Panchromatic characterization of the Y0 brown dwarf WISEP J173835.52+273258.9 using JWST/MIRI

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Volume 703 (November 2025)

A&A, 703 (2025) A70

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Table 3

Summary of previous model fits/retrievals attempting to characterize WISE 1738.

Study	T_eff (K)	log g (cm/s²)	Mass (M_Jup)	Radius (R_Jup)	Age (Gyr)	log K_zz	Distance (pc)	C/O	[M/H]
C11	350–400	4.75–5.0	20	0.86–0.94	–	4	3.4–7.3^d	–	Solar
S15	400	4.0–4.5	5–14^a	0.47^b	0.6–3	–	–	–	Solar
L16b	425 ± 25	4.0 ± 0.25	3–9^a	–	0.15–1	6	7.8 ± 0.6^e	–	0, +0.2
L17	410–440	4.0–4.5	5–14^a	1.0–1.2^a	0.3–3	6	10.5^f	–	−0.05± 0.25
Z19-free	$371_{- 29}^{+ 27}$ $371^{+27}_{-29}$	${5.43}_{- 0.17}^{+ 0.13}$ $5.43^{+0.13}_{-0.17}$	$59_{- 22}^{+ 15}$ $59^{+15}_{-22}$	${0.71}_{- 0.05}^{+ 0.05}$ $0.71^{+0.05}_{-0.05}$	>10	–	7.34 ± 0.22^g	${1.32}_{- 0.09}^{+ 0.1 h}$ $1.32^{+0.1 h}_{-0.09}$	${0.35}_{- 0.09}^{+ 0.10 h}$ $0.35^{+0.10 h}_{-0.09}$
Z19-constr.	$371_{- 30}^{+ 33}$ $371^{+33}_{-30}$	${5.20}_{- 0.29}^{+ 0.20}$ $5.20^{+0.20}_{-0.29}$	$34_{- 17}^{+ 20}$ $34^{+20}_{-17}$	${0.73}_{- 0.03}^{+ 0.04}$ $0.73^{+0.04}_{-0.03}$	>10	–	7.34 ± 0.22^g	${1.2}_{- 0.03}^{+ 0.09 h}$ $1.2^{+0.09 h}_{-0.03}$	${0.23}_{- 0.13}^{+ 0.11 h}$ $0.23^{+0.11 h}_{-0.13}$
This work	$402_{- 9}^{+ 12}$ $402^{+12}_{-9}$	${4.43}_{- 0.34}^{+ 0.26}$ $4.43^{+0.26}_{-0.34}$	$13_{- 7}^{+ 11}$ $13^{+11}_{-7}$	${1.14}_{- 0.03}^{+ 0.03}$ $1.14^{+0.03}_{-0.03}$	1–4^c	–	7.34 ± 0.22^g	${1.35}_{- 0.31}^{+ 0.39}$ $1.35^{+0.39}_{-0.31}$	${0.34}_{- 0.11}^{+ 0.12}$ $0.34^{+0.12}_{-0.11}$

Notes. The studies by Cushing et al. (2011) (C11), Schneider et al. (2015) (S15), and Zalesky et al. (2019) (Z19) utilize data from WFC3 (Cushing et al. 2011) to perform their analysis, whereas Leggett et al. (2016b) (L16b) and Leggett et al. (2017) (L17) rely on data from GNIRS (Leggett et al. 2016a). ^(a)Estimated from the evolutionary model of Saumon & Marley (2008). ^(b)Computed by multiplying the retrieved ratio 6.445 × 10⁻² R_Jup/pc by the distance measure from Martin et al. (2018). ^(c)The age is estimated using the evolutionary model from Marley et al. (2021). ^(d)Distance measure from Cushing et al. (2011). ^(e)Distance measure from Kirkpatrick et al. (2011). ^(f)Distance measure from Beichman et al. (2014). ^(g)Distance measure from Martin et al. (2018). ^(h)Computed from the posteriors of (Zalesky et al. 2019) without sequestration.

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