Virial thereom as applied to clusters of galaxies

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SUMMARY

The virial theorem is not applicable to the majority of galaxy clusters due to the insufficient number of member galaxies, which hinders effective mass calculation. This conclusion is supported by a 1983 article by Marc Davis from UC Berkeley published in the Astrophysical Journal. While the virial theorem fails in this context, galaxy masses can still be estimated using their rotation curves. This distinction is crucial for astrophysicists studying galaxy dynamics.

PREREQUISITES
  • Understanding of the virial theorem in astrophysics
  • Familiarity with galaxy cluster dynamics
  • Knowledge of rotation curves and their significance in mass estimation
  • Awareness of historical astrophysical literature, specifically the work of Marc Davis
NEXT STEPS
  • Research the limitations of the virial theorem in astrophysical applications
  • Study the methods for estimating galaxy masses using rotation curves
  • Examine the differences between galaxy clusters and superclusters
  • Read the 1983 article by Marc Davis in the Astrophysical Journal for in-depth insights
USEFUL FOR

Astronomers, astrophysicists, and students of physics interested in the dynamics of galaxy clusters and the application of the virial theorem in cosmology.

alantheastronomer
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I'd just like to comment if I may - The virial thereom is not applicable to clusters of galaxies as the numbers of member galaxies in the majority of clusters (as opposed to superclusters) are too small for the virial thereom to effectively calculate the cluster mass. There is a short article to that effect by Marc Davis from UC Berkeley in the Astrophysical Journal circa 1983. Masses of member galaxies can still be estimated using their rotation curves however...
 
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alantheastronomer said:
I'd just like to comment if I may - The virial thereom is not applicable to clusters of galaxies as the numbers of member galaxies in the majority of clusters (as opposed to superclusters) are too small for the virial thereom to effectively calculate the cluster mass. There is a short article to that effect by Marc Davis from UC Berkeley in the Astrophysical Journal circa 1983. Masses of member galaxies can still be estimated using their rotation curves however...
Welcome to the forum.

Putting such a post here in the intro section, where what you were SUPPOSED to put was an actual intro to yourself, is fairly pointless since, although such an intro is a requirement, it is not much looked at. If you want to generate an actual discussion, you should post in the appropriate forum.
 
Here's my intro - I have a Masters in Physics from Adelphi University and a Master's in Astrophysics from the University of Illinois at Urbana-Champaign. I'm currently not affiliated with any institution.
 

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