The curious case of the star that may have swallowed itself, Pg12

Key Highlights:

• Astronomers observed a supergiant star, M31-2014-DS1, in the Andromeda Galaxy that dimmed significantly between 2017 and 2023.
• The star's brightness decreased by over 10,000 times, leading to its disappearance from optical telescopes by 2023.
• Researchers suggest the star experienced a failed supernova, collapsing into a black hole after initially brightening in infrared light in 2014.
• An alternative theory proposes the dimming could be due to the collision and merging of two stars, as suggested by a group led by Emma Beasor.

Detailed Insights:

• The observed infrared brightening in 2014 likely resulted from a small amount of ejected material cooling and forming dust around the star.
• The event shares similarities with NGC 6946-BH1, which vanished in 2009, suggesting that failed supernovae might be more common than previously thought.
• The study challenges the predictability of the relationship between a star’s mass and its eventual fate, indicating more complex stellar evolution processes.
• A failed supernova occurs when a star's core collapses without a significant explosion, potentially leading to the star swallowing itself and forming a black hole.

Scientific/Technical Concepts Involved:

• Supernova: A powerful and luminous explosion of a star.
• Black Hole: A region in spacetime with extreme gravity, from which nothing, not even light, can escape.
• Infrared Light: Electromagnetic radiation with longer wavelengths than visible light, often associated with heat.