Some questions regarding WIMPs as a DM candidate

[SpaceTiger]

Not even to solve the 'cuspy halo problem?

As I said before, there's no standard solution to that problem and the fact that it's getting less severe with time suggests that it may have just been an artifact of imperfect cosmological simulations. We shouldn't ignore it, but that doesn't mean that evidence against self-interacting dark matter is evidence against the standard model, by any stretch of the imagination.

 

[Garth]

Are we back to the OP? Do these constraints rule out WIMPs?

If so what alternatives are left that solve the mass cluster distribution and flat galactic centre distribution?

Garth

 

[SpaceTiger]

Are we back to the OP? Do these constraints rule out WIMPs?

If so what alternatives are left that solve the mass cluster distribution and flat galactic centre distribution?

Why would they rule out WIMPs?

 

[Garth]

Why would they rule out WIMPs?

Your statement:

The standard for CDM simulations is always non-interacting dark matter.

Perhaps I am confused. Does you use of the term 'non-interacting' particles include 'weakly interacting' WIMPS?

Garth

 

[SpaceTiger]

Perhaps I am confused. Does you use of the term 'non-interacting' particles include 'weakly interacting' WIMPS?

"Non-interacting" basically means "interacting so weakly (with both itself and its environment) that the effects are not noticable". Self-interacting dark matter, on the other hand, hypothesizes relatively strong interactions between dark matter particles, but weak interactions with everything else.

 

[Garth]

"Non-interacting" basically means "interacting so weakly (with both itself and its environment) that the effects are not noticable". Self-interacting dark matter, on the other hand, hypothesizes relatively strong interactions between dark matter particles, but weak interactions with everything else.

Thank you for that clarification, so WIMPS are non-interacting then.

Garth

 

[SpaceTiger]

Thank you for that clarification, so WIMPS are non-interacting then.

For cosmological purposes, yes. They still have non-zero cross sections, they're just small enough as to be dynamically negligible.

 

[Chaos' lil bro Order]

Its a pleasure watching Garth talk with ST, this is such a vibrant conversation between two brilliant people. I love this.