Regular Article – Theoretical Physics
Non-parametric reconstruction of the cosmological jerk parameter
Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, 741246, Mohanpur, West Bengal, India
Accepted: 29 December 2020
Published online: 18 January 2021
The cosmological jerk parameter j is reconstructed in a non-parametric way from observational data independent of a fiducial cosmological model. The Cosmic Chronometer data as well as the Supernovae data (the Pantheon compilation) are used for the purpose. The reconstructed values are found to be consistent with the standard CDM model within the confidence level. The model dependent sets like Baryon Acoustic Oscillation and the CMB Shift data are also included thereafter, which does not significantly help in improving or de-proving the confidence level in favour of CDM. The deceleration parameter q is also reconstructed from the same data sets. This is used to find the effective equation of state parameter for the model independent datasets only. CDM model is excluded for some part of the evolution in , but is definitely included in in the domain () of all the reconstructions.
© The Author(s) 2021
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