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- Title
Does ΛCDM really be in tension with the Hubble diagram data?
- Authors
Mehrabi, Ahmad; Basilakos, Spyros
- Abstract
In this article, we elaborate further on the Λ CDM "tension", suggested recently by the authors Lusso et al. (Astron Astrophys 628:L4, 2019) and Risaliti and Lusso (Nat Astron 3(3):272, 2019). We combine Supernovae type Ia (SNIa) with quasars (QSO) and Gamma Ray Bursts (GRB) data in order to reconstruct in a model independent way the Hubble relation to as high redshifts as possible. Specifically, in the case of either SNIa or SNIa/QSO data we find that the current values of the cosmokinetic parameters extracted from the Gaussian process are consistent with those of Λ CDM. Including GRBs in the analysis we find a tension, which lies between 2 σ and 3 σ levels respectively. Finally, we find that at high redshifts ( z > 1 ) the corresponding cosmokinetic parameters significantly deviate from those of Λ CDM, hence the possibility of new Physics is not precluded by the present analysis.
- Subjects
HUBBLE Space Telescope (Spacecraft); TYPE I supernovae; GAMMA ray bursts; GAUSSIAN processes
- Publication
European Physical Journal C -- Particles & Fields, 2020, Vol 80, Issue 7, pN.PAG
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-020-8221-2