Abstract
In a fully inhomogeneous, anisotropic cosmological simulation performed by solving Einstein's equations with numerical relativity, we find that a local measurement of the effective Hubble parameter differs by less than 1% compared to the global value. This variance is consistent with predictions from Newtonian gravity. We analyze the averaged local expansion rate on scales comparable to Type 1a supernova surveys, and find that local variance cannot resolve the tension between the Riess et al. and Planck Collaboration et al. measurements.
| Original language | English |
|---|---|
| Article number | L4 |
| Pages (from-to) | 1-6 |
| Number of pages | 6 |
| Journal | Astrophysical Journal Letters |
| Volume | 865 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 20 Sep 2018 |
Keywords
- cosmology: theory
- gravitation
- large-scale structure of universe
Cite this
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The Trouble with Hubble : Local versus Global Expansion Rates in Inhomogeneous Cosmological Simulations with Numerical Relativity. / Macpherson, Hayley J.; Lasky, Paul D.; Price, Daniel J.
In: Astrophysical Journal Letters, Vol. 865, No. 1, L4, 20.09.2018, p. 1-6.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - The Trouble with Hubble
T2 - Local versus Global Expansion Rates in Inhomogeneous Cosmological Simulations with Numerical Relativity
AU - Macpherson, Hayley J.
AU - Lasky, Paul D.
AU - Price, Daniel J.
PY - 2018/9/20
Y1 - 2018/9/20
N2 - In a fully inhomogeneous, anisotropic cosmological simulation performed by solving Einstein's equations with numerical relativity, we find that a local measurement of the effective Hubble parameter differs by less than 1% compared to the global value. This variance is consistent with predictions from Newtonian gravity. We analyze the averaged local expansion rate on scales comparable to Type 1a supernova surveys, and find that local variance cannot resolve the tension between the Riess et al. and Planck Collaboration et al. measurements.
AB - In a fully inhomogeneous, anisotropic cosmological simulation performed by solving Einstein's equations with numerical relativity, we find that a local measurement of the effective Hubble parameter differs by less than 1% compared to the global value. This variance is consistent with predictions from Newtonian gravity. We analyze the averaged local expansion rate on scales comparable to Type 1a supernova surveys, and find that local variance cannot resolve the tension between the Riess et al. and Planck Collaboration et al. measurements.
KW - cosmology: theory
KW - gravitation
KW - large-scale structure of universe
UR - http://www.scopus.com/inward/record.url?scp=85053881195&partnerID=8YFLogxK
U2 - 10.3847/2041-8213/aadf8c
DO - 10.3847/2041-8213/aadf8c
M3 - Article
AN - SCOPUS:85053881195
VL - 865
SP - 1
EP - 6
JO - The Astrophysical Journal Letters
JF - The Astrophysical Journal Letters
SN - 2041-8205
IS - 1
M1 - L4
ER -