Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Model Independent Expansion History from Supernovae: Cosmology versus
  Systematics   We examine the Pantheon supernovae distance data compilation in a model
independent analysis to test the validity of cosmic history reconstructions
beyond the concordance $\Lambda$CDM cosmology. Strong deviations are allowed by
the data at $z\gtrsim1$ in the reconstructed Hubble parameter, $Om$ diagnostic,
and dark energy equation of state. We explore three interpretations: 1)
possibility of the true cosmology being far from $\Lambda$CDM, 2) supernovae
property evolution, and 3) survey selection effects. The strong (and
theoretically problematic) deviations at $z\gtrsim1$ vanish and good
consistency with $\Lambda$CDM is found with a simple Malmquist-like linear
correction. The adjusted data is robust against the model independent iterative
smoothing reconstruction. However, we caution that while by eye the original
deviation from $\Lambda$CDM is striking, $\chi^2$ tests do not show the extra
linear correction parameter is statistically significant, and a
model-independent Gaussian Process regression does not find significant
evidence for the need for correction at high-redshifts.

30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex