Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraining a possible variation of G with Type Ia supernovae   Astrophysical cosmology constrains the variation of Newton's Constant in a
manner complementary to laboratory experiments, such as the celebrated lunar
laser ranging campaign. Supernova cosmology is an example of the former and has
attained campaign status, following planning by a Dark Energy Task Force in
2005. In this paper we employ the full SNIa dataset to the end of 2013 to set a
limit on G variation. In our approach we adopt the standard candle delineation
of the redshift distance relation. We set an upper limit on its rate of change
|G dot / G| of 0.1 parts per billion per year over 9 Gyrs. By contrast lunar
laser ranging tests variation of G over the last few decades. Conversely, one
may adopt the laboratory result as a prior and constrain the effect of variable
G in dark energy equation of state experiments to delta w < 0.02. We also
examine the parameterization G ~ 1 + z. Its short expansion age conflicts with
the measured values of the expansion rate and the density in a flat Universe.
In conclusion, supernova cosmology complements other experiments in limiting G
variation. An important caveat is that it rests on the assumption that the same
mass of 56Ni is burned to create the standard candle regardless of redshift.
These two quantities, f and G, where f is the Chandrasekhar mass fraction
burned, are degenerate. Constraining f variation alone requires more
understanding of the SNIa mechanism.

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The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
3
The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol