All articles tagged with #satellite galaxies
New research suggests the Milky Way may have 80 to 100 more faint satellite galaxies than currently observed, supporting the Lambda Cold Dark Matter theory, with future telescopes like the Rubin Observatory expected to help detect these elusive objects.
Recent research from the Satellites Around Galactic Analogs (SAGA) survey reveals that the Milky Way is unusual compared to similar galaxies, as it has fewer satellite galaxies, many of which have stopped forming stars. This anomaly suggests a unique evolutionary history for our galaxy, potentially linked to its dark matter halo. The findings challenge current models of galaxy formation and highlight the need to study a broader range of galaxies to understand these processes.
Recent studies from the SAGA Survey reveal that the Milky Way is an outlier among similar-sized galaxies, with fewer satellite galaxies and unique star formation patterns. The research highlights the need to study a broader range of galaxies to better understand galaxy formation and the role of dark matter. The findings suggest that the Milky Way's evolutionary history is distinct, with its smaller satellites having ceased star formation, unlike those in other galaxies.
The Milky Way galaxy has approximately 60 known satellite galaxies orbiting it within a distance of 1.4 million light-years, though this number is continually updated as new discoveries are made. These satellite galaxies, including the visible Large and Small Magellanic Clouds, are often faint and require advanced telescopes to detect. Over time, the Milky Way's gravitational pull may eventually consume these smaller galaxies, as it has done with others in the past.
Observations of the motion of satellite galaxies around massive galaxy groups suggest that the universe may be younger than predicted by the standard cosmological model with Planck cosmological parameters. Research using data from the Sloan Digital Sky Survey (SDSS) indicates a notable excess of correlated satellite pairs, implying that massive galaxy groups are younger in the real universe compared to current simulations. These findings challenge the existing cosmological model and may provide insights into the Hubble tension problem.
A recent study has summarized various methods to determine the mass of the Milky Way, including measuring the motion of stars, globular clusters, satellite galaxies, tidal plumes of dwarf galaxies, and stars leaving the galaxy. The team took a statistical average of these methods and determined the best value for the mass of the galaxy to be a trillion solar masses, give or take a few hundred billion solar masses. These methods rely on orbital motion and have varying levels of accuracy, but they all suggest that most of the galaxy's mass is in the form of dark matter.