Is dark matter distrubition always near galaxies?

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Discussion Overview

The discussion centers on the distribution of dark matter in relation to baryonic matter, specifically whether dark matter exists in regions devoid of galaxies and other baryonic matter. Participants explore the nature of dark matter's presence in the universe, including its potential locations and density variations.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants propose that dark matter exists in strands and filaments throughout the cosmos, suggesting it can be present in areas with little or no baryonic matter.
  • Others argue that dark matter can be detected in regions lacking baryonic matter through gravitational lensing.
  • A participant cites research indicating that dark matter permeates voids in the universe, implying that intergalactic space is not empty but filled with dark matter.
  • Another participant reiterates that dark matter is ubiquitous, being more dense in certain areas, but present everywhere.

Areas of Agreement / Disagreement

Participants generally agree that dark matter is present in regions without baryonic matter, but there are competing views regarding its distribution and density. The discussion remains unresolved regarding the specifics of dark matter's presence in empty space.

Contextual Notes

Limitations include the dependence on definitions of dark matter and baryonic matter, as well as the unresolved nature of the mechanisms by which dark matter is detected in various regions.

RyanH42
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Is there any dark matter where no baryonic matter (which here the galaxies).I mean are we observe dark matter only around the matter ? Or dark matter can be anywhere (In empty space which there's no baryonic matter around)
 
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Yes it is thought that dark matter exists in the from of strands and filaments throughout the cosmos, much of it being where there is very little of ordinary baryonic matter present.
Because DM does interact gravitationally. galaxies tend to be present where these DM strands are more dense.
This link though not an academic reference might be helpful in explaining further.
http://www.space.com/16412-dark-matter-filament-galaxy-clusters.html
 
Last edited:
thank you
 
We can detect dark matter where little or no baryonic matter exists by virtue of gravitational lensing.
 
Cosmologists at Penn Weigh Cosmic Filaments and Voids'
http://www.upenn.edu/pennnews/news/cosmologists-penn-weigh-cosmic-filaments-and-voids

"Dark matter ... permeates all the way to the center of the voids."

'No Empty Space in the Universe --Dark Matter Discovered to Fill Intergalactic Space'
http://www.dailygalaxy.com/my_weblog/2012/02/no-empty-space-in-the-universe-dark-matter-discovered-to-fill-intergalactic-space-.html

"A long standing mystery on where the missing dark matter is has been solved by the research. There is no empty space in the universe. The intergalactic space is filled with dark matter."
 
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RyanH42 said:
Is there any dark matter where no baryonic matter (which here the galaxies).I mean are we observe dark matter only around the matter ? Or dark matter can be anywhere (In empty space which there's no baryonic matter around)
As wess pointed out, dark matter is everywhere. It's just more dense in some places.
 

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