Undergrad Why is the DM density near the sun so small?

[Buzz Bloom]

This question arose in the context of another thread.

https://www.physicsforums.com/threa...tter-in-the-solar-system.900573/#post-5669854​

Wikipedia gives an estimated value for the DM density near the sun of

0.35 × GeV/cm³ = 6.2 ×10⁻²⁵ g/cm³.​

The value of the average DM density in the universe

ρ_DM = 2.26 ×10⁻²⁴ g/cm³.
https://en.wikipedia.org/wiki/Milky_Way - Bottom of list of Observation data​

This means that ρ_DM is approximately 3.6 times the density of DM near the sun.

I unsuccessfully have tried to find references that provide an answer to the question, but my skills are not up to the challenge. I am hopeful that one or more knowledgeable participants here the PFs can help me.

Regards,
Buzz

 

[mfb]

The average density in the universe is 2.26*10^-30 g/cm³, 4.5 orders of magnitude thinner than the local density. I guess you mixed cm³ and m³, as the number is equal to 2.26*10^-24 g/m³.

http://pdg.ge.infn.it/2015/reviews/rpp2014-rev-astrophysical-constants.pdf

 

[Buzz Bloom]

Hi @mfb:
Thank you very much for spoting and letting me know about my careless error.

Regards,
Buzz