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Galaxy Dynamics

All articles tagged with #galaxy dynamics

Milky Way Lies in a Hidden Plane of Dark Matter
space16 days ago

Milky Way Lies in a Hidden Plane of Dark Matter

New simulations indicate the Milky Way sits inside a vast, flattened sheet of matter dominated by dark matter, extending tens of millions of light-years. This planar mass distribution helps explain why nearby galaxies mostly drift away rather than be drawn toward the Milky Way, matching the observed motions of over 30 neighboring galaxies. Further observations will show whether such cosmic sheets are common elsewhere and how they shape galaxy formation.

via BBC Sky at Night Magazine|
#cosmology#dark-matter#galaxy-dynamics
Milky Way Resides on a Giant Dark Matter Sheet, Redrawing Local Cosmology
space3 months ago

Milky Way Resides on a Giant Dark Matter Sheet, Redrawing Local Cosmology

New simulations suggest the Milky Way sits within a flat, sheet-like dark matter structure spanning tens of millions of light-years, damping inbound galaxy motions and solving long-standing mass and velocity discrepancies that spherical models could not explain. The sheet aligns with the Supergalactic Plane and implies a higher Local Group mass (~3.3 ± 0.6 trillion solar masses) within a broader anisotropic dark matter geometry that shapes the nearby cosmos and possibly early-universe structure.

via The Daily Galaxy|
#dark-matter#dark-matter-sheet#galaxy-dynamics
Local Group Lies in a Giant Dark-Matter Sheet, New Study Finds
science3 months ago

Local Group Lies in a Giant Dark-Matter Sheet, New Study Finds

A Nature Astronomy study using a virtual twin of the Local Group proposes that the Milky Way and its neighboring galaxies are embedded in a vast, sheet-like distribution of dark matter bordered by cosmic voids. This flat geometry could explain peculiar motions that spherical dark matter halos struggle to account for, with simulations aligning with observed galaxy dynamics.

via Yahoo|
#andromeda#dark-matter#galaxy-dynamics
Local Group Hidden in a Vast Dark Matter Sheet, Study Suggests
space3 months ago

Local Group Hidden in a Vast Dark Matter Sheet, Study Suggests

A Nature Astronomy study proposes that the Milky Way and its Local Group are embedded in a gigantic flat sheet of dark matter, with mass concentrated at the sheet's edges and voids beyond. Using a simulated “virtual twin” of the group, the researchers show this geometry can explain peculiar motions that spherical halos can't, aligning local dynamics with the broader cosmological model and offering the first assessment of dark matter distribution in our neighborhood.

via Futurism|
#cosmology#dark-matter#galaxy-dynamics
New Study Confirms Dark Matter Follows Gravity Like Ordinary Matter
science6 months ago

New Study Confirms Dark Matter Follows Gravity Like Ordinary Matter

A recent study analyzing 12 dwarf galaxies provides strong evidence supporting the existence of dark matter, challenging alternative theories like Modified Newtonian Dynamics (MOND). The findings show that the gravitational fields of these galaxies cannot be explained by visible matter alone, reinforcing the dark matter hypothesis and narrowing the search for its nature.

via Universe Today|
#cosmology#dark-matter#dwarf-galaxies