Spectral analysis of two directly imaged benchmark L dwarf companions at the stellar-substellar boundary

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Volume 701 (September 2025)

A&A, 701 (2025) A78

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Table 1

Fitted and derived parameter values from the atmospheric model fits to HD 112863 B, along with the log Z associated with each fit (see Figs. G.1 and G.2).

Parameter	BT-Settl	Sonora Diamondback
T_eff (K)	$1757_{- 36}^{+ 37}$ $\[1757_{-36}^{+37}\]$ , $2002_{- 24}^{+ 23}$ $\[2002_{-24}^{+23}\]$	$1538_{- 75}^{+ 73}$ $\[1538_{-75}^{+73}\]$
log g	${4.973}_{- 0.063}^{+ 0.057}$ $\[4.973_{-0.063}^{+0.057}\]$ , ${5.253}_{- 0.033}^{+ 0.037}$ $\[5.253_{-0.033}^{+0.037}\]$	${4.80}_{- 0.11}^{+ 0.10}$ $\[4.80_{-0.11}^{+0.10}\]$
[M/H]	−	$- {0.16}_{- 0.26}^{+ 0.26}$ $\[-0.16_{-0.26}^{+0.26}\]$
f_sed	−	${1.52}_{- 0.52}^{+ 0.71}$ $\[1.52_{-0.52}^{+0.71}\]$
R^(a) (R_Jup)	${1.428}_{- 0.078}^{+ 0.082}$ $\[1.428_{-0.078}^{+0.082}\]$ , ${1.039}_{- 0.059}^{+ 0.041}$ $\[1.039_{-0.059}^{+0.041}\]$	${1.74}_{- 0.19}^{+ 0.22}$ $\[1.74_{-0.19}^{+0.22}\]$
log L/L_⊙	$- {3.733}_{- 0.027}^{+ 0.023}$ $\[-3.733_{-0.027}^{+0.023}\]$ , $- {3.790}_{- 0.020}^{+ 0.020}$ $\[-3.790_{-0.020}^{+0.020}\]$	$- {3.785}_{- 0.025}^{+ 0.025}$ $\[-3.785_{-0.025}^{+0.025}\]$
log Z	2917.46 ± 0.40	2810.69 ± 0.17

Notes. ^(a)For both model fits, R is a derived parameter that is used to scale the flux of each spectra, along with ϖ.

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