Is there a maximum mass for a black hole?

Click For Summary
SUMMARY

The discussion centers on the mass of black holes, specifically addressing the misconception that there is a maximum mass for black holes. The calculated mass of the supermassive black hole (SMBH) at the center of the Milky Way is approximately 1037 kg, significantly lower than erroneous calculations suggesting 1.8x1053 kg. It is established that while there is no theoretical maximum mass for black holes, the mass-energy of the observable universe may impose practical limits. Calculations using Newtonian physics are inadequate for accurately determining black hole mass, necessitating the use of general relativity.

PREREQUISITES
  • Understanding of general relativity and its implications for black hole physics
  • Familiarity with Newtonian physics and its limitations in astrophysical contexts
  • Knowledge of gravitational force calculations, including the use of the gravitational constant (G)
  • Basic comprehension of astronomical units such as parsecs and kiloparsecs
NEXT STEPS
  • Research the Schwarzschild radius and its relationship to black hole mass
  • Study the implications of general relativity on black hole formation and behavior
  • Explore the concept of escape velocity in the context of neutron stars and black holes
  • Investigate the effects of dark matter on gravitational calculations in galactic centers
USEFUL FOR

Astronomers, astrophysicists, and students of physics interested in black hole dynamics, gravitational theories, and the complexities of mass calculations in relativistic contexts.

  • #91
hubble_bubble said:
If you study the article in the link in #83 then this is what happens. Also mass is increased as if out of nowhere which is what I had found and didn't believe. This research ties cold dark matter to black holes.

This has nothing to do with gravity itself, but only on our way of calculating its effects in the domain of very high gravitational force. The apparent increase is based against Newtonian gravity which is already known to be incorrect, but since it is MUCH easier to use than General Relativity it is the choice for most calculations. As the paper shows it ceases to be accurate in regions of very high mass. Interestingly they say that their equation accurately predicts gravity using a constant factor.
 
Astronomy news on Phys.org
  • #92
I am now in the position where time could flow either forwards or backwards with a swap of the functions of space and time into what could be termed timespace. Going backwards would increase the mass of the universe and have the same energy and mass existing twice which I really don't believe. Moving forward would make more sense. Lorentz transforms of spacetime into timespace would have to modify beta, t and x at least. Whether this would even be possible I don't know. Even worse this is using the standard configuration. There would also need to be movement of the singularity through a stretched timespace as mass increases. This would need to be proportional to the Schwarzschild radius somehow although who knows how you compute this.

The forward moving mass would only be partially present at any spacetime point in the external universe and mass would seem less than expected. Yet at some future time this mass will resolve itself and again become "available" I think.
 
  • #94
The relationship of the frame dragging should be described by the relationship 2lp/tp where tp = Planck time and lp = Planck length. If anyone disagrees or thinks I am too off the wall please let me know.
 
Last edited:
  • #95
Closed pending moderation.
 

Similar threads

  • · Replies 13 ·
Replies
13
Views
3K
  • · Replies 7 ·
Replies
7
Views
4K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 17 ·
Replies
17
Views
5K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K