Betelgeuse's atmosphere is becoming spotty and asymmetric—and a nearby companion could be shaping the pattern

New observations of Betelgeuse indicate that the star's atmosphere is becoming increasingly spotty and asymmetric. According to reports from Phys.org and CPG Click Oil and Gas, the star, which possesses nearly 20 times the mass of the Sun, is displaying a bubbling surface. New images captured by the Atacama Large Millimeter/submillimeter Array, known as ALMA, have revealed the presence of hot regions that have captured the attention of the scientific community. These findings suggest that the surface of the red supergiant is not uniform, but rather characterized by these distinct, high-temperature areas. Coverage from Space Daily emphasizes a specific anomaly regarding a northeast hotspot on the star.

This particular region remained stable and held its position from 2015 through 2023. This longevity is a point of significant interest because the hotspot has outlived the large convective structures that are typically predicted by current astronomical models. The dailygalaxy.com reports that astronomers may have a theory regarding what is organizing these giant hot spots, suggesting that the observed patterns are not random but are being influenced by an external factor. To understand the significance of these findings, it is necessary to note the scale of Betelgeuse relative to our own solar system. As noted by CPG Click Oil and Gas, the star's massive size—nearly 20 times the mass of the Sun—makes its surface dynamics a critical area of study for understanding stellar evolution.

The fact that existing models cannot account for the duration of the northeast hotspot indicates a gap in current scientific understanding of how convective structures behave in supergiant stars, making the ALMA imagery vital for revising these theories. Future attention will likely focus on the potential presence of a nearby companion. As highlighted by Phys.org, researchers are exploring whether such a companion could be shaping the asymmetric patterns and organizing the hot spots observed on the stellar surface. Monitoring will continue to determine if this hypothesized companion is indeed the driver behind the bubbling surface and the stability of the northeast hotspot, as astronomers seek to reconcile these observations with their predictive models.