Every superhero needs a sidekick, and it looks like Betelgeuse has found one! Betelgeuse, a dazzling red supergiant star in the Orion constellation, has intrigued astronomers for ages. Scientists have long suspected it had a companion because of its changing brightness, but proof was elusive—until now. Meet Betelbuddy!
Recently, the Gemini North Telescope in Hawaii spotted a faint companion star near Betelgeuse. Researchers from Carnegie Mellon University (CMU) used NASA’s Chandra X-ray Observatory and the Hubble Space Telescope to take a closer look. The timing was key; Betelbuddy was at its furthest point from Betelgeuse, allowing for clearer observations. Betelgeuse is enormous, about 700 times larger than our sun and thousands of times brighter.
“We had never had a good observation of Betelbuddy without Betelgeuse blocking it,” said Anna O’Grady from CMU. “These observations are the deepest X-ray findings of Betelgeuse to date.” This breakthrough opens new doors for understanding the star’s characteristics and its enigmatic companion.
Interestingly, the research indicated that Betelbuddy isn’t the typical white dwarf or neutron star. Instead, it might be a younger star, about the same size as our sun. This revelation challenges what scientists know about binary stars, which usually have similar mass ratios. Here, Betelgeuse weighs about 16 to 17 times more than our sun, while Betelbuddy is comparable to our sun.
“This opens up a new area of exploration for extreme mass ratio binaries,” stated O’Grady. These types of star systems are rarely identified, making this discovery especially exciting. Current estimates suggest that only about 1% of binary star systems have such a significant mass difference. With Betelgeuse and Betelbuddy, there’s much more to uncover.
As research continues, this fascinating duo promises to reshape our understanding of stellar dynamics. The CMU team’s findings will be published in The Astrophysical Journal on October 10. Betelgeuse and Betelbuddy’s story is just beginning, and astronomers are eager to see what they reveal next.
