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A PRECISE WATER ABUNDANCE MEASUREMENT FOR THE HOT JUPITER WASP-43b

Open access
Kreidberg, Laura, Bean, Jacob L., Désert, Jean-Michel, Line, Michael R., Fortney, Jonathan J., Madhusudhan, Nikku, Stevenson, Kevin B., Showman, Adam P., Charbonneau, David, McCullough, Peter R., Seager, Sara, Burrows, Adam, Henry, Gregory W., Williamson, Michael, Kataria, Tiffany, Homeier, Derek·2014·The Astrophysical Journal

Abstract

The water abundance in a planetary atmosphere provides a key constraint on the planet's primordial origins because water ice is expected to play an important role in the core accretion model of planet formation. However, the water content of the solar system giant planets is not well known because water is sequestered in clouds deep in their atmospheres. By contrast, short-period exoplanets have such high temperatures that their atmospheres have water in the gas phase, making it possible to measure the water abundance for these objects. We present a precise determination of the water abundance in the atmosphere of the 2 M Jup short-period exoplanet WASP-43b based on thermal emission and transmission spectroscopy measurements obtained with the Hubble Space Telescope . We find the water content is consistent with the value expected in a solar composition gas at planetary temperatures (0.4–3.5 × solar at 1σ confidence). The metallicity of WASP-43b's atmosphere suggested by this result extends the trend observed in the solar system of lower metal enrichment for higher planet masses.

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Metadata

Authors
Kreidberg, L., Bean, J. L., Désert, J.-M., Line, M. R., Fortney, J. J., Madhusudhan, N., Stevenson, K. B., Showman, A. P., Charbonneau, D., McCullough, P. R., Seager, S., Burrows, A., Henry, G. W., Williamson, M., Kataria, T., & Homeier, D.
Venue
The Astrophysical Journal
Published
2014-09-12
Volume
793
Issue
2
Pages
L27
ISSN
  • 2041-8205 (ISSN-L)
  • 2041-8213
OpenAlex
W2100326205
Cited by
401
References
42
FWCI
19.83
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: A PRECISE WATER ABUNDANCE MEASUREMENT FOR THE HOT JUPITER WASP-43b. https://app.cochat.ai/papers/10.1088/2041-8205/793/2/l27
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Kreidberg, L., Bean, J. L., Désert, J.-M., Line, M. R., Fortney, J. J., Madhusudhan, N., Stevenson, K. B., Showman, A. P., Charbonneau, D., McCullough, P. R., Seager, S., Burrows, A., Henry, G. W., Williamson, M., Kataria, T., & Homeier, D. (2014). A PRECISE WATER ABUNDANCE MEASUREMENT FOR THE HOT JUPITER WASP-43b. The Astrophysical Journal. https://doi.org/10.1088/2041-8205/793/2/l27

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.