12–17 Sept 2016
Szczecin, Poland
Europe/Warsaw timezone

Analysing a forecast cosmological redshift drift

12 Sept 2016, 14:30
30m
Room 5

Room 5

Szczerbcowa 4, 70-503 Szczecin

Speaker

Iker Leanizbarrutia Alonso (Universiy of the Basque Country EHU/UPV)

Description

We create a model independent mock dataset to test the viability and possible properties of the cosmological redshift drift, also known as Sandage-Loeb test. The redshift of a given object will exhibit a specific variation through time due to the expansion of the universe. This mechanism was predicted by Sandage in 1962, but with the technology of that epoch it was impossible to detected the signal. When new spectroscopic techniques were being used in astrophysics, the concept was revisited by Loeb in 1998.

We also create, in the same model independent way as the SL data, future mock datasets of SN and BAO to compare with SL, and also to see its performance when using all datasets. The behaviour of the datasets are analysed through testing several cosmological models with MCMC. SL dataset presents interesting features, as for example different correlations between parameters comparing to other mock datasets. Besides, the ability of the SL mock dataset to constrain the matter content of the universe $\Omega_m$ is also remarkable, being quite better than the other datasets.

Primary author

Iker Leanizbarrutia Alonso (Universiy of the Basque Country EHU/UPV)

Co-authors

Dr Ruth Lazkoz (University of the Basque Country EHU/UPV) Vincenzo Salzano (University of Szczecin)

Presentation materials