SIMBAD references

2020ApJ...898L..31N - Astrophys. J., 898, L31-L31 (2020/August-1)

Detection of Fe I emission in the dayside spectrum of WASP-33b.

NUGROHO S.K., GIBSON N.P., DE MOOIJ E.J.W., HERMAN M.K., WATSON C.A., KAWAHARA H. and MERRITT S.R.

Abstract (from CDS):

We analyze the high-resolution emission spectrum of WASP-33b taken using the High Dispersion Spectrograph (R ≃ 165,000) on the 8.2 m Subaru telescope. The data cover λ ≃ 6170-8817 Å, divided over 30 spectral orders. The telluric and stellar lines are removed using a de-trending algorithm, SYSREM, before cross-correlating with planetary spectral templates. We calculate the templates assuming a 1D plane-parallel hydrostatic atmosphere including continuum opacity of bound-free H and Rayleigh scattering by H2 with a range of constant abundances of Fe I. Using a likelihood-mapping analysis, we detect an Fe I emission signature at 6.4σ located at Kp of 226.0–2.3+2.1 km s–1 and vsys of -3.2–1.8+2.1 km s–1-consistent with the planet's expected velocity in the literature. We also confirm the existence of a thermal inversion in the dayside of the planet, which is very likely to be caused by the presence of Fe I and previously detected TiO in the atmosphere. This makes WASP-33b one of the prime targets to study the relative contributions of both species to the energy budget of an ultra-hot Jupiter.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet atmospheres - Exoplanet atmospheric composition - High resolution spectroscopy

Simbad objects: 7

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2021.01.27-04:51:44

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