New unbiased technique for the measure of the local dark matter density

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SUMMARY

The discussion centers on the recent findings regarding the local dark matter density near the Sun, led by researcher Silvia Garbari. The study indicates a 99% confidence level that dark matter exists in this region, with a notable density that exceeds previous expectations at a 90% confidence level. This suggests potential evidence for a dark matter disc in the Milky Way or a squashed dark matter halo, which could significantly impact our understanding of galaxy formation. The implications of these findings are profound, pending further confirmation from future data.

PREREQUISITES
  • Understanding of dark matter concepts and theories
  • Familiarity with statistical confidence levels in scientific research
  • Knowledge of galaxy formation theories and simulations
  • Experience with academic research papers and publications, particularly in astrophysics
NEXT STEPS
  • Research the implications of dark matter density on galaxy formation theories
  • Explore the methodologies used in Garbari's studies, particularly in measuring dark matter
  • Examine the significance of statistical confidence levels in astrophysical research
  • Review related publications in the Monthly Notices of the Royal Astronomical Society (MNRAS)
USEFUL FOR

Astronomers, astrophysicists, and researchers interested in dark matter, as well as students and enthusiasts seeking to understand the implications of recent findings on galaxy structure and formation.

drrail
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Plenty of Dark Matter Near the Sun

http://www.sciencedaily.com/releases/2012/08/120809090423.htm

Evidence for dark matter near the sun

"We are 99% confident that there is dark matter near the Sun," says the lead author Silvia Garbari. In fact, if anything, the authors' favored dark matter density is a little high: they find more dark matter than expected at 90% confidence. There is a 10% chance that this is merely a statistical fluke, but if future data confirms this high value the implications are exciting as Silvia explains: "This could be the first evidence for a "disc" of dark matter in our Galaxy, as recently predicted by theory and numerical simulations of galaxy formation, or it could mean that the dark matter halo of our galaxy is squashed, boosting the local dark matter density."

He is 99% confident with a 90% confidence level.
 
Astronomy news on Phys.org
Thanks for pointing this article out!
Here is a list of papers by Garbari and Lake et al.
http://arxiv.org/find/grp_physics/1/AND+au:+Garbari+au:+Lake/0/1/0/all/0/1
Several are or will be published in MNRAS
Here is a link to one they posted in June:
http://arxiv.org/abs/1206.0015
One of those mentioned in your Science Daily news item is apparently too recent to show up here but perhaps will in a few days.


drrail said:
Plenty of Dark Matter Near the Sun

http://www.sciencedaily.com/releases/2012/08/120809090423.htm

Evidence for dark matter near the sun

"We are 99% confident that there is dark matter near the Sun," says the lead author Silvia Garbari. In fact, if anything, the authors' favored dark matter density is a little high: they find more dark matter than expected at 90% confidence. There is a 10% chance that this is merely a statistical fluke, but if future data confirms this high value the implications are exciting as Silvia explains: "This could be the first evidence for a "disc" of dark matter in our Galaxy, as recently predicted by theory and numerical simulations of galaxy formation, or it could mean that the dark matter halo of our galaxy is squashed, boosting the local dark matter density."

He is 99% confident with a 90% confidence level.
 
drrail said:
He is 99% confident with a 90% confidence level.
No, pay attention:
- "We are 99% confident that there is dark matter ..."
- "... more dark matter than expected at 90% confidence."

But of course if you expected no dark matter then it might sound like that.:wink:
 

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