The Copernican principle in light of the latest cosmological data

Simple item page
dc.contributor.authorClarkson, D.
dc.contributor.authorCamarena, D.
dc.contributor.authorMarra, V.
dc.contributor.authorSakr, Z.
dc.date.accessioned2022-03-02T13:14:20Z
dc.date.available2022-03-02T13:14:20Z
dc.date.issued2022
dc.description.abstractWe pursue a program to confront observations with inhomogeneous extensions of the FLRW metric. The main idea is to test the Copernican principle (CP) rather than assuming it a priori. We consider the CDM model endowed with a spherical LTB inhomogeneity around us, that is, we assume isotropy and test the hypothesis of homogeneity. We confront the LTB model with the latest available data from cosmic microwave background, BAO, type Ia supernovae, local H0, cosmic chronometers, Compton y-distortion, and kinetic Sunyaev-Zeldovich effect. We find that these data can constrain tightly this extra inhomogeneity, almost to the cosmic variance level: on scales 100 Mpc structures can have a small non-Copernican effective contrast of just δL 0.01. Furtheore, the constraints on the standard CDM parameters are not weakened after marginalizing over the parameters that model the local structure, to which we assign ignorance priors. In other words, dropping the CP assumption does not imply worse constraints on the cosmological parameters. This positive result confis that the present and future data can be meaningfully analyzed within the framework of inhomogeneous cosmology. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.en_US
dc.identifier.citationCamarena, D., Marra, V., Sakr, Z. and Clarkson, C., 2022. The Copernican principle in light of the latest cosmological data. Monthly Notices of the Royal Astronomical Society, 509(1), pp.1291-1302.en_US
dc.identifier.issn00358711
dc.identifier.urihttps://doi.org/10.1093/mnras/stab3077
dc.identifier.urihttp://hdl.handle.net/10566/7300
dc.language.isoenen_US
dc.publisherUniversity of the Western Capeen_US
dc.subjectInhomogeneityen_US
dc.subjectCopernican principleen_US
dc.subjectCosmologyen_US
dc.subjectIsotropyen_US
dc.subjectInhomogeneous cosmologyen_US
dc.titleThe Copernican principle in light of the latest cosmological dataen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Camarena_The coperian principle in light_2021.pdf
Size:
1.35 MB
Format:
Adobe Portable Document Format
Description:
Camarena_The coperian principle in light_2021
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Research Articles (Physics)