A cosmic breadcrumb trail leads astronomers to a discovery in another galaxy
The faint star ribbon lets astronomers estimate the galaxy’s mass and dark matter using Hubble archival data, the team said.
- On Wednesday, astronomers published a study in Nature detailing the first detection of a globular cluster stellar stream outside the Milky Way, located in the ultra-diffuse galaxy UGC 9050-Dw1.
- Archival Hubble Space Telescope data revealed the faint arc of stars roughly 115 million light-years from Earth, a dense ball being slowly pulled apart by its host galaxy's gravity.
- Co-Lead author Julie Kiel Holm of the Niels Bohr Institute in Copenhagen noted that about 80% to 85% of the universe is dark matter. Modeling the stream allowed the team to map the galaxy's gravitational field.
- Sarah Pearson, an associate professor at DTU Space, the National Space Institute at the Technical University of Denmark, stated these ultra-diffuse galaxies provide a 'great combination' of faint background and tidal fields necessary to isolate streams.
- Tjitske Starkenburg, a co-author at Northwestern University, said NASA's Nancy Grace Roman Space Telescope, launching later this month, will have a field of view 'like 100 Hubbles in one image,' enabling future dark matter mapping.
17 Articles
17 Articles
By Taylor Nicioli, CNN A dim ribbon of stars in a distant galaxy has led astronomers to a discovery that could reveal secrets about one of the greatest mysteries of our universe.Hideing within the archive data of the Hubble Space Telescope, researchers found the trail of stars barely visible, the first The post A tiny cosmic trail leads astronomers to a discovery in another galaxy appeared first on KVIA.
The Almost Invisible Ghost Galaxy that Can Have More than 99.9% Dark Matter and Intrigue Astronomers
Hundreds of millions of light-years, a huge structure emits so little light that it almost disappears against the background of the Universe. Dragonfly 44 is an ultra-diffuse galaxy whose small population of stars seems to occupy a much larger halo of matter, making it an unusual laboratory to investigate dark matter. Why the Dragonfly 44 seems... The post The almost invisible ghost galaxy that can have more than 99.9% dark matter and intrigues …
A tenuous range of stars in a distant galaxy led astronomers to a discovery that can reveal secrets about one of the greatest mysteries of our Universe. Hidden in Hubble Space Telescope file data, researchers have found an almost invisible trail of stars — the first stellar stream of a globular cluster detected outside the Milky Way. The celestial phenomenon, located in a galaxy about 115 million light-years from Earth, is the remnant of a dense…
Astronomers Discover a Stellar Stream Beyond the Milky Way for the First Time
Astronomers have discovered a faint stream of stars in another galaxy for the first time, opening a new way to investigate one of the universe’s biggest mysteries: dark matter. The newly discovered structure is known as a globular cluster stellar stream. These streams form when groups of stars called globular clusters are gradually pulled apart […] The post Astronomers Discover a Stellar Stream Beyond the Milky Way for the First Time appeared fi…
Coverage Details
Bias Distribution
- 91% of the sources are Center
Factuality
To view factuality data please Upgrade to Premium
