A JWST/MIRI view of κ Andromedae b: Refining its mass, age, and physical parameters

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Volume 702 (October 2025)

A&A, 702 (2025) A4

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Table 7

Atmospheric and physical properties of κ And b.

Atmospheric model	T_eff (K)	log(g) (dex)	Radius (R_Jup)	Mass (M_Jup)	log₁₀(L/L_⊙) (dex)	$χ_{red}^{2}$ $\[\chi_{red}^{2}\]$	Data combination*
		with MIRI data

ATMO	$1760_{- 40}^{+ 40}$ $\[1760_{-40}^{+40}\]$	${4.37}_{- 0.06}^{+ 0.06}$ $\[4.37_{-0.06}^{+0.06}\]$	${1.37}_{- 0.04}^{+ 0.05}$ $\[1.37_{-0.04}^{+0.05}\]$	${16.9}_{- 1.6}^{+ 1.7}$ $\[16.9_{-1.6}^{+1.7}\]$	$- {3.76}_{- 0.02}^{+ 0.02}$ $\[-3.76_{-0.02}^{+0.02}\]$	19.57	(IP)
AMES-COND	$1851_{- 47}^{+ 46}$ $\[1851_{-47}^{+46}\]$	${4.36}_{- 0.07}^{+ 0.07}$ $\[4.36_{-0.07}^{+0.07}\]$	${1.33}_{- 0.05}^{+ 0.05}$ $\[1.33_{-0.05}^{+0.05}\]$	${15.5}_{- 1.7}^{+ 1.8}$ $\[15.5_{-1.7}^{+1.8}\]$	$- {3.70}_{- 0.02}^{+ 0.02}$ $\[-3.70_{-0.02}^{+0.02}\]$	53.54	(IP)
BT-COND	$1789_{- 23}^{+ 19}$ $\[1789_{-23}^{+19}\]$	${4.09}_{- 0.07}^{+ 0.06}$ $\[4.09_{-0.07}^{+0.06}\]$	${1.40}_{- 0.03}^{+ 0.03}$ $\[1.40_{-0.03}^{+0.03}\]$	${9.3}_{- 1.1}^{+ 1.0}$ $\[9.3_{-1.1}^{+1.0}\]$	$- {3.72}_{- 0.02}^{+ 0.02}$ $\[-3.72_{-0.02}^{+0.02}\]$	32.26	(IPSP)
EXO-REM (R₅₀₀ – no-cloud)	$1756_{- 36}^{+ 37}$ $\[1756_{-36}^{+37}\]$	${4.33}_{- 0.07}^{+ 0.07}$ $\[4.33_{-0.07}^{+0.07}\]$	${1.44}_{- 0.05}^{+ 0.05}$ $\[1.44_{-0.05}^{+0.05}\]$	${16.9}_{- 1.7}^{+ 1.7}$ $\[16.9_{-1.7}^{+1.7}\]$	$- {3.73}_{- 0.02}^{+ 0.02}$ $\[-3.73_{-0.02}^{+0.02}\]$	27.85	(IP)

