The massive hot subdwarf binary LAMOST J065816.72+094343.1

Open Access

Table B.1.

Parameters of LAMOST J065816.72+094343.1.

Gaia DR3 astrometry
RA (J2000)	06:58:16.72
Dec (J2000)	+09:43:43.12
G (mag)	13.57
ϖ (mas)	0.79 ± 0.05
RUWE	1.085

Spectroscopic fit

T_eff (K)	35 800 ± 750
log g (dex)	5.37 ± 0.07
log(n_He)	−1.76 ± 0.05
log(n_N)	−4.1 ± 0.1
log(n_Si)	−5.0 ± 0.1
v_rot sin i (km s⁻¹)	37.0 ± 1.0

SED fit

R_sd = Θ/2ϖ (R_⊙)	0.309 ± 0.020
M_sd = gR²/G (M_⊙)	0.82 ± 0.17
L_sd = 4πR²σ_SBT_eff⁴ (L_⊙)	$139_{- 19}^{+ 22}$ $139^{+22}_{-19}$
E(44 − 55)(mag)	0.1233 ± 0.0025

RV fit (median values)

P (d)	0.319 551 93 ± 0.000 000 28
K (km s⁻¹)	186.2 ± 3.3
f (M_⊙)	0.2137 ± 0.011
γ (km s⁻¹)	29.4 ± 2.9
t₀ (BJD_UTC)	2 455 939.1792 ± 0.0038

Light curve fit (median values)

i_LC (deg)	$49_{- 15}^{+ 19}$ $49^{+19}_{-15}$
q = M_comp/M_sd	$1 . 57_{- 0.50}^{+ 0.92}$ $1.57^{+0.92}_{-0.50}$
r_sd = R_sd/a	$0 . 118_{- 0.012}^{+ 0.011}$ $0.118^{+0.011}_{-0.012}$
v_s (km s⁻¹)	$427_{- 57}^{+ 65}$ $427^{+65}_{-57}$

Derived

i_{v_rot} (deg)	$49 . 6_{- 4.1}^{+ 5.2}$ $49.6^{+5.2}_{-4.1}$
M_comp (M_⊙)	$1 . 30_{- 0.26}^{+ 0.31}$ $1.30^{+0.31}_{-0.26}$

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