Bulk Motions of Cosmic Voids

Relevant paper: http://arxiv.org/abs/1510.00712=20

Lambas et al (MNRAS) report some very interesting observations
relating to bulk motions of voids on the order of 300-400 km/sec.=20

Small shell-type voids tend to systematically approach each other,
whereas larger radial density profile types tend the repulse each
other.

According to the authors: "...a non-negligible bulk flow at scales
around a few 100 h^-1 Mpc is a source of tension between real data
and the LambdaCDM model... such fluctuations could be incompatible
with cosmological models derived from Cosmic Microwave Backgroud
probes...".

Personally, the physical behavior looks more like the behavior of
a high-T, high density plasma than the "soap bubbles" analogy floated
by the science media people.

RLO
http://www3.amherst.edu/~rloldershaw

In article ,
"Robert L. Oldershaw" writes:

Relevant paper: http://arxiv.org/abs/1510.00712=20

Lambas et al (MNRAS) report some very interesting observations
relating to bulk motions of voids on the order of 300-400 km/sec.

Small shell-type voids tend to systematically approach each other,
whereas larger radial density profile types tend the repulse each
other.

According to the authors: "...a non-negligible bulk flow at scales
around a few 100 h^-1 Mpc is a source of tension between real data
and the LambdaCDM model... such fluctuations could be incompatible
with cosmological models derived from Cosmic Microwave Backgroud
probes...".

Sorry folks, but the authors should take RLO to court for this gross
misreprentation of their work. I certainly would.

Page 5, first full paragraph, and I quote without gaps starting about
half-way through:

The measurements of a non-negligible bulk flow at scales around a few
100 ^h^{-1} Mpc is source [sic (missing indefinite article)] of
tension between real data and the $\Lambda$CDM model. A large
amplitude of bulk flow (e.g. $400 km s^{-1}$ can be taken as an
indication of the presence of significant density fluctuations at
very large scales (Watkins et al. 2009). The existence of such
fluctuations could be incompatible with cosmological models derived
from Cosmic Microwave Background Probes (Watkins et al. 2009, Lavaux
et al, 2010, Feldman et al. 2010, Colin et al. 2011). Our results
contribute to the field by adding a possible scenario for large scale
flows [large-scale flows] based on the concordance cosmological
model.

Read that last sentence again. Read those last three words again. What
RLO claims is essentially the exact opposite of what the authors claim.

While one might not agree with the authors, it is completely unfair to
grossly misrepresent them in this matter.

Readers should ask themselves how many other "interesting paper on the
arXiv" posts by RLO are guilty of the same crime.