Researchers have unraveled a long-standing cosmic enigma surrounding the arrangement of satellite galaxies around the Milky Way. Contrary to initial perplexity, a thin, rotating plane of 11 'classical' satellite galaxies encircling our galaxy has puzzled cosmologists, seemingly defying standard models.
Dubbed the 'plane of satellites problem,' this odd arrangement challenges the conventional understanding of dark matter and cosmology. However, a recent study published in Nature Astronomy provides clarity. By combining the unique spatial distribution of the satellites with the temporary alignment of distant satellites Leo I and Leo II, scientists present a solution.
Using Gaia's precise motion data, the team discovered that such orbital alignments are more common than initially thought. They demonstrated that the satellite galaxy plane is transient, not rotationally sustained. Comparing their findings with new simulations, they revealed that these transient planes are typical and well-aligned with the expectations of the standard cosmological model (ΛCDM).
This breakthrough not only unravels the 'plane of satellites problem' but also bolsters confidence in the broader framework of the ΛCDM model and the role of dark matter in shaping the cosmos.
