Is there an Indication of Evolution of Type Ia Supernovae from their Rise Times
作者： Adam G. Riess , Alexei V. Filippenko , Weidong Li , Brian P. Schmidt
DOI: 10.1086/301144
关键词:
摘要: We have compared the rise time for samples of nearby and high-redshift Type Ia supernovae (SNe Ia). The fiducial SNe is 2.5 ± 0.4 days longer than preliminary measurement in 1998 by Goldhaber Groom from Supernova Cosmology Project. If further analysis data does not lead to a significant change value or uncertainty time, then statistical likelihood that two different times remains high (5.8 σ) indicates possible evolution between Ia. consider likely effects several sources systematic error, but none these resolves difference times. Currently, we cannot directly determine impact apparent on previous determinations cosmological parameters.
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