Oppenheimer-Snyder model of star collapse

In summary, the conversation in posts #103, #104, #107, and #108 of the thread mentioned the Oppenheimer-Snyder model as a more plausible model than the Schwarzschild spacetime. However, there is disagreement over the interpretation of the exterior Schwarzschild solution and its inclusion of the Kruskal-Szekeres diagram. The O-S model is a highly idealized model and the conditions required for its validity have not been ruled out theoretically or empirically. The model only considers a portion of the maximally extended Schwarzschild spacetime, which is why it is not considered a plausible model.
  • #141
pervect said:
[..] there's opportunity to apply the exact same arguments to other situations involving event horizons that don't involve black holes. Specifically, the Rindler horizon. These would be difficult to test with our current technology, though. The experiment is interesting, so I'll spell it out in more detail, since I've been alluding it to some time in the belief it was obvious (but perhaps it isn't to you? )

The experiment involves launching a spaceship that accelerates at 1g for a year shiptime - or .1g for 10 years shiptime - or .001 g for 1000 years shiptime. [..]
harrylin said:
[..] Regretfully more than ever the discussion is hindered by incompatible definitions based on different schools of teaching. I intend to do a "retake" of that illustration in the new thread, with a brief summary of comments by different people, including yours. [..].
The new thread: https://www.physicsforums.com/showthread.php?p=4181348
 
<h2>1. What is the Oppenheimer-Snyder model of star collapse?</h2><p>The Oppenheimer-Snyder model is a theoretical model proposed by physicists J. Robert Oppenheimer and H. Snyder in 1939 to describe the gravitational collapse of a massive star into a black hole.</p><h2>2. How does the Oppenheimer-Snyder model explain star collapse?</h2><p>The model describes the collapse of a star as a continuous process, with the star's mass and density increasing as it collapses under its own gravity. As the star's density approaches infinity, it forms a singularity, which is surrounded by an event horizon, creating a black hole.</p><h2>3. What are the assumptions made in the Oppenheimer-Snyder model?</h2><p>The model assumes that the star is spherically symmetric, that the matter in the star is incompressible, and that the star is not rotating. It also assumes that the collapse is happening in a vacuum, with no external forces acting on the star.</p><h2>4. What are the limitations of the Oppenheimer-Snyder model?</h2><p>The model does not take into account the effects of quantum mechanics, which are important in describing the behavior of matter at high densities. It also does not consider the effects of rotation or magnetic fields on the collapse process. Additionally, the model does not account for the formation of jets or other structures that may occur during the collapse.</p><h2>5. How does the Oppenheimer-Snyder model contribute to our understanding of black holes?</h2><p>The Oppenheimer-Snyder model was the first successful attempt at describing the formation of a black hole from the collapse of a massive star. It has provided a framework for further research and has contributed to our understanding of the properties and behavior of black holes.</p>

1. What is the Oppenheimer-Snyder model of star collapse?

The Oppenheimer-Snyder model is a theoretical model proposed by physicists J. Robert Oppenheimer and H. Snyder in 1939 to describe the gravitational collapse of a massive star into a black hole.

2. How does the Oppenheimer-Snyder model explain star collapse?

The model describes the collapse of a star as a continuous process, with the star's mass and density increasing as it collapses under its own gravity. As the star's density approaches infinity, it forms a singularity, which is surrounded by an event horizon, creating a black hole.

3. What are the assumptions made in the Oppenheimer-Snyder model?

The model assumes that the star is spherically symmetric, that the matter in the star is incompressible, and that the star is not rotating. It also assumes that the collapse is happening in a vacuum, with no external forces acting on the star.

4. What are the limitations of the Oppenheimer-Snyder model?

The model does not take into account the effects of quantum mechanics, which are important in describing the behavior of matter at high densities. It also does not consider the effects of rotation or magnetic fields on the collapse process. Additionally, the model does not account for the formation of jets or other structures that may occur during the collapse.

5. How does the Oppenheimer-Snyder model contribute to our understanding of black holes?

The Oppenheimer-Snyder model was the first successful attempt at describing the formation of a black hole from the collapse of a massive star. It has provided a framework for further research and has contributed to our understanding of the properties and behavior of black holes.

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