Cosmological constraints from Sunyaev-Zeldovich cluster counts: An approach to account for missing redshifts

Journal Article · Sat May 10 00:00:00 EDT 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/786/2/88· OSTI ID:22356968

Bonaldi, A.; Battye, R. A.

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.

• OSTI ID: 22356968
• Journal Information: Astrophysical Journal, Vol. 786, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCURACY
CATALOGS
COSMOLOGY
DATA ANALYSIS
DISTRIBUTION
GALAXY CLUSTERS
LIMITING VALUES
RANDOMNESS
RED SHIFT
REDUCTION
SIMULATION
UNIVERSE