiant in the Orion constellation. This finding resolves questions about the star's brightness fluctuations. Using the 'Alopeke' instrument at the Gemini North telescope, researchers led by NASA's Steve Howell identified the companion star, providing insights into the mechanisms behind Betelgeuse's six-year brightness cycle. Previous attempts to confirm the companion's existence with Hubble and Chandra were unsuccessful. The companion star is significantly fainter, approximately six magnitudes less bright, and is expected to spiral into Betelgeuse over the next 10,000 years, affecting its future.

The confirmation of a companion star to Betelgeuse highlights advanced observational techniques that continue to push the boundaries of astronomy. The success of the ‘Alopeke’ instrument not only addresses long-standing mysteries about Betelgeuse's variability but also opens avenues for further research into red supergiant stars. As scientists anticipate close observations as the companion approaches Betelgeuse again in 2027, we could gain deeper insights into stellar evolution and the life cycles of massive stars, a subject of vast importance in understanding the cosmos.

Highlights

Future observations may yield even more insights into Betelgeuse and similar stars.