Work

Cosmological Constraints From Sunyaev-zeldovich Cluster Counts: an Approach to Account for Missing Redshifts

Year: 2014

Type: article

Abstract: The accumulation of redshifts provides a significant observational bottleneck when using galaxy cluster surveys to constrain cosmological parameters. We propose a simple method to allow the use of samples where there is a fraction of the redshifts that are not known. The simplest assumption is that the missing redshifts are randomly extracted from the catalog, but the method also allows one to take into account known selection effects in the accumulation of redshifts. We quantify the reduction in statistical precision of cosmological parameter constraints as a function of the fraction of missing redshifts for simulated surveys, and also investigate the impact of making an incorrect assumption for the distribution of missing redshifts.

Source: The Astrophysical Journal

DOI: 10.1088/0004-637x/786/2/88

Authors: A. Bonaldi, R. A. Battye, M. L. Brown

Institution: University of Manchester

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: Science and Technology Facilities Council

Awards: The Radio Universe: astronomy and astrophysics at the Jodrell Bank Centre for Astrophysics 2014-2017, Probing fundamental physics with multi-wavelength cosmology