Consequences of using a smooth cosmic distance in a lumpy Universe. I.

Simple item page
dc.contributor.authorUmeh, Obinna
dc.date.accessioned2022-08-30T12:30:43Z
dc.date.available2022-08-30T12:30:43Z
dc.date.issued2022
dc.description.abstractHow do we appropriately fit a model based on an idealised Friedmann-Lemaˆıtre Robertson-Walker spacetime to observations made from a single location in a lumpy Universe? We address this question for surveys that measure the imprints of the baryon acoustic oscillation in galaxy distribution and the peak apparent magnitude of the Type Ia supernova. These observables are related to the cosmological model through the Alcock-Paczy´nski parameters and the distance-redshift relation. Using the corresponding inhomogeneous spacetime expressions of these as observed data, we perform a parameter inference assuming that the background Friedmann-Lemaˆıtre Robertson-Walker model is the correct model of the Universe. This process allows us to estimate the best fit Hubble rate and the deceleration parameter. We find that the inferred Hubble rate from the monopole of the AlcockPaczy´nski parameters is in tension with the Hubble rate determined using the distance-redshift relation.en_US
dc.identifier.citationUmeh, O. et al. (2022). Consequences of using a smooth cosmic distance in a lumpy Universe. I. Physical Review D, 106(2), 023514. 10.1103/PhysRevD.106.023514en_US
dc.identifier.issn2470-0029
dc.identifier.uri10.1103/PhysRevD.106.023514
dc.identifier.urihttp://hdl.handle.net/10566/7784
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.subjectCosmologyen_US
dc.subjectNongalactic Astrophysicsen_US
dc.subjectAstronomyen_US
dc.subjectAstrophysicsen_US
dc.titleConsequences of using a smooth cosmic distance in a lumpy Universe. I.en_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
umeh_consequences of using smooth distance_2022.pdf
Size:
1.26 MB
Format:
Adobe Portable Document Format
Description:
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)