X-Shooting ULLYSES: Massive stars at low metallicity - IV. Spectral analysis methods and exemplary results for O stars

Home

All issues

Volume 689 (September 2024)

A&A, 689 (2024) A30

Full HTML

Open Access

Table C.1

Best-fit parameters for the O5 V((f)) star AzV 377 derived with the different methods. Adopted values are in italics.

AzV377	F1	F2	F3	F4	C1	P1
T_eff (kK)	44.0 ± 0.5	${46.00}_{- 1.25}^{+ 1.00}$ $46.00_{ - 1.25}^{ + 1.00}$	${47.25}_{- 0.25}^{+ 2.25}$ $47.25_{ - 0.25}^{ + 2.25}$	${44.7}_{- 1.0}^{+ 3.0}$ $44.7_{ - 1.0}^{ + 3.0}$	44.0 ± 1.5	${44.1}_{- 2}^{+ 2}$ $44.1_{ - 2}^{ + 2}$
log g (cm s⁻²)	3.99 ± 0.05	${4.04}_{- 0.08}^{+ 0.08}$ $4.04_{ - 0.08}^{ + 0.08}$	${4.08}_{- 0.06}^{+ 0.14}$ $4.08_{ - 0.06}^{ + 0.14}$	${4.00}_{- 0.10}^{+ 0.13}$ $4.00_{ - 0.10}^{ + 0.13}$	4.1 ± 0.1	${4.0}_{- 0.1}^{+ 0.1}$ $4.0_{ - 0.1}^{ + 0.1}$
log L (L_⊙)	5.34 ± 0.04	${5.36}_{- 0.04}^{+ 0.03}$ $5.36_{ - 0.04}^{ + 0.03}$	${5.39}_{- 0.03}^{+ 0.06}$ $5.39_{ - 0.03}^{ + 0.06}$	${5.34}_{- 0.08}^{+ 0.14}$ $5.34_{ - 0.08}^{ + 0.14}$	5.30 ± 0.05	5.3 ± 0.1
R_2/3 (R_⊙)	8.1 ± 0.5	${7.62}_{- 0.26}^{+ 0.26}$ $7.62_{ - 0.26}^{ + 0.26}$	${7.46}_{- 0.29}^{+ 0.24}$ $7.46_{ - 0.29}^{ + 0.24}$	${7.8}_{- 0.9}^{+ 0.6}$ $7.8_{ - 0.9}^{ + 0.6}$	8.67 ± 0.80	${7.8}_{- 0.8}^{+ 0.9}$ $7.8_{ - 0.8}^{ + 0.9}$
M_spec (M_⊙)	23 ± 3	$29_{- 3}^{+ 9}$ $29_{ - 3}^{ + 9}$	$24_{- 3}^{+ 8}$ $24_{ - 3}^{ + 8}$	$22_{- 4}^{+ 9}$ $22_{ - 4}^{ + 9}$	34 ± 11	${21.9}_{- 4.5}^{+ 5.7}$ $21.9_{ - 4.5}^{ + 5.7}$
ß₁	≤ 1.5	1.0	${0.5}_{- 0.05}^{+ 0.35}$ $0.5_{ - 0.05}^{ + 0.35}$	1.0	1.0	0.8
ß₂	–	–	–	–	–	–
$\log \dot{M} (M_{⊙} {yr}^{- 1})$ $\log \dot M\left( {{M_ \odot }{\rm{y}}{{\rm{r}}^{ - 1}}} \right)$	≤ −7.38	$- {7.17}_{- 0.33}^{+ 0.20}$ $- 7.17_{ - 0.33}^{ + 0.20}$	$- {8.10}_{- 0.22}^{+ 0.28}$ $- 8.10_{ - 0.22}^{ + 0.28}$	–	–	$- {7.8}_{- 0.1}^{+ 0.1}$ $- 7.8_{ - 0.1}^{ + 0.1}$
