Dark Matter Cosmic Web Void Filament Imaging Refined

by Tommy on 12/04/2017
Galactic Dark Matter Halo Filaments

Galactic Dark Matter Halo Filaments

Particulate dark matter seems to be confirmed now.

I can only suggest that the gravitational axion detection will happen soon.


The weak-lensing masses of filaments between luminous red galaxies, Seth D. Epps and Michael J. Hudson, Monthly Notices of the Royak Astronomical Society, MNRAS, 468 (3): 2605-2613 (1 Narch 2017), DOI:10.1093/mnras/stx517

In the standard model of non-linear structure formation, a cosmic web of dark-matter-dominated filaments connects dark matter haloes. In this paper, we stack the weak lensing signal of an ensemble of filaments between groups and clusters of galaxies. Specifically, we detect the weak lensing signal, using CFHTLenS galaxy ellipticities, from stacked filaments between Sloan Digital Sky Survey (SDSS)-III/Baryon Oscillation Spectroscopic Survey luminous red galaxies (LRGs). As a control, we compare the physical LRG pairs with projected LRG pairs that are more widely separated in redshift space. We detect the excess filament mass density in the projected pairs at the 5σ level, finding a mass of (1.6 ± 0.3) × 1013 M for a stacked filament region 7.1 h−1 Mpc long and 2.5 h−1 Mpc wide. This filament signal is compared with a model based on the three-point galaxy–galaxy-convergence correlation function, as developed in Clampitt et al., yielding reasonable agreement.

I can comment where this is going though. Although I am not convinced yet either way about sub-horizon (dark energy) inhomogenieties, it’s clear the baryons are migrating into the dark matter filaments (I guess that’s standard terminology now), and the cosmic webs and voids are indeed inhomogenieties looking very much like a nanoscale (or in our case, megascale) phase separation into bosonic remnants of a node-line-sheet structure – which very much looks like domain wall disintegration and dissipation. Therefore the ‘gravitational axion’ paradigm I have proposed at the first of the year still holds. In my opinion, it firmly holds, and quite honestly the hypothesis is the last man standing, irrespective of the actual composite nature or structure of the bosons and/or excitons making up the dark matter. It still could be anything, but clearly this goes well beyond sterile QCD axions in my humble opinion. But alas, I would still take a sterile axion if that turns out to be the case. I’m very flexible with this as long as progress continues to be made. I’m looking for absolute exclusion of low scale SUSY, WIMPS and MACHOs, MOGs entropic gravity, although MACHOs are done and I still believe there is room for entropic gravity.

Somewhere. Over the rainbow. That’s it. I feel another song comin on … You know the story.

Rest in peace, Vera Rubin. 1928-2016.


Comments are closed.