BAT99 126: A multiple Wolf-Rayet system in the Large Magellanic Cloud with a massive near-contact binary

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Volume 646 (February 2021)

A&A, 646 (2021) A33

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Table 3.

Stellar parameters derived from a spectroscopic and SED analysis of the four detected components in the spectra of BAT99 126.

Parameter	Component
	A	B	C	D
Spectral type	WN2.5-3	O4 V	O6.5 V	B1 V
M [M_⊙]	17 ± 1	36 ± 5 ^(a)	15 ± 2 ^(a)	–
R [R_⊙]	2.5_−0.6 ^(b)	9.26 ± 1.15	6.31 ± 1.11	–
T_eff [kK]	89₋₁₀ ^(b)	42.5 ± 1.3	37.5 ± 1.3	25.0 ± 2.5
log L/L_⊙ (SED) ^(c)	5.56 ± 0.06	5.37 ± 0.13	4.85 ± 0.13	4.23 ± 0.09
f/f_tot (V) [%]	33 ± 8	40 ± 7 ^(d)	17 ± 3 ^(d)	10 ± 1
v_rot sin i [km s⁻¹]	–	330 ± 40	200 ± 30	40 ± 10

Notes.

^(a)

These were derived from the orbital analysis (Table 2).

^(b)

The errors indicate the lower limit.

^(c)

The errors are formal errors considering the errors on the light ratios. They are probably underestimated (see Sect. 5.4).

^(d)

The errors represent boundaries on the individual contributions, however only solutions for which f_C/f_B = 0.43 ± 0.03 are considered valid.

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