The role of oxygen abundances in exoplanet host star C/O ratios

A case study of 55 Cnc

Johanna K. Teske, Katia Cunha, Verne V. Smith, Simon C. Schuler, Caitlin Griffith

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We derive the C/O ratio for the exoplanet host star 55 Cnc based on archive Keck/HIRES spectra. The C/O ratio varies widely depending on which oxygen abundance indicator - the 6300.3 Å [O I] line, the 6363.8 Å [O I] line, or the 7774 Å O I triplet - is used, and we find there is still a large uncertainty even based on individual abundance indicators. This case study demonstrates that caution and care are necessary when determining exoplanet host star C/O ratios, and when considering host star C/O ratios in inferring exoplanet compositions.

Original languageEnglish (US)
Title of host publicationProceedings of the International Astronomical Union
PublisherCambridge University Press
Pages307-308
Number of pages2
Volume8
EditionS299
ISBN (Print)9781107045200
DOIs
StatePublished - 2013

Publication series

NameProceedings of the International Astronomical Union
NumberS299
Volume8
ISSN (Print)17439213
ISSN (Electronic)17439221

Fingerprint

extrasolar planets
stars
oxygen

Keywords

  • Planetary systems: formation
  • Stars: abundances
  • Stars: individual (55 Cnc)

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

Teske, J. K., Cunha, K., Smith, V. V., Schuler, S. C., & Griffith, C. (2013). The role of oxygen abundances in exoplanet host star C/O ratios: A case study of 55 Cnc. In Proceedings of the International Astronomical Union (S299 ed., Vol. 8, pp. 307-308). (Proceedings of the International Astronomical Union; Vol. 8, No. S299). Cambridge University Press. https://doi.org/10.1017/S1743921313008727

The role of oxygen abundances in exoplanet host star C/O ratios : A case study of 55 Cnc. / Teske, Johanna K.; Cunha, Katia; Smith, Verne V.; Schuler, Simon C.; Griffith, Caitlin.

Proceedings of the International Astronomical Union. Vol. 8 S299. ed. Cambridge University Press, 2013. p. 307-308 (Proceedings of the International Astronomical Union; Vol. 8, No. S299).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Teske, JK, Cunha, K, Smith, VV, Schuler, SC & Griffith, C 2013, The role of oxygen abundances in exoplanet host star C/O ratios: A case study of 55 Cnc. in Proceedings of the International Astronomical Union. S299 edn, vol. 8, Proceedings of the International Astronomical Union, no. S299, vol. 8, Cambridge University Press, pp. 307-308. https://doi.org/10.1017/S1743921313008727
Teske JK, Cunha K, Smith VV, Schuler SC, Griffith C. The role of oxygen abundances in exoplanet host star C/O ratios: A case study of 55 Cnc. In Proceedings of the International Astronomical Union. S299 ed. Vol. 8. Cambridge University Press. 2013. p. 307-308. (Proceedings of the International Astronomical Union; S299). https://doi.org/10.1017/S1743921313008727
Teske, Johanna K. ; Cunha, Katia ; Smith, Verne V. ; Schuler, Simon C. ; Griffith, Caitlin. / The role of oxygen abundances in exoplanet host star C/O ratios : A case study of 55 Cnc. Proceedings of the International Astronomical Union. Vol. 8 S299. ed. Cambridge University Press, 2013. pp. 307-308 (Proceedings of the International Astronomical Union; S299).
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