Recently observed SuperNovas are raising doubts as to their uniformity.
http://arxiv.org/abs/1302.0009
Describes a red-shifted supernova that rises and falls in brightness too fast to be showing time-dilation that’s necessitated by the BB Theory.
http://arxiv.org/abs/1210.3027
Describes a search in a normal Super-Nova remnant which shows a lack of Hydrogen blown off the companion star, this raises the possibility that the Super-Nova resulted from the merger of 2 white dwarfs (which would lack hydrogen), as the two dwarfs could each vary in mass substantially the resulting explosion is not capped at the Chandrasekhar limit but rather TWICE that.
http://prl.aps.org/abstract/PRL/v110/i7/e071102
http://physicsworld.com/cws/article/news/2013/feb/12/extremely-bright-supernovae-may-break-the-chandrasekhar-limit
New modeling of a White Dwarfs indicates that when intense magnetic fields are taken into account (rather then just gravity) the star may grow up to a mass of 2.58 SM before becoming unstable. As Lerner has said repeatedly the failure to consider forces other then gravity inevitably lead to inaccurate models.
Taken together these paper are a full frontal assault on the reliability of Type Ia standard candles and ALL the conclusion drawn from it such as the Hubble constant and most importantly the observed time-dilation of light curves. I’ve concluded that the BB Theory will only be abandoned when and if the time-dilation observation can be definitively overturned, no time-dilation means the Universe is not expanding and is almost certainly eternal. Their is enough doubt and credible research going into Super-Nova modeling that mainstream searches can no longer dismiss these anomalies as ‘not a super-nova’ anymore or claim that the accepted data set is uncontaminated with them and with newer telescopes a large enough statistical sampling should be possible to get a real handle on what the distances and light curves really look like, I suspect we will see a growing “Candle Crisis” in cosmology in the coming decades, it will not take many anomalously bright or long super-novas culled from the data to completely eliminate the time-dilation.
.
.