Combining Gaia and GRAVITY: Characterising five new directly detected substellar companions

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Volume 688 (August 2024)

A&A, 688 (2024) A44

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Table C.4

Synthetic absolute magnitudes of the different companions.

Target Name	`MKO.J`¹	`MKO.H`¹	`MKO.K`¹	`MKO.Lp`¹	`MKO.Mp`¹	`WISE.W1`²	`WISE.W2`²	`WISE.W3`²	`WISE.W4`²	`GAIA3.G`³	(F_c/F_*)_GAIA3.G
G ...6464 B	−	−	−	−	−	−	−	−	−	−	−
G ...0976 B	−	−	−	−	−	−	−	−	−	−	−
CD-50 869 B	−	−	−	−	−	−	−	−	−	−	−
HD 17155 B	−	−	−	−	−	−	−	−	−	${16.0}_{- 4}^{+ 7}$ $\[16.0_{-4}^{+7}\]$	(0.014 ± 0.008) %
WT 766 B	${11.45}_{- 0.07}^{+ 0.09}$ $\[11.45_{-0.07}^{+0.09}\]$	${10.85}_{- 0.08}^{+ 0.07}$ $\[10.85_{-0.08}^{+0.07}\]$	${10.55}_{- 0.07}^{+ 0.08}$ $\[10.55_{-0.07}^{+0.08}\]$	${9.83}_{- 0.06}^{+ 0.05}$ $\[9.83_{-0.06}^{+0.05}\]$	${10.44}_{- 0.09}^{+ 0.09}$ $\[10.44_{-0.09}^{+0.09}\]$	${10.27}_{- 0.05}^{+ 0.07}$ $\[10.27_{-0.05}^{+0.07}\]$	${10.21}_{- 0.07}^{+ 0.08}$ $\[10.21_{-0.07}^{+0.08}\]$	${9.70}_{- 0.05}^{+ 0.05}$ $\[9.70_{-0.05}^{+0.05}\]$	${9.69}_{- 0.06}^{+ 0.05}$ $\[9.69_{-0.06}^{+0.05}\]$	${16.11}_{- 0.15}^{+ 0.20}$ $\[16.11_{-0.15}^{+0.20}\]$	(1.3 ± 0.2) %
G ...3872 B	${12.88}_{- 0.09}^{+ 0.11}$ $\[12.88_{-0.09}^{+0.11}\]$	${12.23}_{- 0.11}^{+ 0.13}$ $\[12.23_{-0.11}^{+0.13}\]$	${12.24}_{- 0.13}^{+ 0.18}$ $\[12.24_{-0.13}^{+0.18}\]$	${11.14}_{- 0.11}^{+ 0.13}$ $\[11.14_{-0.11}^{+0.13}\]$	${11.55}_{- 0.06}^{+ 0.06}$ $\[11.55_{-0.06}^{+0.06}\]$	${12.05}_{- 0.16}^{+ 0.17}$ $\[12.05_{-0.16}^{+0.17}\]$	${11.29}_{- 0.07}^{+ 0.07}$ $\[11.29_{-0.07}^{+0.07}\]$	${10.49}_{- 0.05}^{+ 0.05}$ $\[10.49_{-0.05}^{+0.05}\]$	${10.38}_{- 0.04}^{+ 0.05}$ $\[10.38_{-0.04}^{+0.05}\]$	−	−
G...1920 B	−	−	−	−	−	−	−	−	−	−	−
StKM1-1494 B	${11.98}_{- 0.09}^{+ 0.09}$ $\[11.98_{-0.09}^{+0.09}\]$	${11.33}_{- 0.08}^{+ 0.08}$ $\[11.33_{-0.08}^{+0.08}\]$	${11.09}_{- 0.10}^{+ 0.10}$ $\[11.09_{-0.10}^{+0.10}\]$	${10.19}_{- 0.08}^{+ 0.08}$ $\[10.19_{-0.08}^{+0.08}\]$	${10.91}_{- 0.07}^{+ 0.08}$ $\[10.91_{-0.07}^{+0.08}\]$	${10.74}_{- 0.10}^{+ 0.11}$ $\[10.74_{-0.10}^{+0.11}\]$	${10.63}_{- 0.07}^{+ 0.08}$ $\[10.63_{-0.07}^{+0.08}\]$	${9.96}_{- 0.04}^{+ 0.05}$ $\[9.96_{-0.04}^{+0.05}\]$	${9.94}_{- 0.04}^{+ 0.04}$ $\[9.94_{-0.04}^{+0.04}\]$	${17.28}_{- 0.18}^{+ 0.20}$ $\[17.28_{-0.18}^{+0.20}\]$	(0.026 ± 0.004) %

References. (1) Tokunaga et al. (2002); (2) Cutri et al. (2021); (3) Gaia Collaboration (2023b).

Notes. The GAIA3.G magnitude was computed via the Baraffe et al. (2015) model, while the ATMO model grid Phillips et al. (2020) was utilised to calculate the other magnitudes. Where the companion mass lies outside of the mass range for which one or the other model is defined, only one model could be used. No magnitudes could be computed for targets lacking age (G ...6464 B, CD-50 869 B and G ...1920 B) or both age and dynamical mass (G ...0976 B). The rightmost column shows the companion-to-host flux ratio in the GAIA3.G band, which is of importance for the zero-companion-Gaia-flux hypothesis.

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