Dark Matter Daggers?
- AntennaGuy
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Dark Matter Daggers?
* Celestron C6 SCT on a Twilight 1 Alt-Az mount
Prof. Barnhardt to Klaatu in The Day the Earth Stood Still: "There are several thousand questions I'd like to ask you.”
- notFritzArgelander
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Re: Dark Matter Daggers?
It seems odd because it is relying on a model for cold dark matter that goes way beyond what is needed to explain the observations that seem to require DM's existence. It requires DM to form macroscopic objects. This is an unnecessary extra property that has been becoming disfavored as observations accumulate.
MACHOs (massive compact halo objects) were once thought possible. A thorough survey staring at the
One can see this by looking at hot dark matter, i.e. neutrinos. Several kgs rest mass of neutrinos in a tabletop sized assembly would really play havoc with a human body or the chemistry of any matter it encountered similarly to the cold dark matter under discussion in the article. However each cubic centimeter of your body has at least 300 neutrinos passing through uneventfully every second. As long as cold dark matter is in individual elementary particles, it's similarly harmless.
- The Happy Parrot
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Re: Dark Matter Daggers?
- notFritzArgelander
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Re: Dark Matter Daggers?
It has been through a succession of upgrades and improvements without, so far, finding a signal. The latest version XENONnT is going to be so sensitive that in some parts of the energy range the background of neutrinos from the cosmic background will hide any possible signal.The Happy Parrot wrote: ↑Sat Mar 28, 2020 11:49 am What happened with the xenon dark matter collaboration? This was a large xenon tank under a deep mine in Italy designed to detect dark matter. Have they presented any results?
https://en.wikipedia.org/wiki/XENON
The experiment is designed to find WIMPs only. It does nothing to rule out other possible dark matter candidates.
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Re: Dark Matter Daggers?
Point taken on the possibilities of WIMPs not being the only possibility for dark matter.
- notFritzArgelander
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Re: Dark Matter Daggers?
Using theThe Happy Parrot wrote: ↑Sat Apr 18, 2020 12:42 pm That is really neat nFA. They seem to have a serious case of aperture fever. The tanks are getting wider and longer with each iteration to catch those faint fuzzies.
Point taken on the possibilities of WIMPs not being the only possibility for dark matter.
- AntennaGuy
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Re: Dark Matter Daggers?
* Celestron C6 SCT on a Twilight 1 Alt-Az mount
Prof. Barnhardt to Klaatu in The Day the Earth Stood Still: "There are several thousand questions I'd like to ask you.”
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