RE: Dark blobs as stealthy dark matter
Thanks for the nice and detailed comment, as usual. Yes I am finally back :)
if neutrinos can shoot through a lightyear of matter ( lead in specific ) and dark matter should (in theory) be more elusive since it hasnt been actually observed yet then a detector the size of the earth would STILL have a near to zero chance on a cosmic scale ?
Neutrinos form a background in such experiments. We however have not excluded the fact that dark matter interaction rates are larger than the neutrino ones. As long a this option is still viable, we have a long way to go.
What i WANTED to ask before i got lost in my head : since dark matter packs in these blobs there should be more mass to observe, and if it interacts with its own kind but not with standard matter AND is subject to gravity it also stands to reason (in my head) that these blobs would act like everything acted in the beginning, they would meld together and become more massive over time
They coalesces by virtue of the dark matter self-interactions. Gravity is still too weak at that scale (we are talking ab out tons and not solar masses).
and
how close am i to the theory ? :p
hm , something odd with the markdown numbering system 1) 2)
No, this means that dark matter may interact more, just because the interaction strength is stronger.
Yes, indeed. Except that with a few tons, you don't bend much so that this would not be noticeable.
okay, so i had question two right, does that mean i pass ? :) cos in most unis you dont pass on 50% , right ?
when i started OU for psychology i think the required score was about 70% or no bach lol
but part 1 leaves me hanging for a moment there
what exactly do you mean by interaction strenght ? i thought gravity pulled depending on mass, so a more massive object will be more subject to it ? thats why the moon revolves and a comet just slings by ?
or is there something else at work ? because right now variable interaction strength sounds to me a lot like variable gravity (ooh dont shoot me hhahah)
no really what i read is (please do correct me) the same amount of mass in a blob of dark matter or a zone of neutrinos will interact differently with the gravitational pull and therefor make a different "dent" in spacetime (thats regardless of volume ofcourse, that far i got already :)
When there is a dark sector, they may come with their own set of interactions that are different from the fundamental ones we know. Those interactions may have different strength. Not electromagnetic, not weak, not strong. Just a different one.
I hope this short answer clarifies.
yes, it actually does , thanks , its an unknown variable