BT-DUSTY	$1938_{- 29}^{+ 32}$ $\[1938_{-29}^{+32}\]$	${4.51}_{- 0.05}^{+ 0.05}$ $\[4.51_{-0.05}^{+0.05}\]$	${1.31}_{- 0.05}^{+ 0.04}$ $\[1.31_{-0.05}^{+0.04}\]$	${21.3}_{- 1.4}^{+ 1.4}$ $\[21.3_{-1.4}^{+1.4}\]$	$- {3.64}_{- 0.02}^{+ 0.02}$ $\[-3.64_{-0.02}^{+0.02}\]$	19.38	(IPSP)
AMES-DUSTY	$1694_{- 19}^{+ 17}$ $\[1694_{-19}^{+17}\]$	${4.38}_{- 0.07}^{+ 0.07}$ $\[4.38_{-0.07}^{+0.07}\]$	${1.35}_{- 0.03}^{+ 0.03}$ $\[1.35_{-0.03}^{+0.03}\]$	${16.7}_{- 1.8}^{+ 1.9}$ $\[16.7_{-1.8}^{+1.9}\]$	$- {3.84}_{- 0.02}^{+ 0.02}$ $\[-3.84_{-0.02}^{+0.02}\]$	11.03	(IPSP)
BT-Settl	$1747_{- 27}^{+ 27}$ $\[1747_{-27}^{+27}\]$	${4.29}_{- 0.08}^{+ 0.07}$ $\[4.29_{-0.08}^{+0.07}\]$	${1.44}_{- 0.04}^{+ 0.04}$ $\[1.44_{-0.04}^{+0.04}\]$	${15.4}_{- 2.0}^{+ 2.0}$ $\[15.4_{-2.0}^{+2.0}\]$	$- {3.74}_{- 0.02}^{+ 0.02}$ $\[-3.74_{-0.02}^{+0.02}\]$	14.55	(IPSP)
DRIFT-PHOENIX	$1826_{- 25}^{+ 33}$ $\[1826_{-25}^{+33}\]$	${4.31}_{- 0.07}^{+ 0.06}$ $\[4.31_{-0.07}^{+0.06}\]$	${1.40}_{- 0.04}^{+ 0.06}$ $\[1.40_{-0.04}^{+0.06}\]$	${15.4}_{- 1.8}^{+ 1.7}$ $\[15.4_{-1.8}^{+1.7}\]$	$- {3.69}_{- 0.03}^{+ 0.06}$ $\[-3.69_{-0.03}^{+0.06}\]$	20.41	(IPSP)
EXO-REM (R₂₀₀₀₀)	$1802_{- 23}^{+ 20}$ $\[1802_{-23}^{+20}\]$	${4.32}_{- 0.06}^{+ 0.06}$ $\[4.32_{-0.06}^{+0.06}\]$	${1.47}_{- 0.02}^{+ 0.03}$ $\[1.47_{-0.02}^{+0.03}\]$	${17.5}_{- 1.8}^{+ 1.7}$ $\[17.5_{-1.8}^{+1.7}\]$	$- {3.66}_{- 0.01}^{+ 0.01}$ $\[-3.66_{-0.01}^{+0.01}\]$	10.64	(PSP)
EXO-REM (R₅₀₀)	$1803_{- 24}^{+ 20}$ $\[1803_{-24}^{+20}\]$	${4.33}_{- 0.06}^{+ 0.06}$ $\[4.33_{-0.06}^{+0.06}\]$	${1.47}_{- 0.02}^{+ 0.03}$ $\[1.47_{-0.02}^{+0.03}\]$	${17.6}_{- 1.8}^{+ 1.8}$ $\[17.6_{-1.8}^{+1.8}\]$	$- {3.66}_{- 0.01}^{+ 0.01}$ $\[-3.66_{-0.01}^{+0.01}\]$	8.62	(PSP)

		without MIRI data

ATMO	$1725_{- 36}^{+ 37}$ $\[1725_{-36}^{+37}\]$	${4.34}_{- 0.07}^{+ 0.07}$ $\[4.34_{-0.07}^{+0.07}\]$	${1.40}_{- 0.04}^{+ 0.04}$ $\[1.40_{-0.04}^{+0.04}\]$	${16.4}_{- 1.7}^{+ 1.7}$ $\[16.4_{-1.7}^{+1.7}\]$	$- {3.78}_{- 0.01}^{+ 0.01}$ $\[-3.78_{-0.01}^{+0.01}\]$	13.69	(PSP)
AMES-COND	$1982_{- 76}^{+ 71}$ $\[1982_{-76}^{+71}\]$	${4.42}_{- 0.10}^{+ 0.10}$ $\[4.42_{-0.10}^{+0.10}\]$	${1.18}_{- 0.07}^{+ 0.08}$ $\[1.18_{-0.07}^{+0.08}\]$	${14.2}_{- 2.2}^{+ 2.2}$ $\[14.2_{-2.2}^{+2.2}\]$	$- {3.69}_{- 0.02}^{+ 0.02}$ $\[-3.69_{-0.02}^{+0.02}\]$	43.66	(IPSP)
BT-COND	$1918_{- 23}^{+ 31}$ $\[1918_{-23}^{+31}\]$	${4.27}_{- 0.06}^{+ 0.05}$ $\[4.27_{-0.06}^{+0.05}\]$	${1.24}_{- 0.04}^{+ 0.03}$ $\[1.24_{-0.04}^{+0.03}\]$	${10.8}_{- 1.1}^{+ 0.8}$ $\[10.8_{-1.1}^{+0.8}\]$	$- {3.70}_{- 0.02}^{+ 0.02}$ $\[-3.70_{-0.02}^{+0.02}\]$	27.34	(IPSP)
EXO-REM (R₅₀₀ – no-cloud)	$1709_{- 30}^{+ 39}$ $\[1709_{-30}^{+39}\]$	${4.29}_{- 0.07}^{+ 0.06}$ $\[4.29_{-0.07}^{+0.06}\]$	${1.51}_{- 0.05}^{+ 0.04}$ $\[1.51_{-0.05}^{+0.04}\]$	${17.2}_{- 1.7}^{+ 1.7}$ $\[17.2_{-1.7}^{+1.7}\]$	$- {3.73}_{- 0.01}^{+ 0.01}$ $\[-3.73_{-0.01}^{+0.01}\]$	17.46	(PSP)

