Carnegie Supernova Project: Classification of Type Ia Supernovae

@article{Burrow2020CarnegieSP,
  title={Carnegie Supernova Project: Classification of Type Ia Supernovae},
  author={Anthony Burrow and Edward A. Baron and Chris Ashall and Christopher R. Burns and Nidia I. Morrell and Maximilian D. Stritzinger and Peter. J. Brown and Gast{\'o}n Folatelli and Wendy L. Freedman and Llu{\'i}s Galbany and Peter Hoeflich and Eric Y. Hsiao and Kevin Krisciunas and Mark M. Phillips and Anthony L. Piro and Nicholas B. Suntzeff and Syed Ashraf Uddin},
  journal={The Astrophysical Journal},
  year={2020},
  volume={901}
}
We use the spectroscopy and homogeneous photometry of 97 Type Ia supernovae (SNe Ia) obtained by the Carnegie Supernova Project as well as a subset of 36 SNe Ia presented by Zheng et al. to examine maximum-light correlations in a four-dimensional (4D) parameter space: B-band absolute magnitude, MB, Si ii λ6355 velocity, , and Si ii pseudo-equivalent widths pEW(Si ii λ6355) and pEW(Si ii λ5972). It is shown using Gaussian mixture models (GMMs) that the original four groups in the Branch diagram… 

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