The atmospheric composition of the ultra-hot Jupiter WASP-178 b observed with ESPRESSO

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Volume 689 (September 2024)

A&A, 689 (2024) A54

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Table 4

Median values of the Gaussian fit parameters and 68% confidence intervals from the probability distribution for the narrow-band detections.

	Amplitude [%]	FWHM [Å]	Centre [Å]	V_FWHM [km s⁻¹]	Centre shift [km s⁻¹]	Detection
NaI D2	$- {0.338}_{- 0.056}^{+ 0.053}$ ${ - 0.338_{ - 0.056}^{ + 0.053}}$	${0.186}_{- 0.036}^{+ 0.044}$ ${0.186_{ - 0.036}^{ + 0.044}}$	${5889.953}_{- 0.012}^{+ 0.013}$ ${5889.953_{ - 0.012}^{ + 0.013}}$	${9.5}_{- 1.8}^{+ 2.2}$ ${9.5_{ - 1.8}^{ + 2.2}}$	${0.14}_{- 0.60}^{+ 0.65}$ ${0.14_{ - 0.60}^{ + 0.65}}$	5.5σ
NaI D1	$- {0.314}_{- 0.055}^{+ 0.049}$ ${ - 0.314_{ - 0.055}^{ + 0.049}}$	${0.160}_{- 0.034}^{+ 0.037}$ ${0.160_{ - 0.034}^{ + 0.037}}$	${5895.966}_{- 0.014}^{+ 0.012}$ ${5895.966_{ - 0.014}^{ + 0.012}}$	${8.1}_{- 1.7}^{+ 1.8}$ ${8.1_{ - 1.7}^{ + 1.8}}$	${2.18}_{- 0.79}^{+ 0.65}$ ${2.18_{ - 0.79}^{ + 0.65}}$	5.4σ
Hα	$- {0.717}_{- 0.039}^{+ 0.038}$ ${ - 0.717_{ - 0.039}^{ + 0.038}}$	${0.866}_{- 0.044}^{+ 0.047}$ ${0.866_{ - 0.044}^{ + 0.047}}$	${6562.724}_{- 0.023}^{+ 0.022}$ ${6562.724_{ - 0.023}^{ + 0.022}}$	${39.6}_{- 2.0}^{+ 2.1}$ ${39.6_{ - 2.0}^{ + 2.1}}$	$- {3.5}_{- 1.0}^{+ 1.0}$ ${ - 3.5_{ - 1.0}^{ + 1.0}}$	13σ
H?	$- {0.462}_{- 0.062}^{+ 0.060}$ ${ - 0.462_{ - 0.062}^{ + 0.060}}$	${0.447}_{- 0.065}^{+ 0.075}$ ${0.447_{ - 0.065}^{ + 0.075}}$	${4861.338}_{- 0.028}^{+ 0.032}$ ${4861.338_{ - 0.028}^{ + 0.032}}$	${27.6}_{- 4.0}^{+ 4.6}$ ${27.6_{ - 4.0}^{ + 4.6}}$	${0.3}_{- 1.7}^{+ 1.9}$ ${0.3_{ - 1.7}^{ + 1.9}}$	7.1σ
MgIb1	$- {0.200}_{- 0.031}^{+ 0.030}$ ${ - 0.200_{ - 0.031}^{ + 0.030}}$	${0.477}_{- 0.081}^{+ 0.092}$ ${0.477_{ - 0.081}^{ + 0.092}}$	${5183.427}_{- 0.038}^{+ 0.034}$ ${5183.427_{ - 0.038}^{ + 0.034}}$	${27.6}_{- 4.7}^{+ 5.3}$ ${27.6_{ - 4.7}^{ + 5.3}}$	$- {10.2}_{- 2.2}^{+ 2.0}$ ${ - 10.2_{ - 2.2}^{ + 2.0}}$	4.6σ
Li I resonant line	…	…	…	…	…	<3 σ
Hγ	…	…	…	…	…	<3 σ

Notes. The amplitude [%], FWHM [Å], and centre [Å] were the fitted parameters, and the remaining values were derived. Li I and Hγ were not detected in the narrow-band transmission spectrum, and we therefore did not fit any profile.

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