TY - JOUR
T1 - Finding structure in the dark
T2 - Coupled dark energy, weak lensing, and the mildly nonlinear regime
AU - Miranda, Vinicius
AU - González, Mariana Carrillo
AU - Krause, Elisabeth
AU - Trodden, Mark
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/3/15
Y1 - 2018/3/15
N2 - We reexamine interactions between the dark sectors of cosmology, with a focus on robust constraints that can be obtained using only mildly nonlinear scales. While it is well known that couplings between dark matter and dark energy can be constrained to the percent level when including the full range of scales probed by future optical surveys, calibrating matter power spectrum emulators to all possible choices of potentials and couplings requires many computationally expensive n-body simulations. Here we show that lensing and clustering of galaxies in combination with the cosmic microwave background (CMB) are capable of probing the dark sector coupling to the few percent level for a given class of models, using only linear and quasilinear Fourier modes. These scales can, in principle, be described by semianalytical techniques such as the effective field theory of large-scale structure.
AB - We reexamine interactions between the dark sectors of cosmology, with a focus on robust constraints that can be obtained using only mildly nonlinear scales. While it is well known that couplings between dark matter and dark energy can be constrained to the percent level when including the full range of scales probed by future optical surveys, calibrating matter power spectrum emulators to all possible choices of potentials and couplings requires many computationally expensive n-body simulations. Here we show that lensing and clustering of galaxies in combination with the cosmic microwave background (CMB) are capable of probing the dark sector coupling to the few percent level for a given class of models, using only linear and quasilinear Fourier modes. These scales can, in principle, be described by semianalytical techniques such as the effective field theory of large-scale structure.
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U2 - 10.1103/PhysRevD.97.063511
DO - 10.1103/PhysRevD.97.063511
M3 - Article
AN - SCOPUS:85044833253
SN - 2470-0010
VL - 97
JO - Physical Review D
JF - Physical Review D
IS - 6
M1 - 063511
ER -