Matches in SemOpenAlex for { <https://semopenalex.org/work/W4210361686> ?p ?o ?g. }
- W4210361686 endingPage "4871" @default.
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- W4210361686 abstract "ABSTRACT We present an optical transmission spectrum for WASP-94A b, the first atmospheric characterization of this highly-inflated hot Jupiter. The planet has a reported radius of $1.72^{+0.06}_{-0.05}$ RJup, a mass of only $0.456^{+0.032}_{-0.036}$ MJup, and an equilibrium temperature of 1508 ± 75 K. We observed the planet transit spectroscopically with the EFOSC2 instrument on the ESO New Technology Telescope (NTT) at La Silla, Chile: the first use of NTT/EFOSC2 for transmission spectroscopy. We achieved an average transit-depth precision of 128 ppm for bin widths of ∼200 Å. This high precision was achieved in part by linking Gaussian Process hyperparameters across all wavelength bins. The resulting transmission spectrum, spanning a wavelength range of 3800–7140 Å, exhibits a sodium absorption with a significance of 4.9σ, suggesting a relatively cloud-free atmosphere. The sodium signal may be broadened, with a best-fitting width of $78_{-32}^{+67}$ Å in contrast to the instrumental resolution of 27.2 ± 0.2 Å. We also detect a steep slope in the blue end of the transmission spectrum, indicating the presence of Rayleigh scattering in the atmosphere of WASP-94A b. Retrieval models show evidence for the observed slope to be super-Rayleigh and potential causes are discussed. Finally, we find narrow absorption cores in the CaII H&K lines of WASP-94A, suggesting the star is enshrouded in gas escaping the hot Jupiter." @default.
- W4210361686 created "2022-02-08" @default.
- W4210361686 creator A5004070487 @default.
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- W4210361686 creator A5034633810 @default.
- W4210361686 creator A5055239116 @default.
- W4210361686 creator A5088018461 @default.
- W4210361686 date "2022-01-06" @default.
- W4210361686 modified "2023-10-14" @default.
- W4210361686 title "LRG-BEASTS: Sodium absorption and Rayleigh scattering in the atmosphere of WASP-94A b using NTT/EFOSC2" @default.
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