Do Galaxy Clusters follow De Vaucouleurs' Law?

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Discussion Overview

The discussion revolves around whether galaxy clusters exhibit luminosity or mass profiles that conform to De Vaucouleurs' Law, particularly in the context of hierarchical structure formation in the universe. The focus includes theoretical implications and the characteristics of specific galaxy clusters, such as the Coma Cluster.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants propose that if the universe's structures are hierarchical, one might expect galaxy clusters to follow the same profile as elliptical galaxies.
  • Others question the assumption that galaxy clusters would necessarily conform to De Vaucouleurs' Law, seeking clarification on the reasoning behind this expectation.
  • A participant studying the Coma Cluster expresses uncertainty about what alternative laws might describe the luminosity or mass profile of galaxy clusters if they do not follow De Vaucouleurs' Law.
  • One participant admits they cannot provide an answer regarding the alternative laws applicable to galaxy clusters.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there are competing views regarding the applicability of De Vaucouleurs' Law to galaxy clusters and uncertainty about alternative models.

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If objects in the universe are built hierarchically, wouldn't one expect a Galaxy Cluster that is roughly spherical to follow the same profile as an elliptical galaxy?
 
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Not necessarily. Can I ask what makes you think that?
 
Drakkith said:
Not necessarily. Can I ask what makes you think that?
I'm studying the Coma Cluster. If they don't follow De Vaucouleurs' Law, which law describes the luminosity or mass profile for a cluster of galaxies?
 
That I can't answer.
 

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