Constraining Dark Energy through the Stability of Cosmic Structures

Understand

For a general dark-energy equation of state, we estimate the maximum possible radius of massive structures that are not destabilized by the acceleration of the cosmological expansion.

• A comparison with known stable structures constrains the equation of state.
• The robustness of the constraint can be enhanced through the accumulation of additional astrophysical data and a better understanding of the dynamics of bound cosmic structures.