Recent content by frazzle

no worries, I've figured it out now.

I was wondering if anyone could help clarify this problem I am having. Upon reading a section in a paper, I am a bit stuck as to how this value of the lower bound of the neutrino mass is reached here. I have highlighted the relevant part in the snapshot...

I was wondering if anybody would be able to explain to me what this means? I can't seem to find out!

apologies if you've already seen this one, but i found this paper on the distribution of baryons to be quite useful Cosmic Matter Distribution: Cosmic Baryon Budget Revisited http://www.arxiv.org/PS_cache/astro-ph/pdf/0312/0312517.pdf

thankyou :)

Aha! Is this to say that the large amount of matter at the centre of the galaxy cluster is was there 'first', and the individual galaxies were attracted to it (and then to each other) which is what caused the cluster to form?

thanks again for your reply! in case you are curious, here is the quote: An important difference between the distribution of dark matter in galaxies and clusters needs to be emphasised: whereas dark matter appears to increase with distance in galaxies, in clusters exactly the reverse is...

Thankyou both for your explanations, they are a big help. I'm still a little confused though. When we talk about the cross-section, we are referring to a cross-sectional area? Is this the cross-section of the incident particle or the target? It makes sense to me that a larger cross-section...

Thankyou so much for your reply Spacetiger, that's really cleared some things up for me. Something that has further confused me however, is that I have read that dark matter is located largely in halos around galaxies, but largely in the centre of galaxy clusters. I don't understand why/how...

Hello everyone, As I've mentioned in a thread in the cosmology forum, I'm currently reseraching dark matter. I am often confronted with 'exclusion plots' for the results of WIMP direct detection (via nuclear recoil) experiments, where one axis depicts WIMP mass, and the other depicts cross...

WIMPs as a DM candidate - Some questions about detection. Hello everyone, I am new here, so sorry if this has already been covered. I ran a search on 'WIMP' for the forum, and it seems I'm in the clear here.. So, I am writing a report on dark matter at the moment, but there are a few things...