Empirical mass-loss rates and clumping properties of O-type stars in the Large Magellanic Cloud

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Volume 690 (October 2024)

A&A, 690 (2024) A126

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Table 2

Best-fit wind parameters from GA fitting including optically thick clumping.

ID	SpT	$\log (\frac{L}{L_{⊙}})$ $\log \left( {{L \over {{L_ \odot }}}} \right)$	$\log (\dot{M})$ $\log (\dot M)$	β	ƒ_cl	ƒ_vel	ƒ_ic	v_cl	R_cl
VFTS		(dex)	(M_⊙ yr⁻¹)					(v_∞)	(R_eff)
180	O3If*	5.98 ± 0.07	−5.72 ± 0.05	1.2 ± 0.1	22 ± 0.1	${0.50}_{- 0.05}^{+ 0.11}$ $0.50_{ - 0.05}^{ + 0.11}$	0.12 ± 0.05	0.06 ± 0.01	1.05
608	O4III(f)	5.85 ± 0.08	−6.24 ± 0.05	2.0 ± 0.1	9±1	0.11±0.1	0.16 ± 0.05	0.08 ± 0.01	1.04
096	O6V((n))((fc))z	5.83 ± 0.08	$- {6.50}_{- 0.45}^{+ 0.05}$ $- 6.50_{ - 0.45}^{ + 0.05}$	${2.1}_{- 1.0}^{+ 0.1}$ $2.1_{ - 1.0}^{ + 0.1}$	$19_{- 14}^{+ 11}$ $19_{ - 14}^{ + 11}$	${0.90}_{- 0.50}^{+ 0.02}$ $0.90_{ - 0.50}^{ + 0.02}$	${0.25}_{- 0.20}^{+ 0.05}$ $0.25_{ - 0.20}^{ + 0.05}$	${0.20}_{- 0.05}^{+ 0.01}$ $0.20_{ - 0.05}^{ + 0.01}$	1.11
216	O4V((fc))	5.79 ± 0.09	$- {6.61}_{- 0.16}^{+ 0.07}$ $- 6.61_{ - 0.16}^{ + 0.07}$	${1.8}_{- 03}^{+ 0.1}$ $1.8_{ - 03}^{ + 0.1}$	$26_{- 17}^{+ 0}$ $26_{ - 17}^{ + 0}$	${0.43}_{- 0.18}^{+ 0.56}$ $0.43_{ - 0.18}^{ + 0.56}$	${0.22}_{- 0.16}^{+ 0.07}$ $0.22_{ - 0.16}^{ + 0.07}$	${0.13}_{- 0.06}^{+ 0.01}$ $0.13_{ - 0.06}^{ + 0.01}$	1.08
422	O4III(f)	5.69 ± 0.08	−6 48 ± 0 05	${0.5}_{- 0.5}^{+ 0.1}$ $0.5_{ - 0.5}^{ + 0.1}$	$23_{- 5}^{+ 0}$ $23_{ - 5}^{ + 0}$	0.42 ± 0.05	${0.01}_{- 0.01}^{+ 0.09}$ $0.01_{ - 0.01}^{ + 0.09}$	${0.16}_{- 0.07}^{+ 0.01}$ $0.16_{ - 0.07}^{ + 0.01}$	1.41
440	O6-6.5II(f)	5.64 ± 0.06	−6.23 ± 0.05	1.6 ± 0.1	9 ± 0.1	0.14 ± 0.05	${0.02}_{- 0.01}^{+ 0.05}$ $0.02_{ - 0.01}^{ + 0.05}$	0.04 ± 0.01	1.02
244	O5III(n)(fc)	5.58 ± 0.08	−6.40 ± 0.05	2.0 ± 0.1	$16_{- 0}^{+ 5}$ $16_{ - 0}^{ + 5}$	${0.19}_{- 0.05}^{+ 0.81}$ $0.19_{ - 0.05}^{ + 0.81}$	${0.29}_{- 0.07}^{+ 0.01}$ $0.29_{ - 0.07}^{ + 0.01}$	0.09 ± 0.01	1.04
664	O7II(f)	5.55 ± 0.07	−6.39 ± 0.05	1.8 ± 0.2	$3_{- 0}^{+ 3}$ $3_{ - 0}^{ + 3}$	0.11 ± 0.05	${0.01}_{- 0.00}^{+ 0.05}$ $0.01_{ - 0.00}^{ + 0.05}$	${0.03}_{- 0.01}^{+ 0.02}$ $0.03_{ - 0.01}^{ + 0.02}$	1.02
143	O3.5V((fc))	5.52 ± 0.12	−6.62 ± 0.05	2.0 ± 0.1	3±1	0.74 ± 0.05	${0.29}_{- 0.05}^{+ 0.01}$ $0.29_{ - 0.05}^{ + 0.01}$	0.06 ± 0.01	1.03
586	O4V((n))((fc))z	5.41 ± 0.14	$- {6.90}_{- 0.03}^{+ 0.13}$ $- 6.90_{ - 0.03}^{ + 0.13}$	${1.6}_{- 0.2}^{+ 0.1}$ $1.6_{ - 0.2}^{ + 0.1}$	$18_{- 8}^{+ 5}$ $18_{ - 8}^{ + 5}$	${0.46}_{- 0.32}^{+ 0.05}$ $0.46_{ - 0.32}^{ + 0.05}$	${0.17}_{- 0.10}^{+ 0.11}$ $0.17_{ - 0.10}^{ + 0.11}$	${0.11}_{- 0.03}^{+ 0.03}$ $0.11_{ - 0.03}^{ + 0.03}$	1.08
385	O4-5V	5.34 ± 0.11	−6.29 ± 0.05	0.6 ± 0.1	14±1	0.13 ± 0.05	0.09 ± 0.05	0.03 ± 0.01	1.05
087	O9.7Ib-II	5.23 ± 0.08	$- {6.80}_{- 0.00}^{+ 0.10}$ $- 6.80_{ - 0.00}^{ + 0.10}$	${3.7}_{- 1.2}^{+ 0.1}$ $3.7_{ - 1.2}^{ + 0.1}$	4±1	${0.13}_{- 0.05}^{+ 0.08}$ $0.13_{ - 0.05}^{ + 0.08}$	${0.01}_{- 0.00}^{+ 0.05}$ $0.01_{ - 0.00}^{ + 0.05}$	${0.17}_{- 0.07}^{+ 0.01}$ $0.17_{ - 0.07}^{ + 0.01}$	1.05
184	O6.5Vnz	5.05 ± 0.16	$- {8.29}_{- 0.31}^{+ 0.00}$ $- 8.29_{ - 0.31}^{ + 0.00}$	${1.6}_{- 0.5}^{+ 0.1}$ $1.6_{ - 0.5}^{ + 0.1}$	16±5	${0.42}_{- 0.14}^{+ 0.05}$ $0.42_{ - 0.14}^{ + 0.05}$	${0.21}_{- 0.18}^{+ 0.05}$ $0.21_{ - 0.18}^{ + 0.05}$	${0.03}_{- 0.01}^{+ 0.11}$ $0.03_{ - 0.01}^{ + 0.11}$	1.02
223	O9.5IV	5.00 ± 0.12	$- {7.37}_{- 0.47}^{+ 0.00}$ $- 7.37_{ - 0.47}^{ + 0.00}$	${1.0}_{- 0.1}^{+ 0.8}$ $1.0_{ - 0.1}^{ + 0.8}$	11 ± 4	0.13 ± 0.05	${0.01}_{- 0.00}^{+ 0.05}$ $0.01_{ - 0.00}^{ + 0.05}$	${0.05}_{- 0.01}^{+ 0.04}$ $0.05_{ - 0.01}^{ + 0.04}$	1.05

