Nucleosynthesis in a Primordial Supernova: Carbon and Oxygen Abundances in Smss J031300.36–670839.3
Year: 2015
Type: article
Abstract: SMSS J031300.36–670839.3 (hereafter SM0313–6708) is a sub-giant halo star, with no detectable Fe lines and large overabundances of C and Mg relative to Ca. We obtained Very Large Telescope–Ultraviolet and Visual Echelle Spectrograph (UVES) spectra extending to 3060 Å showing strong OH A-X band lines enabling an oxygen abundance to be derived. The OH A-X band lines in SM0313–6708 are much stronger than the CH C-X band lines. Spectrum synthesis fits indicate an [ ] ratio of 0.02 ± 0.175. Our high signal-to-noise ratio UVES data also enabled us to lower the Fe abundance limit to (3 σ ). These data support our previous suggestion that the star formed from the iron-poor ejecta of a single massive star Population III supernova.
Institutions: Australian National University, Australian Government, Massachusetts Institute of Technology, University of Minnesota, Shanghai Jiao Tong University, Monash University, University of Cambridge, Uppsala University, Max Planck Institute for Astrophysics, Centre National de la Recherche Scientifique, Institut d'Astrophysique de Paris, Université Pierre-et-Marie-Curie
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2022607292