Discussion Overview
The discussion revolves around the question of whether there is a maximum mass for a black hole, exploring calculations related to black hole mass, the implications of general relativity, and the nature of black holes themselves. The conversation includes theoretical considerations, calculations, and conceptual debates.
Discussion Character
- Exploratory
- Technical explanation
- Conceptual clarification
- Debate/contested
- Mathematical reasoning
Main Points Raised
- One participant initially calculated the mass of the Milky Way's black hole as 1.8x10e+53 kg, expressing confusion over the result.
- Another participant corrected this calculation, suggesting the mass is closer to 10^{37} kg and stating there is no theoretical maximum size for a black hole, except possibly the total mass-energy of the observable universe.
- Participants discussed the importance of using general relativity for accurate calculations of black hole mass, as Newtonian physics may lead to significant errors.
- One participant acknowledged an error in their calculation, later arriving at a mass of about 2e41 kg, while noting the simplifications made in their approach.
- Concerns were raised about the significance of the mass of the rest of the galaxy in calculations of the black hole's mass, with one participant emphasizing that the black hole's mass should be determined using objects much closer to it.
- Several participants debated the nature of black holes, with some arguing that if black holes occupy space, there must be a maximum mass, while others countered that the event horizon's properties do not imply a critical mass point.
- Discussions included the relationship between the observable diameter of a black hole and its mass, with some asserting that larger black holes have larger event horizons, while others questioned the implications of this relationship.
- Participants expressed differing views on whether the infalling material towards a black hole constitutes a "flowing structure" and debated the concept of a "critical mass point" for black holes.
- Some participants suggested that changes may occur within or outside a black hole at certain mass values, while others remained skeptical about the rigidity of the concept of black holes.
Areas of Agreement / Disagreement
The discussion contains multiple competing views regarding the existence of a maximum mass for black holes, the implications of their structure, and the validity of calculations made using different physical theories. No consensus has been reached.
Contextual Notes
Participants noted limitations in their calculations, including assumptions made about the mass of the galaxy and the effects of general relativity. The discussion reflects ongoing uncertainty and exploration of the topic.