another DM radio
- notFritzArgelander
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another DM radio
https://phys.org/news/2019-10-physicists-dark.html
and here's the earlier (by a few weeks) idea.
viewtopic.php?f=74&t=3393
The new idea seems to have interesting advantages.
- GCoyote
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Re: another DM radio
Gary C
Celestron Astro Master 130mm f5 Newtonian GEM
Meade 114-EQ-DH f7.9 Newtonian w/ manual GEM
Bushnell 90mm f13.9 Catadioptric
Gskyer 80mm f5 Alt/Az refractor
Jason 10x50 Binoculars
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Svbony 2.1x42 Binoculars
(And a bunch of stuff I'm still trying to fix or find parts for.)
- notFritzArgelander
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Re: another DM radio
The axion signal would be just a single very narrow line source. A remote location like Antarctica or space might be best to clean up background noise, if the narrowness itself itself is insufficient.GCoyote wrote: ↑Sun Oct 13, 2019 2:41 pm So I looked back at the earlier article and it appears this new proposal gives a device that can scan the entire allowed range of axion masses. That however looks like a pretty busy region of the spectrum. What else could you use to discriminate between the axion signal and other sources?
- GCoyote
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Re: another DM radio
Gary C
Celestron Astro Master 130mm f5 Newtonian GEM
Meade 114-EQ-DH f7.9 Newtonian w/ manual GEM
Bushnell 90mm f13.9 Catadioptric
Gskyer 80mm f5 Alt/Az refractor
Jason 10x50 Binoculars
Celestron 7x50 Binoculars
Svbony 2.1x42 Binoculars
(And a bunch of stuff I'm still trying to fix or find parts for.)
- notFritzArgelander
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Re: another DM radio
I would expect that it wouldn't be that isotropic. Rather there would be a dipole anisotropy at the very least corresponding to the motion of the Sun about the MW center. The axions we'd detect would be from the MW halo which doesn't rotate much. The Sun's motion would induce a blue shift in the direction of the Sun's way and a red shift in the opposite direction.
- GCoyote
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Re: another DM radio
Gary C
Celestron Astro Master 130mm f5 Newtonian GEM
Meade 114-EQ-DH f7.9 Newtonian w/ manual GEM
Bushnell 90mm f13.9 Catadioptric
Gskyer 80mm f5 Alt/Az refractor
Jason 10x50 Binoculars
Celestron 7x50 Binoculars
Svbony 2.1x42 Binoculars
(And a bunch of stuff I'm still trying to fix or find parts for.)
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