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Bulge Fossil Fragment

All articles tagged with #bulge fossil fragment

space3 hours ago•5 min saved

Milky Way’s ancient core revealed: Terzan 5 as a bulge fossil fragment

NASA’s JWST and Hubble visualisation traces Terzan 5, a dense stellar system in the Milky Way’s bulge about 22,000 light-years away in Sagittarius. Once thought a simple globular cluster, Terzan 5 is now seen as a bulge fossil fragment hosting four star generations, with some stars dating back ~12.5 billion years, and a mass of about two million solar masses. Its survival offers clues to the early Milky Way’s formation as the bulge assembled.

via The Times of India|

#bulge-fossil-fragment #hubble-space-telescope #james-webb-space-telescope

science2 days ago•9 min saved

Webb and Hubble Uncover Terzan 5 as a Milky Way Bulge Fossil Fragment

Using Webb’s infrared observations and Hubble’s precise proper motions, researchers confirm Terzan 5 is not a globular cluster but a self-enriching relic in the Milky Way’s bulge, hosting up to four distinct star populations formed 12.5, 4.7, 3.8 and 2.5 billion years ago. The system likely survived as a remnant of a much more massive progenitor, offering clues to how galactic bulges form and evolve over cosmic time.

via NASA Science (.gov)|

#bulge-fossil-fragment #galaxy-formation #milky-way-bulge