Tag

Metal Poor

All articles tagged with #metal poor

science1 year ago

Rare Supernova Discovery May Alter Cosmic History

Astronomers have discovered supernova 2023ufx, the most metal-poor stellar explosion observed, in a dwarf galaxy. This finding provides insights into the early universe's conditions, aiding in understanding galaxy formation and evolution. The supernova's unique properties, such as its rapid brightness decline and fast-moving ejected material, suggest that rapidly spinning metal-poor stars were common in the early universe. The discovery, facilitated by advanced instruments like the James Webb Space Telescope, offers a benchmark for future studies on metal-poor stars and cosmic evolution.

astronomy1 year ago

"Discovery of the Most Metal-Poor Extreme Helium Star by Astronomers"

Using the Southern African Large Telescope (SALT), astronomers have discovered EC 19529−4430, the most metal-poor extreme helium star known to date, located in the Galactic halo about 15,500 light years away. The star's surface is primarily composed of carbon-nitrogen-oxygen-processed helium, and it is the coolest known carbon-poor and nitrogen-rich extreme helium star. Researchers believe it likely formed from the merger of two helium white dwarfs and will evolve into a core helium-burning EHe subdwarf.

astronomy2 years ago

Discovery of Ancient, Dim, and Metal-Deficient Star Cluster

Astronomers have discovered a new star cluster, DELVE 6, which is ultra-faint, metal-poor, and estimated to be about 9 billion years old. It is located in the outskirts of the Magellanic Clouds, beyond the tidal radius of the Large Magellanic Cloud due to the Milky Way and the tidal radius of the Small Magellanic Cloud due to the Large Magellanic Cloud. DELVE 6 may be only the second or third ancient star cluster associated with the Small Magellanic Cloud or one of fewer than two dozen ancient clusters associated with the Large Magellanic Cloud.