NUCLEOSYNTHESIS IN A PRIMORDIAL SUPERNOVA: CARBON AND OXYGEN ABUNDANCES IN SMSS J031300.36–670839.3

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Bessell, Michael S.; Collet, Remo; Keller, Stefan C.; Heger, Alexander; Casey, Andrew R.; ... Show more
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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 [O/C] ratio of 0.02 ± 0.175. Our high signal-to-noise ratio UVES data also enabled us to lower the Fe abundance limit to [Fe/H][subscript (3D),NLTE < -7.52 (3σ). These data support our previous suggestion that the star formed from the iron-poor ejecta of a single massive star Population III supernova.
Date issued
2015-06
URI
http://hdl.handle.net/1721.1/98372
Department
Massachusetts Institute of Technology. Department of Physics; MIT Kavli Institute for Astrophysics and Space Research
Journal
The Astrophysical Journal. Letters
Publisher
IOP Publishing
Citation
Bessell, Michael S., Remo Collet, Stefan C. Keller, Anna Frebel, Alexander Heger, Andrew R. Casey, Thomas Masseron, et al. “NUCLEOSYNTHESIS IN A PRIMORDIAL SUPERNOVA: CARBON AND OXYGEN ABUNDANCES IN SMSS J031300.36–670839.3.” The Astrophysical Journal 806, no. 1 (June 8, 2015): L16. © 2015 The American Astronomical Society
Version: Final published version
ISSN
2041-8213
2041-8205
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