- #1
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Dark matter is distributed in halos around visible galaxies, while baryon matter is distributed in spiral-shaped visible galaxies. Where does this difference come from?
Why do dark matter and baryon matter have different distributions?
- Context: Undergrad
- Thread starter Demystifier
- Start date
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Discussion Overview
The discussion revolves around the differing distributions of dark matter and baryon matter in the universe, focusing on the implications of their physical properties and interactions. The scope includes theoretical considerations and conceptual clarifications regarding the nature of these two types of matter.
Discussion Character
- Exploratory, Conceptual clarification, Debate/contested
Main Points Raised
- Some participants propose that baryon matter can radiate energy through electromagnetic interactions, which allows it to clump together in more tightly bound systems compared to dark matter.
- Others note that dark matter does not radiate, which is a fundamental characteristic that influences its distribution around galaxies.
- A later reply emphasizes that while dark matter does not radiate, there may be nuances regarding its interactions, suggesting a potential for very weak radiation.
- One participant references a paper that discusses the implications of dark matter's non-radiative nature, although the specific details of the paper are not elaborated upon in the discussion.
- Another participant introduces a light-hearted analogy related to dark matter, indicating a playful engagement with the topic.
Areas of Agreement / Disagreement
Participants express differing views on the implications of dark matter's non-radiative properties and baryon matter's ability to clump. The discussion remains unresolved with multiple competing perspectives on the topic.
Contextual Notes
There are limitations regarding the assumptions made about the interactions of dark matter and baryon matter, as well as the definitions of terms used in the discussion. The nuances of radiation and its effects on matter distribution are not fully explored.
- #2
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Baryon matter has the ability to radiate away energy through its electromagnetic interactions, which leads to the ability to clump together in more tightly bound systems.
Edit: Also, not all galaxies are spiral galaxies, but they are generally more tightly bound than their halos.
Edit: Also, not all galaxies are spiral galaxies, but they are generally more tightly bound than their halos.
- #3
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Your question gives me the chance to cite one a fun paper. Dark matter doesn't radiate of course. If it did it wouldn't be dark. The consequences of that are given in the paper.
The picture above is from a very entertaining paper, The Potato Radius: a Lower Minimum Size for Dwarf Planets you might have fun reading it.
The picture above is from a very entertaining paper, The Potato Radius: a Lower Minimum Size for Dwarf Planets you might have fun reading it.
- #4
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Caveat: At least not very strongly.anorlunda said:
- #5
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The question and answer remind me of the fuzzy wuzzy poem.Orodruin said:Caveat: At least not very strongly.
If I was more literate, I could make an analogous poem about dark matter.Similar threads
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