BT-DUSTY	$1940_{- 29}^{+ 33}$ $\[1940_{-29}^{+33}\]$	${4.51}_{- 0.05}^{+ 0.05}$ $\[4.51_{-0.05}^{+0.05}\]$	${1.30}_{- 0.05}^{+ 0.05}$ $\[1.30_{-0.05}^{+0.05}\]$	${21.1}_{- 1.5}^{+ 1.4}$ $\[21.1_{-1.5}^{+1.4}\]$	$- {3.64}_{- 0.02}^{+ 0.02}$ $\[-3.64_{-0.02}^{+0.02}\]$	18.95	(IPSP)
AMES-DUSTY	$1805_{- 57}^{+ 72}$ $\[1805_{-57}^{+72}\]$	${4.40}_{- 0.08}^{+ 0.07}$ $\[4.40_{-0.08}^{+0.07}\]$	${1.29}_{- 0.04}^{+ 0.04}$ $\[1.29_{-0.04}^{+0.04}\]$	${15.9}_{- 2.0}^{+ 2.0}$ $\[15.9_{-2.0}^{+2.0}\]$	$- {3.77}_{- 0.04}^{+ 0.05}$ $\[-3.77_{-0.04}^{+0.05}\]$	10.51	(IPSP)
BT-Settl	$1746_{- 27}^{+ 28}$ $\[1746_{-27}^{+28}\]$	${4.29}_{- 0.08}^{+ 0.07}$ $\[4.29_{-0.08}^{+0.07}\]$	${1.44}_{- 0.04}^{+ 0.04}$ $\[1.44_{-0.04}^{+0.04}\]$	${15.4}_{- 2.0}^{+ 1.9}$ $\[15.4_{-2.0}^{+1.9}\]$	$- {3.74}_{- 0.02}^{+ 0.02}$ $\[-3.74_{-0.02}^{+0.02}\]$	14.45	(IPSP)
DRIFT-PHOENIX	$1910_{- 20}^{+ 25}$ $\[1910_{-20}^{+25}\]$	${4.29}_{- 0.08}^{+ 0.10}$ $\[4.29_{-0.08}^{+0.10}\]$	${1.41}_{- 0.13}^{+ 0.12}$ $\[1.41_{-0.13}^{+0.12}\]$	${15.3}_{- 1.9}^{+ 2.0}$ $\[15.3_{-1.9}^{+2.0}\]$	$- {3.59}_{- 0.09}^{+ 0.06}$ $\[-3.59_{-0.09}^{+0.06}\]$	18.75	(IPSP)
EXO-REM (R₂₀₀₀₀)	$1822_{- 41}^{+ 29}$ $\[1822_{-41}^{+29}\]$	${4.35}_{- 0.07}^{+ 0.06}$ $\[4.35_{-0.07}^{+0.06}\]$	${1.42}_{- 0.04}^{+ 0.06}$ $\[1.42_{-0.04}^{+0.06}\]$	${17.2}_{- 1.6}^{+ 1.7}$ $\[17.2_{-1.6}^{+1.7}\]$	$- {3.68}_{- 0.03}^{+ 0.03}$ $\[-3.68_{-0.03}^{+0.03}\]$	15.78	(AD)
EXO-REM (R₅₀₀)	$1803_{- 42}^{+ 43}$ $\[1803_{-42}^{+43}\]$	${4.35}_{- 0.07}^{+ 0.07}$ $\[4.35_{-0.07}^{+0.07}\]$	${1.41}_{- 0.05}^{+ 0.06}$ $\[1.41_{-0.05}^{+0.06}\]$	${17.1}_{- 1.6}^{+ 1.7}$ $\[17.1_{-1.6}^{+1.7}\]$	$- {3.70}_{- 0.02}^{+ 0.02}$ $\[-3.70_{-0.02}^{+0.02}\]$	12.14	(IF)

Cloud-free models	1778 ± 37	4.24 ± 0.14	1.39 ± 0.04	15.0 ± 3.2	−3.73 ± 0.02	−	(WMC)
Cloudy models**	1791 ± 69	4.35 ± 0.07	1.42 ± 0.06	17.3 ± 1.8	−3.71 ± 0.07	−	(WMC)

Notes. Mass refers to spectroscopic mass derived from log(g) and radius. (PSP): Photometry plus synthetic photometry. (IPSP): IFS plus prior using photometry plus synthetic photometry. (IP): IFS plus prior using photometry alone. (IF): IFS no prior. (AD): using the entire dataset. (WMC): Weighted-mean combined values only for the results including MIRI observations. ^(*)Here, data combination refers to the best fits between all the subgroups of datasets (see text for more details). ^(**)We considered these values as our final estimates.

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