My understanding of that article (and the associated preprint [1]) is that they have not detected oxygen, but are setting up theoretical models and simulations

My understanding of that article (and the associated preprint [1]) is that they have not detected oxygen, but are setting up theoretical models and simulations to account for oxygen that might be detectable in the future. [1] https://arxiv.org/abs/1607.03906 https://arxiv.org/abs/1607.03906