New perspectives on MASCARA-1b: A combined analysis of pre- and post-eclipse emission data using CRIRES+

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Volume 695 (March 2025)

A&A, 695 (2025) A110

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Table 4

Parameters recovered for the combined fits (CO+H₂O+Fe) of MASCARA−1b under the chemical equilibrium (CE) setup.

Parameter (unit)	Prior	Retrieved value (CE)

		Pre-eclipse	Post-eclipse	Pre+Post
α	–	Fixed	Fixed	Fixed
β	𝒰(0.1, 2)	0.76±0.0003	0.82±0.0003	–
K_p (km s⁻¹)	𝒰(185, 215)	194.6±2.90	197.04±2.4	197.8±0.4
Δυ_sys (km s⁻¹)	𝒰(−15, 15)	1.86±2.00	−0.80±1.2	−0.34±0.20
W_conv	𝒰(1, 50)	${1.54}_{- 0.29}^{+ 0.35}$ $1.54_{ - 0.29}^{ + 0.35}$	1.53±0.30	${1.52}_{- 0.24}^{+ 0.22}$ $1.52_{ - 0.24}^{ + 0.22}$
log₁₀(κ_IR) (m² kg⁻¹)	𝒰(−5, 0)	$- {2.40}_{- 0.47}^{+ 0.33}$ $- 2.40_{ - 0.47}^{ + 0.33}$	$- {2.65}_{- 0.66}^{+ 0.55}$ $- 2.65_{ - 0.66}^{ + 0.55}$	$- {2.52}_{- 0.58}^{+ 0.45}$ $- 2.52_{ - 0.58}^{ + 0.45}$
log₁₀(γ)	𝒰(−2, 2)	${0.81}_{- 0.17}^{+ 0.30}$ $0.81_{ - 0.17}^{ + 0.30}$	${1.10}_{- 0.27}^{+ 0.38}$ $1.10_{ - 0.27}^{ + 0.38}$	${0.91}_{- 0.17}^{+ 0.23}$ $0.91_{ - 0.17}^{ + 0.23}$
T_irr (K)	𝒰(1000, 4100)	$2843_{- 456}^{+ 273}$ $2843_{ - 456}^{ + 273}$	$2392_{- 491}^{+ 406}$ $2392_{ - 491}^{ + 406}$	$2693_{- 374}^{+ 281}$ $2693_{ - 374}^{ + 281}$
T_int (K)	–	Fixed	Fixed	Fixed
log₁₀(P_cloud) (bar)	𝒰(−4, 2)	${0.18}_{- 1.29}^{+ 1.21}$ ${0.18_{ - 1.29}^{ + 1.21}}$	${0.25}_{- 1.33}^{+ 1.20}$ ${0.25_{ - 1.33}^{ + 1.20}}$	${0.21}_{- 1.27}^{+ 1.20}$ ${0.21_{ - 1.27}^{ + 1.20}}$
[M/H]	𝒰(−1, 1)	>0.07 (a)	> −0.50	>−0.33
log₁₀(C/O)	𝒰(−1, 1)	$- {0.17}_{- 0.17}^{+ 0.08}$ ${ - 0.17_{ - 0.17}^{ + 0.08}}$	$- {0.13}_{- 0.11}^{+ 0.06}$ ${ - 0.13_{ - 0.11}^{ + 0.06}}$	$- {0.13}_{- 0.09}^{+ 0.06}$ ${ - 0.13_{ - 0.09}^{ + 0.06}}$

Notes. ^(a)Values with a ‘>’ are 1-σ lower limits and those with ‘–’ were not included as free parameters for that particular retrieval.

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