Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Not a Copernican observer: biased peculiar velocity statistics in the
  local Universe   We assess the effect of the local large scale structure on the estimation of
two-point statistics of the observed radial peculiar velocities of galaxies. A
large N-body simulation is used to examine these statistics from the
perspective of random observers as well as "Local Group (LG)-like" observers
conditioned to reside in an environment resembling the observed universe within
20 Mpc. The local environment systematically distorts the shape and amplitude
of velocity statistics with respect to ensemble-averaged measurements made by a
Copernican (random) observer. The Virgo cluster has the most significant
impact, introducing large systematic deviations in all the statistics. For a
simple "top-hat" selection function, an idealized survey extending to $\sim
160h^{-1}\,{\rm Mpc}$ or deeper is needed to completely mitigate the effects of
the local environment. Using shallower catalogues leads to systematic
deviations of the order of $50$ to $200\%$ depending on the scale considered.
For a flat redshift distribution similar to the one of the CosmicFlows-3
survey, the deviations are even more prominent in both the shape and amplitude
at all separations considered $({\stackrel{<}{{}_\sim}} 100h^{-1}\,{\rm Mpc})$.
Conclusions based on statistics calculated without taking into account the
impact of the local environment should be revisited.

31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
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The categories of this paper are: q-alg
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat