Record-breaking faint and luminous companion to the Milky Way discovered (which may be packed with dark matter)
The new companion is called Ursa Major III/ UNIONS 1 , or UMa3/U1 , and is a so-called Milky Way satellite: the system orbits our galaxy. UMa3/U1 is located in the constellation ‘Big Dipper’ and is relatively close to the sun at a distance of 30,000 light years.
The system is also very small: from top to bottom it measures only 10 light years. UMa3/U1 contains a total of about 60 stars, which together weigh sixteen times more than the sun. Scientist Will Cerny worked on the research. He explains: ” UMa3/U1 is so small that it is very surprising that it still exists today. It would have made sense if the strong force of the.
The fact that this has not yet happened leads to two
Milky Way had pulled the galaxy apart. possibilities: either UMa3/U1 is a small galaxy held together by a lot of dark matter, or it is a star cluster that will soon die. Given that all the stars have about the same speed, we think that this is probably the first option: a galaxy that is chock full of dark matter.” The results of the research have published in the journal.
The researchers used two buy email database observatories in Hawaii for their research: the WM Keck Observatory and the Canada-France-Hawai’i Telescope (CFHT) . UMa3/U1 was first spotted by the CFHT ‘s Ultraviolet Near Infrared Optical Northern Survey (UNIONS) .
“The results of the research are potentially
The scientists then chose to study the galaxy more closely using the other observatory, which houses the Deep Imaging Top 5 e-pos loodgenerering taktiek Beste praktyke om te volg Multi-Object Spectrograph (DEIMOS) . Fellow scientist Marla Geha also contributed to the study. She explains: ” UMa3/U1 contains so few stars that it could well be a random grouping of similar stars.
However, the DEIMOS measurements asb directory clearly show that this is not the case. For example, all the stars are moving at more or less the same speed and share similar chemical compositions.significant, because they could support the Lambda Cold Dark Matter (LCDM) model.
