Discussion Overview
The discussion centers on the time required for galaxy formation, particularly in the context of high redshift galaxies (Z=20) and the implications of relativistic time dilation. Participants explore various aspects of galaxy formation, including potential differences in formation rates shortly after the Big Bang and the relevance of gas density during that period.
Discussion Character
- Exploratory
- Debate/contested
- Technical explanation
Main Points Raised
- Some participants inquire about the consensus on the time needed for galaxy formation, particularly for galaxies at high redshift (Z=20).
- There is a suggestion that galaxy formation may have been quicker shortly after the Big Bang due to higher gas densities.
- Relativistic time dilation is discussed, with some questioning its relevance in estimating galaxy formation time in terms of present-day years.
- One participant asserts that the time used in cosmology is FLRW coordinate time, which is consistent for comoving observers and does not require adjustments for relativistic effects.
- Another participant expresses interest in whether current models of galaxy formation align with the age of the Universe, indicating a concern about the consistency of theoretical predictions with observational data.
- Some participants acknowledge the historical context of the topic, noting that it has been a significant area of research with evolving theories and models.
- There is a mention of the correlation between galaxies and central quasars, suggesting that this relationship may be relevant to the discussion of galaxy formation times.
Areas of Agreement / Disagreement
Participants express varying opinions on the impact of relativistic time dilation and the speed of galaxy formation after the Big Bang. There is no clear consensus on the time required for galaxy formation or the relevance of relativistic effects, indicating ongoing debate and uncertainty in the topic.
Contextual Notes
Some discussions reference specific redshift values and their implications for gas density, but the assumptions and definitions surrounding these values are not fully explored. The relationship between theoretical models and observational data remains unresolved.