Stellar streams formed from ancient galactic accretion events hold valuable information about their origins, preserving chemical and dynamic details for billions of years. Over 100 of these structures have been discovered, predominantly cold streams.
Astronomers, led by Hao Tian from the Chinese Academy of Sciences (CAS), utilized Gaia’s Data Release 3 (DR3) to investigate stellar substructures in the Milky Way’s halo. Their research unveiled a new tidal stellar stream, unveiling its key characteristics.
“Thanks to Gaia’s precise astrometric measurements, a previously unknown tidal stellar stream has been detected in the northern sky,” the team reported.
This newfound tidal stellar stream resides at a high Galactic latitude between 30-60 degrees, spanning Galactic longitudes from 270 to 30 degrees. Despite its low surface density, it stands out significantly within its surroundings.
2024-04-15 03:51:02
Original article from phys.org