Average size of the biggest G-bound structures in the Universe

Click For Summary
SUMMARY

The discussion centers on the future of gravitationally bound structures in the Universe post-Dark Energy. It concludes that after the Universe's expansion accelerates, Hubble spheres will predominantly contain either one or zero gravitationally bound structures. Galaxy clusters are identified as the initial remnants, while over extensive timescales, the remaining structures will likely be single solid objects or black holes. The instability of orbits leads to the merging or ejection of objects from these systems, particularly affecting superclusters over shorter timescales.

PREREQUISITES
  • Understanding of Dark Energy and its implications on cosmic expansion
  • Familiarity with gravitational binding and the concept of Hubble spheres
  • Knowledge of galaxy clusters and their role in cosmic structure formation
  • Basic concepts of orbital mechanics and stability in astrophysics
NEXT STEPS
  • Research the effects of Dark Energy on cosmic structures and future scenarios
  • Explore the dynamics of galaxy clusters and their evolution over time
  • Investigate the concept of superclusters and their gravitational binding properties
  • Study orbital mechanics in the context of long-term stability of astrophysical objects
USEFUL FOR

Astronomers, astrophysicists, and cosmologists interested in the long-term evolution of the Universe and the fate of gravitationally bound structures.

tzimie
Messages
256
Reaction score
27
After Dark Energy will tear our Universe apart, every Hubble sphere would contain only 1 or 0 gravitationally bound structures. What is an average size of such structures? (As I understand, galaxy clusters are the "seeds" of such remnants?)
 
  • Like
Likes   Reactions: timmdeeg
Space news on Phys.org
Over very long timescales: single solid objects or single black holes. All orbits are unstable over sufficiently long timescales, so objects tend to either merge or get ejected from gravitationally bound systems.

Over not that long timescales: somewhere at the scale of superclusters, what exactly will stay bound is still subject of discussion.
 

Similar threads

Undergrad Expansion-Collapse cycle in cosmological structures?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad More extended equilibrium configurations due to dark energy?
  • · Replies 19 ·
Replies
19
Views
3K
High School Expansion of the Universe
  • · Replies 9 ·
Replies
9
Views
3K
Undergrad Sachs-Wolfe effect in a Dark Energy universe?
  • · Replies 1 ·
Replies
1
Views
2K
High School Estimates — True Size of the Universe?
  • · Replies 33 ·
2
Replies
33
Views
8K
High School Does dark energy or cosmic inflation explain flatness?
  • · Replies 37 ·
2
Replies
37
Views
6K
Undergrad Mining the Universe's expansion?
  • · Replies 25 ·
Replies
25
Views
3K
Undergrad New Hubble Paper On Lensing In Galactic Clusters
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad What if the Universe expands faster than the speed of light?
  • · Replies 19 ·
Replies
19
Views
5K
High School Why doesn't cosmic inflation violate conservation of energy?
  • · Replies 3 ·
Replies
3
Views
4K