Precision measurements of large scale structure with future type Ia supernova surveys

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2008/02/022· OSTI ID:22137798

Hannestad, Steen; Haugbolle, Troels; Thomsen, Bjarne ^[1]

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1. Department of Physics and Astronomy, University of Aarhus, Ny Munkegade, DK-8000 Aarhus C (Denmark)

Type Ia supernovae are currently the best known standard candles at cosmological distances. In addition to providing a powerful probe of dark energy they are an ideal source of information about the peculiar velocity field of the local universe. Even with the very small number of supernovae presently available it has been possible to measure the dipole and quadrupole of the local velocity field out to z{approx}0.025. With future continuous all-sky surveys like the Large Synoptic Survey Telescope (LSST) project the luminosity distances of tens of thousands of nearby supernovae will be measured accurately. This will allow for a determination of the local velocity structure of the universe as a function of redshift with unprecedented accuracy, provided the redshifts of the host galaxies are known. Using catalogues of mock surveys we estimate that future low redshift supernova surveys will be able to probe {sigma}{sub 8} to a precision of roughly 5% at 95% C.L. This is comparable to the precision in future galaxy and weak lensing surveys, and with a relatively modest observational effort it will provide a crucial cross-check on future measurements of the matter power spectrum.

• OSTI ID: 22137798
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 02 Vol. 2008; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ACCURACY
CATALOGS
DISTANCE
GALAXIES
LUMINOSITY
MEASURING METHODS
NONLUMINOUS MATTER
RED SHIFT
SKY
SPECTRA
SUPERNOVAE
TELESCOPES
UNIVERSE
VELOCITY