The spectroscopic binary fraction of the young stellar cluster M17

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Volume 690 (October 2024)

A&A, 690 (2024) A178

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Table 2

Properties of the sample of young clusters plotted in Figures 1 and 5.

Cluster	Age Myr	Distance pc	σ_1D km s⁻¹	σ_1D,RA km s⁻¹	σ_1D,Dec km s⁻¹	⟨υ_RV⟩ km s⁻¹	N stars	Mass M_⊙	P_cuto_ff days	Age ref.	Dist. ref.
IC1805	1.6–3.5	$2019_{- 6}^{+ 6}$ $\[2019_{-6}^{+6}\]$	71.2 ± 20.6	1.44 ± 0.01	2.25 ± 0.01	−53.6 ± 24.0	8	15–60	${1.4}_{- 0.0}^{+ 0.8}$ $\[1.4_{-0.0}^{+0.8}\]$	1	10
IC1848	3.0–5.0	$2058_{- 8}^{+ 8}$ $\[2058_{-8}^{+8}\]$	56.8 ± 30.3	1.25 ± 0.02	1.01 ± 0.02	−42.2 ± 28.1	5	15–60	${1.4}_{- 0.0}^{+ 1.7}$ $\[1.4_{-0.0}^{+1.7}\]$	2	10
IC2944	2.0–3.0	$2138_{- 203}^{+ 210}$ $\[2138_{-203}^{+210}\]$	32.3 ± 10.2	0.40 ± 0.04	0.52 ± 0.04	−0.4 ± 8.6	14	15–60	${6.3}_{- 4.5}^{+ 16.0}$ $\[6.3_{-4.5}^{+16.0}\]$	3	11
NGC6231	4.3–5.1	$1553_{- 2}^{+ 2}$ $\[1553_{-2}^{+2}\]$	72.0 ± 14.6	1.07 ± 0.01	1.14 ± 0.01	−14.2 ± 21.2	13	15–60	${1.4}_{- 0.0}^{+ 0.4}$ $\[1.4_{-0.0}^{+0.4}\]$	4	10
NGC6611	1.1–1.5	$1698_{- 5}^{+ 5}$ $\[1698_{-5}^{+5}\]$	28.5 ± 10.6	1.58 ± 0.01	1.93 ± 0.01	16.8 ± 9.0	9	15–60	${6.8}_{- 5.4}^{+ 29.0}$ $\[6.8_{-5.4}^{+29.0}\]$	5	10
Wd2	1.0–2.0	$4208_{- 80}^{+ 74}$ $\[4208_{-80}^{+74}\]$	12.4 ± 4.2	2.48 ± 0.09	2.13 ± 0.08	8.4 ± 2.2	44	6–60	${203.4}_{- 124.6}^{+ 281.8}$ $\[203.4_{-124.6}^{+281.8}\]$	6	12
M8	1.0–3.0	$1229_{- 3}^{+ 3}$ $\[1229_{-3}^{+3}\]$	32.7 ± 2.6^(*)	2.26 ± 0.01	1.46 ± 0.01	−2.5 ± 2.5 ^(*)	16	6–20	${2.4}_{- 1.0}^{+ 4.9}$ $\[2.4_{-1.0}^{+4.9}\]$	7	10
NGC6357	0.5–3.0	$1672_{- 7}^{+ 7}$ $\[1672_{-7}^{+7}\]$	26.9 ± 1.3 ^(*)	1.07 ± 0.01	1.14 ± 0.01	16.6 ± 1.3 ^(*)	22	6–30	${5.4}_{- 3.3}^{+ 9.6}$ $\[5.4_{-3.3}^{+9.6}\]$	7	10
M17	0.4–0.9	$1675_{- 18}^{+ 19}$ $\[1675_{-18}^{+19}\]$	8.9 ± 0.5	1.47 ± 0.03	2.20 ± 0.02	9.5 ± 0.7	20	3–50	${414.3}_{- 329.0}^{+ 1764.0}$ $\[414.3_{-329.0}^{+1764.0}\]$	9	9
R136	1.0–2.0	49.59 × 10³	31.0 ± 5.8	...	...	270.6 ± 3.5	332	15–60	${11.8}_{- 3.2}^{+ 4.4}$ $\[11.8_{-3.2}^{+4.4}\]$	8	13
Tr 14	1.0–2.0	$2362_{- 54}^{+ 54}$ $\[2362_{-54}^{+54}\]$	14.9 ± 3.5	1.01 ± 0.02	0.85 ± 0.02	4.0 ± 1.0	32	15–50	${188.0}_{- 125.8}^{+ 297.3}$ $\[188.0_{-125.8}^{+297.3}\]$	14, 15	16

Notes. ^(*)σ_1D and ⟨υ_RV⟩ from Ramírez-Tannus et al. (2020), (1) Sung et al. (2017); (2) Lim et al. (2014); (3) Baume et al. (2014); (4) van der Meij et al. (2021); (5) Stoop et al. (2023); (6) Zeidler et al. (2018); (7) Ramírez-Tannus et al. (2020); (8) Hénault-Brunet et al. (2012); (9) Stoop et al. (2024); (10) Hunt & Reffert (2023); (11) Zhang (2023); (12) Cantat-Gaudin et al. (2018); (13) Pietrzyński et al. (2019); (14) Sana et al. (2010); (15) Rochau et al. (2011); (16) Göppl & Preibisch (2022).

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