Are High Z SNe Brighter than LCMD Predicts?

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High redshift supernovae (SNe) do not consistently appear brighter than the Lambda Cold Dark Matter (LCDM) model predicts. While some rare events may seem exceptionally bright, they do not indicate a systematic trend. Most supernovae align with the expected relationship between redshift and brightness. Anomalies are often attributed to misclassification or chance alignments rather than a deviation from LCDM predictions. Overall, the discussion emphasizes that the majority of observations support the established models.
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I've read one or two articles that are a little dated (2009) and having some trouble finding a thread that discussed the matter briefly. I know that SN US02Wil is bright (for its distance). Is anyone aware of any studies that show that SNe with a high Z appear to be brighter than LCDM predicts?
 
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No.

There are some rare events that look way too bright, but there's no systematic tendency. The vast majority of supernovae fall in line with the expected redshift-brightness relationship, and those few that don't can generally be explained as not actually being SN-1A events, or as due to chance alignments.
 

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