Hydride ion continuum hides absorption signatures in the NIRPS near-infrared transmission spectrum of the ultra-hot gas giant WASP-189b

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Table 1

Planetary and stellar relevant parameters.

	Unit	Value	Reference
Planet parameters
Planet radius, R_p	R_J	1.619 ± 0.021	Lendl et al. (2020)
Planet mass, M_p	M_J	${1.99}_{- 0.14}^{+ 0.16}$ $\[1.99_{-0.14}^{+0.16}\]$	Lendl et al. (2020)
Dayside Eq. temperature, T_eq	K	$3353_{- 34}^{+ 27}$ $\[3353_{-34}^{+27}\]$	Lendl et al. (2020)
Eccentricity, e	−	0 (fixed)	Lendl et al. (2020)
Orbital inclination, i	deg	84.03 ± 0.14	Lendl et al. (2020)
True orb. obliquity, Ψ	deg	85.4 ± 4.3	Lendl et al. (2020)
a/R_⋆	−	${4.600}_{- 0.025}^{+ 0.031}$ $\[4.600_{-0.025}^{+0.031}\]$	Lendl et al. (2020)
Transit duration, T₁₄	h	4.04	This work
Transit midpoint, T_c	days	${2458926.5416960}_{- 0.0000640}^{+ 0.0000650}$ $\[2458926.5416960_{-0.0000640}^{+0.0000650}\]$	Lendl et al. (2020)
Orbital period, P	days	2.7240308 ± 0.0000028	Lendl et al. (2020)
Stellar parameters
Spectral type	−	A4/5/6(m?) IV/V	†
Stellar radius, R_⋆	R_⊙	2.36 ± 0.03	Lendl et al. (2020)
Stellar mass, M_⋆	M_⊙	2.030 ± 0.066	Lendl et al. (2020)
Stellar magnitude, J	−	6.166	Skrutskie et al. (2006)
Proj. rot. velocity, v sin i_⋆	km s⁻¹	93.1 ± 1.7	Lendl et al. (2020)
Reflex vel. semi-amp., K_⋆	m s⁻¹	182 ± 13	Adopted solution by Anderson et al. (2018)

Notes. ^(†)See Sect. 3 about the stellar classification.

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