Measuring the Hubble function with standard candle clustering

• Verfasst von: Amendola, Luca [VerfasserIn]
• Verfasst von: Quartin, Miguel [VerfasserIn]
• Titel: Measuring the Hubble function with standard candle clustering
• Verf.angabe: Luca Amendola and Miguel Quartin
• E-Jahr: 2021
• Jahr: 27 March 2021
• Umfang: 6 S.
• Fussnoten: Gesehen am 28.07.2021
• Titel Quelle: Enthalten in: Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society
• Ort Quelle: Oxford : Oxford Univ. Press, 1827
• Jahr Quelle: 2021
• Band/Heft Quelle: 504(2021), 3 vom: Juli, Seite 3884-3889
• ISSN Quelle: 1365-2966
• DOI: doi:10.1093/mnras/stab887
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1764785002

Abstract

Supernova Ia magnitude surveys measure the dimensionless luminosity distance H0DL. However, from the distances alone one cannot obtain quantities like H(z) or the dark energy equation of state, unless further cosmological assumptions are imposed. Here we show that by measuring the power spectrum of density contrast and of peculiar velocities of supernovae one can estimate also H(z)/H0 regardless of background or linearly perturbed cosmology and of galaxy-matter bias. This method, dubbed Clustering of Standard Candles (CSC) also yields the redshift distortion parameter β(k, z) and the biased matter power spectrum in a model-independent way. We forecast that an optimistic (pessimistic) LSST may be able to constrain H(z)/H0 to 5-13 per cent (9-40 per cent) in redshift bins of Δz = 0.1 up to at least z = 0.6.