Spectroscopic detection of a 2.9-hour orbit in a long-period radio transient

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Volume 695 (March 2025)

A&A, 695 (2025) L8

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Table 2.

All parameters for the GLEAM-X J0704–37 WD + MD binary system.

Parameter	Value
K_MD (km s⁻¹)	189.4 ± 2.7
ϕ₀	1.3074 ± 0.0021
γ (km s⁻¹)	$- 98 . 9_{- 1.8}^{+ 1.7}$ $-98.9^{+1.7}_{-1.8}$
P_orb (s)	10496 ± 5

E(B − V)	0.119 ± 0.001
T_WD (K)	$7320_{- 590}^{+ 800}$ $7320^{+800}_{-590}$
R_WD (R_⊙)	$0 . 0079_{- 0.0015}^{+ 0.0014}$ $0.0079^{+0.0014}_{-0.0015}$
T_MD (K)	3010 ± 20
R_MD (R_⊙)	$0 . 165_{- 0.004}^{+ 0.003}$ $0.165^{+0.003}_{-0.004}$
d (pc)	380 ± 10

M_WD (M_⊙)	$1 . 02_{- 0.13}^{+ 0.12}$ $1.02^{+0.12}_{-0.13}$
M_MD (M_⊙)	0.136 ± 0.003
a (R_⊙)	1.07 ± 0.04
q	$0 . 133_{- 0.014}^{+ 0.019}$ $0.133^{+0.019}_{-0.014}$
R_MD/R_L	0.680 ± 0.001
i (°)	$28_{- 1}^{+ 2}$ $28^{+2}_{-1}$

Notes. The first level of parameters are just based on the RV shifts of the MD, while the next level is based on a MCMC parameter exploration of the average spectrum. The final level represents parameters derived from those used in the MCMC analysis.

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