Detectability of continuous gravitational waves from planetary-mass companions orbiting compact stars

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Volume 708 (April 2026)

A&A, 708 (2026) A182

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Table 1

S/N values of five exemplary sources computed for individual and combined networks using TianQin, LISA, and Taiji, with T_obs = 4 yr.

Source	TianQin	LISA	Taiji	TianQin+LISA	TianQin+Taiji	LISA+Taiji	TianQin+LISA+Taiji
4U 1543-62 b	${1.48}_{- 0.74}^{+ 2.01}$ $Mathematical equation: $1.48^{+2.01}_{-0.74}$$	${4.99}_{- 2.49}^{+ 6.67}$ $Mathematical equation: $4.99^{+6.67}_{-2.49}$$	${3.93}_{- 1.97}^{+ 5.34}$ $Mathematical equation: $3.93^{+5.34}_{-1.97}$$	${5.20}_{- 2.60}^{+ 7.06}$ $Mathematical equation: $5.20^{+7.06}_{-2.60}$$	${4.20}_{- 2.10}^{+ 5.70}$ $Mathematical equation: $4.20^{+5.70}_{-2.10}$$	${6.35}_{- 3.18}^{+ 8.62}$ $Mathematical equation: $6.35^{+8.62}_{-3.18}$$	${6.52}_{- 3.26}^{+ 8.85}$ $Mathematical equation: $6.52^{+8.85}_{-3.26}$$
CP Eri b	${1.65}_{- 0.83}^{+ 1.22}$ $Mathematical equation: $1.65^{+1.22}_{-0.83}$$	${3.64}_{- 1.83}^{+ 2.69}$ $Mathematical equation: $3.64^{+2.69}_{-1.83}$$	${3.49}_{- 1.76}^{+ 2.58}$ $Mathematical equation: $3.49^{+2.58}_{-1.76}$$	${3.99}_{- 2.01}^{+ 2.95}$ $Mathematical equation: $3.99^{+2.95}_{-2.01}$$	${3.86}_{- 1.94}^{+ 2.85}$ $Mathematical equation: $3.86^{+2.85}_{-1.94}$$	${5.04}_{- 2.54}^{+ 3.73}$ $Mathematical equation: $5.04^{+3.73}_{-2.54}$$	${5.30}_{- 2.67}^{+ 3.92}$ $Mathematical equation: $5.30^{+3.92}_{-2.67}$$
GP Com b	${1.79}_{- 0.97}^{+ 1.26}$ $Mathematical equation: $1.79^{+1.26}_{-0.97}$$	${4.03}_{- 2.19}^{+ 2.83}$ $Mathematical equation: $4.03^{+2.83}_{-2.19}$$	${4.45}_{- 2.42}^{+ 3.13}$ $Mathematical equation: $4.45^{+3.13}_{-2.42}$$	${4.41}_{- 2.39}^{+ 3.10}$ $Mathematical equation: $4.41^{+3.10}_{-2.39}$$	${4.79}_{- 2.61}^{+ 3.37}$ $Mathematical equation: $4.79^{+3.37}_{-2.61}$$	${6.00}_{- 3.26}^{+ 4.22}$ $Mathematical equation: $6.00^{+4.22}_{-3.26}$$	${6.26}_{- 3.40}^{+ 4.41}$ $Mathematical equation: $6.26^{+4.41}_{-3.40}$$
SDSS J0926+3624 b	${1.68}_{- 0.61}^{+ 0.71}$ $Mathematical equation: $1.68^{+0.71}_{-0.61}$$	${3.72}_{- 1.35}^{+ 1.56}$ $Mathematical equation: $3.72^{+1.56}_{-1.35}$$	${3.56}_{- 1.29}^{+ 1.50}$ $Mathematical equation: $3.56^{+1.50}_{-1.29}$$	${4.08}_{- 1.48}^{+ 1.72}$ $Mathematical equation: $4.08^{+1.72}_{-1.48}$$	${3.94}_{- 1.43}^{+ 1.66}$ $Mathematical equation: $3.94^{+1.66}_{-1.43}$$	${5.15}_{- 1.87}^{+ 2.16}$ $Mathematical equation: $5.15^{+2.16}_{-1.87}$$	${5.42}_{- 1.97}^{+ 2.28}$ $Mathematical equation: $5.42^{+2.28}_{-1.97}$$
WZ Sge b	${2.01}_{- 0.30}^{+ 0.32}$ $Mathematical equation: $2.01^{+0.32}_{-0.30}$$	${5.35}_{- 0.81}^{+ 0.86}$ $Mathematical equation: $5.35^{+0.86}_{-0.81}$$	${6.34}_{- 0.96}^{+ 1.02}$ $Mathematical equation: $6.34^{+1.02}_{-0.96}$$	${5.72}_{- 0.87}^{+ 0.92}$ $Mathematical equation: $5.72^{+0.92}_{-0.87}$$	${6.65}_{- 1.01}^{+ 1.07}$ $Mathematical equation: $6.65^{+1.07}_{-1.01}$$	${8.30}_{- 1.26}^{+ 1.34}$ $Mathematical equation: $8.30^{+1.34}_{-1.26}$$	${8.54}_{- 1.29}^{+ 1.38}$ $Mathematical equation: $8.54^{+1.38}_{-1.29}$$

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