Impact of cosmic variance on the local measurement of H0

Giovanni Marozzi, Ido Ben-Dayan, Ruth Durrer, Dominik J. Schwarz

Research output: Contribution to journalConference articlepeer-review


Local measurements of the Hubble expansion rate are affected by structures like galaxy clusters or voids. Here we present a fully relativistic treatment of this effect, studying how clustering modifies the dispersion of the mean distance (modulus)-redshift relation in a standard LCDM universe. Our findings is that cosmic variance (i.e. the effects of the local structure) is, for supernova observations at small redshifts (0:01 < z < 0:1), of the same order of magnitude as the current observational errors. The cosmic variance has to be taken into account in local measurements of the Hubble expansion rate and it reduces the tension with the CMB measurement.

Original languageEnglish
Article number087
JournalProceedings of Science
StatePublished - 2014
Externally publishedYes
Event14th Annual International Symposium on Frontiers of Fundamental Physics, FFP 2014 - Marseille, France
Duration: 15 Jul 201418 Jul 2014

All Science Journal Classification (ASJC) codes

  • General


Dive into the research topics of 'Impact of cosmic variance on the local measurement of H0'. Together they form a unique fingerprint.

Cite this