Tag

Stellarevolution

All articles tagged with #stellarevolution

science20 days ago•8 min saved

Andromeda Star Quietly Forms a Black Hole Without a Supernova

Astronomers tracked a massive star in the Andromeda Galaxy (M31-2014-DS1) that brightened in infrared in 2014, then faded and effectively disappeared by 2022–2023, indicating it collapsed into a black hole rather than exploding in a supernova. The remaining dust and gas emit a long-lasting mid-infrared glow as material slowly falls back, a process driven by convection that delays accretion and explains the dimming over decades. This event, linked to a similar case (NGC 6946-BH1), supports a broader class of failed supernovae and improves understanding of how some massive stars end their lives.

via ScienceDaily|

#andromeda #astronomy #blackholes

science-and-technology2 years ago•2 min saved

"ALMA Telescope Reveals Eccentric Dance of Binary Star System Through Cosmic Chemistry"

Scientists using the ALMA telescope have discovered the intricate orbital dance between a dying red giant star and its sunlike companion in the W Aquilae system. The study, published in Nature Astronomy, reveals a highly elliptical orbit that takes about a millennium to complete, with the companion star shaping the red giant's stellar wind. This finding was made possible by detecting unusual molecular emissions and is supported by hydrodynamical simulations and additional observations from other telescopes. The research not only uncovers the dynamics of the W Aquilae system but also introduces a new method for detecting the hidden companions of other stars nearing the end of their life cycle.

via Phys.org|

##almatelescope #astronomy