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 9

Atmospheric and physical properties of κ And b.

Data	T_eff (K)	log(g) (dex)	Radius (R_Jup)	Mass (M_Jup)	log₁₀(L/L_⊙) (dex)	Age* (Myr)
Literature

Carson et al. (2013)	$1680_{- 20}^{+ 30}$ $\[1680_{-20}^{+30}\]$	−	−	${12.8}_{- 1.0}^{+ 2.0}$ $\[12.8_{-1.0}^{+2.0}\]$	−	$30_{- 10}^{+ 20}$ $\[30_{-10}^{+20}\]$
Hinkley et al. (2013)	2040 ± 60	${4.33}_{- 0.79}^{+ 0.88}$ $\[4.33_{-0.79}^{+0.88}\]$	−	$50_{- 13}^{+ 16}$ $\[50_{-13}^{+16}\]$	−	220 ± 100
Bonnefoy et al. (2014)	$1900_{- 200}^{+ 100}$ $\[1900_{-200}^{+100}\]$	4.5 ± 1.0	−	$14_{+ 25}^{- 2}$ $\[14_{+25}^{-2}\]$	−3.76 ± 0.06	$30_{- 10}^{+ 120}$ $\[30_{-10}^{+120}\]$
Jones et al. (2016)	2040 ± 60	−	−	$22_{- 7}^{+ 6}$ $\[22_{-7}^{+6}\]$	−	$47_{- 40}^{+ 27}$ $\[47_{-40}^{+27}\]$
Todorov et al. (2016)	1733 ± 467	−	−	−	−	−
	2050 ± 230	−	−	−	−	−
Currie et al. (2018)	1850 ± 150^a	4.5 ± 0.5	−	$13_{- 2}^{+ 12}$ $\[13_{-2}^{+12}\]$	−3.81 ± 0.06	$40_{- 19}^{+ 34}$ $\[40_{-19}^{+34}\]$
Wilcomb et al. (2020)	2050 ± 100^b	${3.8}_{- 0.3}^{+ 0.7}$ $\[3.8_{-0.3}^{+0.7}\]$	${1.2}_{- 0.2}^{+ 0.3}$ $\[1.2_{-0.2}^{+0.3}\]$	−	$- {3.8}_{+ 0.3}^{- 0.1}$ $\[-3.8_{+0.3}^{-0.1}\]$ ^c	<50
Stone et al. (2020)	1850 ± 50^d	4.75 ± 0.25^e	−	−	−3.735 ± 0.045^f	10–100
Uyama et al. (2020)	1850 ± 50^g	4.25 ± 0.25^h	1.45 ± 0.15ⁱ	−	−	$47_{- 40}^{+ 27}$ $\[47_{-40}^{+27}\]$
	1700	4.00	−	−	−	−
Morris et al. (2024)	1700 ± 100	4.7 ± 0.5	−	−	−	$47_{- 40}^{+ 27}$ $\[47_{-40}^{+27}\]$
Gratton et al. (2024)	1776 ± 61	−	−	15.03 ± 0.66	−	36 ± 8^j
Xuan et al. (2024)	$1680_{- 50}^{+ 60}$ $\[1680_{-50}^{+60}\]$ ^k	−	1.35 ± 0.25^l	22 ± 9^l	−	−

This work

	Cloud-free family
Isochrone+CMD	−	−	−	15.7 ± 2.3	−	50 ± 8
Atmospheric models	1778 ± 37	4.24 ± 0.14	1.39 ± 0.04	15.0 ± 3.2	−3.73 ± 0.02	−
Evol. tracks+AM	−	−	−	16 ± 2	−	52 ± 11

	Cloudy family
Isochrone+CMD	−	−	−	18.1 ± 4.8	−	50 ± 13
Atmospheric models	1791 ± 69	4.35 ± 0.07	1.42 ± 0.06	17.3 ± 1.8	−3.71 ± 0.07	−
Evol. tracks + AM	−	−	−	19 ± 2	−	47 ± 7

Notes. ^(*)Estimated or assumed age. ^(a)The ±150 K does not refer to the uncertainty in the measured effective temperature, but to the range 1950–2150 K. ^(b)The ±100 K does not refer to the uncertainty in the measured effective temperature, but to the range 1950–2150 K. ^(c)The +0.3 and −0.1 refer to the luminosity range of log 10(L/L_⊙)=−3.5 to −3.9. ^(d)The ±50 K does not refer to the uncertainty in the measured effective temperature, but to the range 1800–1900 K. ^(e)The ±25 dex does not refer to the uncertainty in the surface gravity, but to the range 4.5–5.0 dex. ^(f)The ±0.045 uncertainty refers to the range −3.78 to −3.69 in log 10(L/L_⊙) ^(g)The ±50 K does not refer to the uncertainty in the measured effective temperature, but to the range 1800–1900 K. ^(h)The ±0.25 dex does not refer to the uncertainty in the measured surface gravity, but to the range 4.0–4.5 dex. ⁽ⁱ⁾The ±0.15 K does not refer to the uncertainty in the measured radius, but to the range 1.3–1.6 R_Jup. ^(j)Corresponds to the mean and standard deviation values from literature. ^(k)Corresponds to the retrieved effective temperature. ^(l)Values obtained using the bolometric luminosity from Currie et al. (2018), a uniform prior in age (5–100 Myr), and a series of evolutionary models (see Xuan et al. 2024 for further details).

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