Marginal evidence for cosmic acceleration from Type Ia supernovae

TY - JOUR

T1 - Marginal evidence for cosmic acceleration from Type Ia supernovae

AU - Nielsen, Jeppe Trøst

AU - Guffanti, Alberto

AU - Sarkar, Subir

PY - 2016/10/21

Y1 - 2016/10/21

N2 - The â €standard' model of cosmology is founded on the basis that the expansion rate of the universe is accelerating at present-As was inferred originally from the Hubble diagram of Type Ia supernovae. There exists now a much bigger database of supernovae so we can perform rigorous statistical tests to check whether these â €standardisable candles' indeed indicate cosmic acceleration. Taking account of the empirical procedure by which corrections are made to their absolute magnitudes to allow for the varying shape of the light curve and extinction by dust, we find, rather surprisingly, that the data are still quite consistent with a constant rate of expansion.

AB - The â €standard' model of cosmology is founded on the basis that the expansion rate of the universe is accelerating at present-As was inferred originally from the Hubble diagram of Type Ia supernovae. There exists now a much bigger database of supernovae so we can perform rigorous statistical tests to check whether these â €standardisable candles' indeed indicate cosmic acceleration. Taking account of the empirical procedure by which corrections are made to their absolute magnitudes to allow for the varying shape of the light curve and extinction by dust, we find, rather surprisingly, that the data are still quite consistent with a constant rate of expansion.

U2 - 10.1038/srep35596

DO - 10.1038/srep35596

M3 - Journal article

C2 - 27767125

SN - 2045-2322

VL - 6

JO - Scientific Reports

JF - Scientific Reports

M1 - 35596

ER -