Cosmological data favor Galileon ghost condensate over Λ CDM

Author(s):
Peirone, S. (0000-0002-3510-3208); Benevento, G.; Frusciante, N.; Tsujikawa, S.
Published
2019
Publication type
Article / Letter to editor

Abstract

We place observational constraints on the Galileon ghost condensate model, a dark energy proposal in cubic-order Horndeski theories consistent with the gravitational-wave event GW170817. The model extends the covariant Galileon by taking an additional higher-order field derivative X2 into account. This allows for the dark energy equation of state wDE to access the region −2

Date issued
2019-09-26
Language
English
Is part of
Physical Review D (2019), Vol. 100, no. 6, p. 063540
hdl
1887/82503
doi
10.1103/PhysRevD.100.063540