$\log \dot{M} (M_{⊙} {yr}^{- 1})$ $\log \dot M\left( {{M_ \odot }{\rm{y}}{{\rm{r}}^{ - 1}}} \right)$	≤ −7.38	$- {6.67}_{- 0.30}^{+ 0.18}$ $- 6.67_{ - 0.30}^{ + 0.18}$	$- {7.49}_{- 0.48}^{+ 0.35}$ $- 7.49_{ - 0.48}^{ + 0.35}$	–	–	$- {7.3}_{- 0.1}^{+ 0.1}$ $- 7.3_{ - 0.1}^{ + 0.1}$
v_∞ (km s⁻¹)	2356 ± 615	3500	$1975_{- 125}^{+ 150}$ $1975_{ - 125}^{ + 150}$	–	–	1800 ± 200
v sin i (km s⁻¹)	74 ± 7	$75_{- 15}^{+ 20}$ $75_{ - 15}^{ + 20}$	75	~ 100	80 ± 10	60 ± 10
v_rad (km s⁻¹)	−187	~ 175	~ 175	~ 195	190 ± 10	178 ± 20
v_mac (km s⁻¹)	60	0	0	20	0	0
ξ (km s⁻¹)	5	15	15	10	10	10
v_windturb (km s⁻¹)	–	350	${39.5}_{- 39.5}^{+ 197.5}$ $39.5_{ - 39.5}^{ + 197.5}$	–	350	180
X_H (mass fr.)	0.59	${0.59}_{- 0.03}^{+ 0.06}$ $0.59_{ - 0.03}^{ + 0.06}$	0.59	0.66	0.69 ± 0.02	${0.74}_{- 0.05}^{+ 0.05}$ $0.74_{ - 0.05}^{ + 0.05}$
X_He (mass fr.)	0.37	${0.40}_{- 0.06}^{+ 0.03}$ $0.40_{ - 0.06}^{ + 0.03}$	0.40	0.34	0.30 ± 0.02	${0.26}_{- 0.05}^{+ 0.05}$ $0.26_{ - 0.05}^{ + 0.05}$
X_C/10⁻⁴ (mass fr.)	4.5	${0.5}_{- 0.3}^{+ 3.1}$ $0.5_{ - 0.3}^{ + 3.1}$	${2.0}_{- 1.2}^{+ 6.8}$ $2.0_{ - 1.2}^{ + 6.8}$	–	8.3 ± 3.5	${1.5}_{- 0.5}^{+ 0.5}$ $1.5_{ - 0.5}^{ + 0.5}$
X_n/10⁻⁴ (mass fr.)	1.3	${7.4}_{- 3.0}^{+ 9.0}$ $7.4_{ - 3.0}^{ + 9.0}$	${10.5}_{- 5.5}^{+ 15.5}$ $10.5_{ - 5.5}^{ + 15.5}$	–	19.4 ± 7.0	${8.0}_{- 1.5}^{+ 1.5}$ $8.0_{ - 1.5}^{ + 1.5}$
X_O/10⁻³ (mass fr.)	1.1	${0.8}_{- 0.7}^{+ 3.4}$ $0.8_{ - 0.7}^{ + 3.4}$	${0.7}_{- 0.5}^{+ 5.2}$ $0.7_{ - 0.5}^{ + 5.2}$	–	0.55 ± 0.2	${0.5}_{- 0.1}^{+ 0.2}$ $0.5_{ - 0.1}^{ + 0.2}$
y_He	0.15 ± 0.02	${0.17}_{- 0.04}^{+ 0.02}$ $0.17_{ - 0.04}^{ + 0.02}$	0.17	~ 0.13	0.11 ± 0.01	0.088
ϵ_C	7.7	${6.80}_{- 0.55}^{+ 0.85}$ $6.80_{ - 0.55}^{ + 0.85}$	${7.45}_{- 0.35}^{+ 0.60}$ $7.45_{ - 0.35}^{ + 0.60}$	–	7.0 ± 0.20	${7.22}_{- 0.17}^{+ 0.15}$ $7.22_{ - 0.17}^{ + 0.15}$
