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(Phys Org2)   Not to make light of a dark matter, but we need to talk about 3.5 keV   ( phys.org) divider line
    More: Interesting, Dark matter, dark matter particles, Particle physics, Electron, heavy dark matter, Dark Matter Annihilation, lightweight dark matter, visible matter  
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2038 clicks; posted to Geek » on 08 Feb 2018 at 4:50 PM (23 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2018-02-08 04:27:49 PM  
img.fark.netView Full Size

Sees what subby did there.
 
2018-02-08 04:48:57 PM  
That headline had...
img.fark.netView Full Size
 
2018-02-08 05:19:33 PM  
Subby you Goddamn Genius!
 
2018-02-08 05:37:49 PM  
Now, how can I Depok Chopra this shiat to sell penis pills?
 
2018-02-08 05:44:08 PM  
HOORAY!!!


/it wasn't a Forbes link.
 
2018-02-08 07:00:32 PM  
What'll really be fun is when the "dark matter" theory goes tits-up like "hyperspace".  Someday we'll have a better understanding of just wtf gravity.  Someday.  I'll probably be dead.  And there will, sadly, probably still be flat-earthers out there, but at least they might have the opportunity to travel to different discs out there in space.
 
2018-02-08 07:10:18 PM  
Why is it so unbelievably out there that a shiatload of neutrons could be floating near the galaxy
 
2018-02-08 07:36:07 PM  
Haha. This is too funny. I've just spent a week at a workshop on whether we have already detected the 3.5 keV line (https://www.lorentzcenter.nl/lc/web/​20​18/966/info.php3?wsid=966&venue=Snelli​us). I guess this thread is relevant to my interests?

Anyway, the bottom line of a week of discussions is that we should we cautious. We need more data to tell whether the signal is real and whether it's consistent with dark matter or a more conventional explanation (Sulfur 16 charge exchange with hydrogen). If it's real then it's pretty cool and we will be able to confirm it with a number of independent checks. If it's not then that's fine too!

That said, I'm happy to answer any science questions about it.
 
2018-02-08 07:48:47 PM  

govervich: I'm happy to answer any science questions about it.


Which day of Creation did God create neutrons on?

Okay, in all.seriousness, I'm curious if the consensus is that confirming that we have found these would be defacto proof of the existence of Dark Matter. Because that would be amazing.
 
2018-02-08 08:01:09 PM  

anustart: govervich: I'm happy to answer any science questions about it.

Which day of Creation did God create neutrons on?

Okay, in all.seriousness, I'm curious if the consensus is that confirming that we have found these would be defacto proof of the existence of Dark Matter. Because that would be amazing.


One detection of the 3.5 keV line isn't going to cut it. There is already another non-dark matter explanation that can explain at least part of the line in galaxy clusters which is an interaction of fully ionized sulfur with neutral hydrogen. However, there's also a bunch of null detections (ie lack of defections) in other clusters since the measurement is right on the border of what's possible. It didn't help that the Hitomi satellite blew up (https://en.m.wikipedia.org/wiki/Hito​mi​_(satellite)) which would have helped characterize the 3.5 keV line. Even with a confirmed detection it would take a measurement of it in a lab to fully convince us it's real. We are still a long way away from that and I'd say a lot of the Astro community is skeptical. Confirming that dark matter is real is a big deal and we want to get it right.
 
2018-02-08 08:30:13 PM  

govervich: Haha. This is too funny. I've just spent a week at a workshop on whether we have already detected the 3.5 keV line (https://www.lorentzcenter.nl/lc/web/2​018/966/info.php3?wsid=966&venue=Snell​ius). I guess this thread is relevant to my interests?

Anyway, the bottom line of a week of discussions is that we should we cautious. We need more data to tell whether the signal is real and whether it's consistent with dark matter or a more conventional explanation (Sulfur 16 charge exchange with hydrogen). If it's real then it's pretty cool and we will be able to confirm it with a number of independent checks. If it's not then that's fine too!

That said, I'm happy to answer any science questions about it.


What does cardboard taste like?
 
2018-02-08 09:02:39 PM  
Yay! A Dark matter thread!

My theory that dark matter is empty matter has still yet to be disproven. Therefore, under the rules of Christianity, it still remains valid. Dark matter is matter that has its data set to 0 instead of 1.
 
2018-02-08 11:19:19 PM  
Dark matter is just server lag in the matrix.  Earth is way out from the galactic core so we have crappy ping.
 
2018-02-08 11:44:19 PM  

covfefe: Why is it so unbelievably out there that a shiatload of neutrons could be floating near the galaxy


Free Neutrons decay with a half life around 10 minutes.
 
2018-02-08 11:45:47 PM  

covfefe: Why is it so unbelievably out there that a shiatload of neutrons could be floating near the galaxy


Isolated neutrons are unstable, and there are constraints on the amount of baryonic dark matter which could exist.
 
2018-02-09 12:04:08 AM  
to get dark matter ...just divide by 0.
 
2018-02-09 12:08:26 AM  

Meat's dream: Dark matter is just server lag in the matrix.  Earth is way out from the galactic core so we have crappy ping.


Doesn't help that we're behind seven proxies, either.
 
2018-02-09 02:47:21 AM  

Ivo Shandor: covfefe: Why is it so unbelievably out there that a shiatload of neutrons could be floating near the galaxy

Isolated neutrons are unstable, and there are constraints on the amount of baryonic dark matter which could exist.


Then, in my scientific opinion, dunno.
 
2018-02-09 08:16:08 AM  

DoctorWhat: covfefe: Why is it so unbelievably out there that a shiatload of neutrons could be floating near the galaxy

Free Neutrons decay with a half life around 10 minutes.


Also you can tell from the pixels, and I've seen a few neutrons in my day
 
2018-02-09 08:33:50 AM  

bigdog1960: govervich: Haha. This is too funny. I've just spent a week at a workshop on whether we have already detected the 3.5 keV line (https://www.lorentzcenter.nl/lc/web/2​018/966/info.php3?wsid=966&venue=Snell​ius). I guess this thread is relevant to my interests?

Anyway, the bottom line of a week of discussions is that we should we cautious. We need more data to tell whether the signal is real and whether it's consistent with dark matter or a more conventional explanation (Sulfur 16 charge exchange with hydrogen). If it's real then it's pretty cool and we will be able to confirm it with a number of independent checks. If it's not then that's fine too!

That said, I'm happy to answer any science questions about it.

What does cardboard taste like?


It's a bit bland
 
2018-02-10 01:54:43 AM  
27And on the seventh day, The Lord said, "Fark it, I've been coding for six days straight with no sleep, and I still can't get the gravity engine working right on galactic scales without fudging the numbers. I'll just leave the placeholder numbers for now to make it work and fix it later."

28But The Lord awoke on the eighth day and, being in a hurry to meet his deadline, compiled his code without remembering to fix the gravity engine.

29And thus the world was created using buggy, badly-coded software.

/Book of Nerdius 1:27-29
 
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