517	O9.5V-III((n))	4.99 ± 0.10	$- {10.14}_{- 0.00}^{+ 0.44}$ $- 10.14_{ - 0.00}^{ + 0.44}$	${1.2}_{- 0.6}^{+ 0.5}$ $1.2_{ - 0.6}^{ + 0.5}$	${5.6}_{- 3}^{+ 23}$ $5.6_{ - 3}^{ + 23}$	${0.10}_{- 0.05}^{+ 0.33}$ $0.10_{ - 0.05}^{ + 0.33}$	${0.02}_{- 0.00}^{+ 0.21}$ $0.02_{ - 0.00}^{ + 0.21}$	${0.07}_{- 0.02}^{+ 0.06}$ $0.07_{ - 0.02}^{ + 0.06}$	1.06
280	O9V	4.82 ± 0.14	$- {9.32}_{- 0.34}^{+ 0.46}$ $- 9.32_{ - 0.34}^{ + 0.46}$	0.7 ± 0.1	$7_{- 3}^{+ 12}$ $7_{ - 3}^{ + 12}$	${0.14}_{- 0.05}^{+ 0.17}$ $0.14_{ - 0.05}^{ + 0.17}$	${0.01}_{- 0.00}^{+ 0.05}$ $0.01_{ - 0.00}^{ + 0.05}$	${0.18}_{- 0.07}^{+ 0.01}$ $0.18_{ - 0.07}^{ + 0.01}$	1.35
235	O9.7III	4.58 ± 0.18	$- {10.44}_{- 0.06}^{+ 0.44}$ $- 10.44_{ - 0.06}^{ + 0.44}$	${1.2}_{- 0.6}^{+ 0.8}$ $1.2_{ - 0.6}^{ + 0.8}$	$11_{- 7}^{+ 18}$ $11_{ - 7}^{ + 18}$	${0.92}_{- 0.80}^{+ 0.05}$ $0.92_{ - 0.80}^{ + 0.05}$	${0.08}_{- 0.06}^{+ 0.20}$ $0.08_{ - 0.06}^{ + 0.20}$	${0.17}_{- 0.01}^{+ 0.02}$ $0.17_{ - 0.01}^{ + 0.02}$	1.17
627	O9.7V	4.60 ± 0.17	$- {10.38}_{- 0.22}^{+ 0.00}$ $- 10.38_{ - 0.22}^{ + 0.00}$	${1.7}_{- 0.4}^{+ 0.2}$ $1.7_{ - 0.4}^{ + 0.2}$	$28_{- 25}^{+ 0}$ $28_{ - 25}^{ + 0}$	${0.12}_{- 0.05}^{+ 0.79}$ $0.12_{ - 0.05}^{ + 0.79}$	${0.06}_{- 0.05}^{+ 0.23}$ $0.06_{ - 0.05}^{ + 0.23}$	${0.03}_{- 0.02}^{+ 0.15}$ $0.03_{ - 0.02}^{ + 0.15}$	1.02

Notes. Statistical errors from the GA are provided alongside best-fit values. If the errors were underestimated by the GA, we provide lower limits on the uncertainties instead. The stars separated at the bottom are those with no detectable wind features.

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