ϵ_N	7.2	${7.95}_{- 0.20}^{+ 0.30}$ $7.95_{ - 0.20}^{ + 0.30}$	${8.10}_{- 0.30}^{+ 0.35}$ $8.10_{ - 0.30}^{ + 0.35}$	–	8.30 ± 0.20	${7.89}_{- 0.10}^{+ 0.07}$ $7.89_{ - 0.10}^{ + 0.07}$
ϵ_O	8.0	${7.9}_{- 1.7}^{+ 0.7}$ $7.9_{ - 1.7}^{ + 0.7}$	${7.85}_{- 0.50}^{+ 0.90}$ $7.85_{ - 0.50}^{ + 0.90}$	–	7.70 ± 0.20	${7.63}_{- 0.11}^{+ 0.14}$ $7.63_{ - 0.11}^{ + 0.14}$
E_b–v (mag)	0.09	0.07	0.07	0.08	0.10 ± 0.02	0.058
log (L_X/L)	–	$- {7.43}_{- 0.18}^{+ 0.10}$ $- 7.43_{ - 0.18}^{ + 0.10}$	$- {8.07}_{- 0.11}^{+ 0.26}$ $- 8.07_{ - 0.11}^{ + 0.26}$	–	–	–
log Q_h (s⁻¹)	–	${49.14}_{- 0.05}^{+ 0.04}$ $49.14_{ - 0.05}^{ + 0.04}$	${49.18}_{- 0.03}^{+ 0.08}$ $49.18_{ - 0.03}^{ + 0.08}$	49.1	49.25	49.08
log Q_{He I} (s⁻¹)	–	${48.53}_{- 0.08}^{+ 0.05}$ $48.53_{ - 0.08}^{ + 0.05}$	${48.58}_{- 0.03}^{+ 0.11}$ $48.58_{ - 0.03}^{ + 0.11}$	48.4	48.75	48.42
log Q_{He II} (s⁻¹)	–	${43.79}_{- 0.29}^{+ 0.17}$ $43.79_{ - 0.29}^{ + 0.17}$	${43.65}_{- 0.25}^{+ 0.36}$ $43.65_{ - 0.25}^{ + 0.36}$	–	44.08	43.38
log Q_ws	≤ −13.8	–	−13.8	< −13.0	–	−13.5
$D_{\infty} or f_{cl} or f_{V}^{- 1}$ ${D_\infty }{\rm{ or }}{f_{{\rm{cl}}}}{\rm{ or }}f_{\rm{V}}^{ - 1}$ ^†	1	10	$16_{- 15}^{+ 17}$ $16_{ - 15}^{ + 17}$	1	1	10
v_cl (km s⁻¹)	–	–	–	–	–	–
v_cl,start (km s⁻¹)	–	–	$158_{- 138}^{+ 356}$ $158_{ - 138}^{ + 356}$	–	–	–
R_D (R₂₀)	–	–	–	–	–	10
log f_ic	–	–	$- {1.20}_{- 0.80}^{+ 0.65}$ $- 1.20_{ - 0.80}^{ + 0.65}$	–	–	–
f_vel	–	–	${0.82}_{- 0.22}^{+ 0.06}$ $0.82_{ - 0.22}^{ + 0.06}$	–	–	–
T₂₀ (kK)	–	–	–	–	44.2	${44.5}_{- 2}^{+ 2}$ $44.5_{ - 2}^{ + 2}$
R₂₀ (R_⊙)	–	–	–	–	8.61	${26.2}_{- 3}^{+ 2}$ $26.2_{ - 3}^{ + 2}$
T₁₀₀ (kK)	–	–	–	–	44.3	–

Notes. ^(†)For optically thin clumping with no inter-clump medium: $D_{\infty} = f_{cl} = f_{V}^{- 1}$ ${D_\infty } = {f_{{\rm{cl}}}} = f_{\rm{V}}^{ - 1}$ (cf. Sect. 3.1.2)

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.