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Vanadium oxide and ...
Vanadium oxide and a sharp onset of cold-trapping on a giant exoplanet
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- Pelletier, Stefan (författare)
- University of Montreal,University Of Quebec In Montreal
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- Benneke, Björn (författare)
- University of Montreal,University Of Quebec In Montreal
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- Ali-Dib, Mohamad (författare)
- New York University Abu Dhabi
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- Prinoth, Bibiana (författare)
- Lund University,Lunds universitet,Astrofysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Astrophysics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Kasper, David (författare)
- University of Chicago
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- Seifahrt, Andreas (författare)
- University of Chicago
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- Bean, Jacob L. (författare)
- University of Chicago
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- Debras, Florian (författare)
- University of Toulouse
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- Klein, Baptiste (författare)
- University of Oxford
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- Bazinet, Luc (författare)
- University of Montreal,University Of Quebec In Montreal
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- Hoeijmakers, H. Jens (författare)
- Lund University,Lunds universitet,Astrofysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Astrophysics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Kesseli, Aurora Y. (författare)
- California Institute of Technology
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- Lim, Olivia (författare)
- University of Montreal,University Of Quebec In Montreal
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Carmona, Andres (författare)
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- Pino, Lorenzo (författare)
- INAF - Osservatorio Astrofisico di Arcetri
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- Casasayas-Barris, Núria (författare)
- Leiden University
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- Hood, Thea (författare)
- University of Toulouse
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- Stürmer, Julian (författare)
- Landessternwarte Heidelberg
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(creator_code:org_t)
- 2023
- 2023
- Engelska 4 s.
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Ingår i: Nature. - 0028-0836. ; 619:7970, s. 491-494
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The abundance of refractory elements in giant planets can provide key insights into their formation histories1. Owing to the low temperatures of the Solar System giants, refractory elements condense below the cloud deck, limiting sensing capabilities to only highly volatile elements2. Recently, ultra-hot giant exoplanets have allowed for some refractory elements to be measured, showing abundances broadly consistent with the solar nebula with titanium probably condensed out of the photosphere3,4. Here we report precise abundance constraints of 14 major refractory elements on the ultra-hot giant planet WASP-76b that show distinct deviations from proto-solar and a sharp onset in condensation temperature. In particular, we find nickel to be enriched, a possible sign of the accretion of the core of a differentiated object during the evolution of the planet. Elements with condensation temperatures below 1,550 K otherwise closely match those of the Sun5 before sharply transitioning to being strongly depleted above 1,550 K, which is well explained by nightside cold-trapping. We further unambiguously detect vanadium oxide on WASP-76b, a molecule long suggested to drive atmospheric thermal inversions6, and also observe a global east–west asymmetry7 in its absorption signals. Overall, our findings indicate that giant planets have a mostly stellar-like refractory elemental content and suggest that temperature sequences of hot Jupiter spectra can show abrupt transitions wherein a mineral species is either present or completely absent if a cold trap exists below its condensation temperature8.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
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Pelletier, Stefa ...
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Benneke, Björn
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Ali-Dib, Mohamad
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Prinoth, Bibiana
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Kasper, David
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Seifahrt, Andrea ...
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visa fler...
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Bean, Jacob L.
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Debras, Florian
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Klein, Baptiste
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Bazinet, Luc
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Hoeijmakers, H. ...
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Kesseli, Aurora ...
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Lim, Olivia
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Carmona, Andres
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Pino, Lorenzo
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Casasayas-Barris ...
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Hood, Thea
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Stürmer, Julian
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visa färre...
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