The SPACE Program - I. The featureless spectrum of HD 86226 c challenges sub-Neptune atmosphere trends

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Table 1

Stellar parameters of HD 86226.

Parameter	Value
T_eff (K)	5980 ± 70
log₁₀(g[cm s⁻²])	${4.55}_{- 0.48}^{+ 0.40}$ $\[4.55_{-0.48}^{+0.40}\]$
[Fe/H] (dex)	$- {0.07}_{- 0.14}^{+ 0.15}$ $\[-0.07_{-0.14}^{+0.15}\]$
A_V (mag)	0.06 ± 0.03
R (R_⊙)	1.05 ± 0.02
d (pc)	45.49*

Notes. The stellar parameters were derived using ARIADNE. An exception is the distance (marked with *), which was adapted from the Gaia data release 3 (Gaia Collaboration 2016, 2023).

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