Skip to main content Accessibility help
×
Home

Chemical evolution in planet-forming regions. Impact on volatile abundances and C/O ratios of planet-building material

  • Christian Eistrup (a1), Catherine Walsh (a1) (a2) and Ewine F. van Dishoeck (a1) (a3)

Abstract

Connecting the observed composition of exoplanets to their formation sites often involves comparing the atmospheric C/O ratio to a disk midplane model with a fixed chemical composition. In this scenario chemistry during the planet formation era is not considered. However, kinetic chemical evolution during the lifetime of the gaseous disk can change the relative abundances of volatile species, thus altering the C/O ratios of planetary building blocks. In our chemical evolition models we utilize a large network of gas-phase, grain-surface and gas-grain interaction reactions, thus providing a comprehensive treatment of chemistry. The results show that, if sufficient ionisation is present, then chemistry does alter the C/O ratios of gas and ice during the epoch of planet(esimal) formation. This modifies the picture of C/O ratios in disk midplanes defined simply by volatile ice lines in a midplane of fixed chemical composition. Chemical evolution thus needs to be addressed when predicting the makeup of planets and their atmospheres.

Copyright

References

Hide All
Alibert, Y., Carron, F., Fortier, A., et al., 2013, A&A, 558, A109
Ali-Dib, M., Mousis, O., Petit, J.-M., et al., 2014, ApJ, 785, 125
Birkby, J. L., de Kok, R. J., Brogi, M., et al., 2013, MNRAS, 436, L35
Bitsch, B. & Johansen, A., 2016, A&A, 590, A101
Crossfield, I. J. M., 2015, PASP, 127, 941
Eistrup, C., Walsh, C., & van Dishoeck, E. F., 2016, A&A, 595, A83
Fraine, J., Deming, D., Benneke, B., et al., 2014, Nature, 513, 526
Walsh, C., Nomura, H., & van Dishoeck, E., 2015, A&A, 582, A88
Williams, J. P. & Cieza, L. A., 2011, ARA&A, 49, 67
Öberg, K. I., Murray-Clay, R., & Bergin, E. A., 2011, ApJL, 743, L16
Lambrechts, M. & Johansen, A., 2012, A&A, 544, A32
Madhusudhan, N., Amin, M. A., Kennedy, G. M., 2014, ApJL, 794, L12
McElroy, D., Walsh, C., Markwick, A. J., et al., 2013, A&A, 550, A36
Seager, S. & Deming, D., 2010, AR&A, 48, 631
Sing, D. K., Fortney, J. J., Nikolov, N., et al., 2016, Nature, 529, 59
Snellen, I. A. G., de Kok, R. J., de Mooij, , et al., 2010, Nature, 465, 1049
MathJax
MathJax is a JavaScript display engine for mathematics. For more information see http://www.mathjax.org.

Keywords

Chemical evolution in planet-forming regions. Impact on volatile abundances and C/O ratios of planet-building material

  • Christian Eistrup (a1), Catherine Walsh (a1) (a2) and Ewine F. van Dishoeck (a1) (a3)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed