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The 13CO-rich atmos...
The 13CO-rich atmosphere of a young accreting super-Jupiter
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- Zhang, Yapeng (author)
- Leiden University
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- Snellen, Ignas A.G. (author)
- Leiden University
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- Bohn, Alexander J. (author)
- Leiden University
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- Mollière, Paul (author)
- Max Planck Institute for Astronomy
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- Ginski, Christian (author)
- Academic Medical Center of University of Amsterdam (AMC)
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- Hoeijmakers, H. Jens (author)
- Lund University,Lunds universitet,Astronomi - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Lund Observatory - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science,University of Geneva
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- Kenworthy, Matthew A. (author)
- Leiden University
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- Mamajek, Eric E. (author)
- University of Rochester,California Institute of Technology
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Meshkat, Tiffany (author)
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- Reggiani, Maddalena (author)
- Catholic University of Leuven
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- Snik, Frans (author)
- Leiden University
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(creator_code:org_t)
- 2021-07-14
- 2021
- English 3 s.
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In: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 595:7867, s. 370-372
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Abstract
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- Isotope abundance ratios have an important role in astronomy and planetary sciences, providing insights into the origin and evolution of the Solar System, interstellar chemistry and stellar nucleosynthesis1,2. In contrast to deuterium/hydrogen ratios, carbon isotope ratios are found to be roughly constant (around 89) in the Solar System1,3, but do vary on galactic scales with a 12C/13C isotopologue ratio of around 68 in the current local interstellar medium4–6. In molecular clouds and protoplanetary disks, 12CO/13CO ratios can be altered by ice and gas partitioning7, low-temperature isotopic ion-exchange reactions8 and isotope-selective photodissociation9. Here we report observations of 13CO in the atmosphere of the young, accreting super-Jupiter TYC 8998-760-1 b, at a statistical significance of more than six sigma. Marginalizing over the planet’s atmospheric temperature structure, chemical composition and spectral calibration uncertainties suggests a 12CO/13CO ratio of 31−10+17(90% confidence), a substantial enrichment in 13C with respect to the terrestrial standard and the local interstellar value. As the current location of TYC 8998-760-1 b at greater than or equal to 160 astronomical units is far beyond the CO snowline, we postulate that it accreted a substantial fraction of its carbon from ices enriched in 13C through fractionation.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
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Zhang, Yapeng
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Snellen, Ignas A ...
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Bohn, Alexander ...
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Mollière, Paul
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Ginski, Christia ...
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Hoeijmakers, H. ...
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Kenworthy, Matth ...
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Mamajek, Eric E.
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Meshkat, Tiffany
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Reggiani, Maddal ...
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Snik, Frans
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- NATURAL SCIENCES
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Nature
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Lund University