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Table 3

Physical parameters of [W60] B90 from spectroscopy.

Atomic lines in the J-band(a)

Name Model Z (dex) Teff,J (K) log(g) (dex) χ2
EpochJ MARCS LTE 0.250.12+0.25$\[-0.25_{-0.12}^{+0.25}\]$ 3970280+130$\[3970_{-280}^{+130}\]$ 0.200.30+0.20$\[-0.20_{-0.30}^{+0.20}\]$ 63.1
MARCS NLTE +0.000.10+0.20$\[+0.00_{-0.10}^{+0.20}\]$ 3900100+150$\[3900_{-100}^{+150}\]$ +0.500.75+0.00$\[+0.50_{-0.75}^{+0.00}\]$ 36.4

TiO bands from the optical

Spectral type ATLAS o (mag) Teff,TiO (K) E(B − V) (mag) Av (b) (mag) χ2

Epoch1(c) M3 I 3550±40 1.00±0.15 3.41±0.51 13.0
Epoch2 M4 I 12.6±0.1 346030+20$\[3460_{-30}^{+20}\]$ 1.10±0.10 3.75±0.34 193.7
Epoch3 M3 I 12.3±0.1 355030+40$\[3550_{-30}^{+40}\]$ 1.350.05+0.10$\[1.35_{-0.05}^{+0.10}\]$ 4.600.17+0.34$\[4.60_{-0.17}^{+0.34}\]$ 47.9
Epoch4 M3 I 11.8±0.1 361050+60$\[3610_{-50}^{+60}\]$ 1.250.05+0.10$\[1.25_{-0.05}^{+0.10}\]$ 4.260.17+0.34$\[4.26_{-0.17}^{+0.34}\]$ 26.9

Notes. (a) Assuming Z = −0.25 dex and log g = −0.2 dex from the J-band fit.(b)Converted from E(B − V) assuming RV = 3.41. (c) Teff =357050+60 K$\[T_{\text {eff }}=3570_{-50}^{+60} \mathrm{~K}\]$ and E(B − V) = 1.00 ± 0.14 mag from de Wit et al. (2023).

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