Binary properties of the globular cluster 47 Tuc (NGC 104) - A dearth of short-period binaries

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Volume 693 (January 2025)

A&A, 693 (2025) A161

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Table A.1

Properties of the 30 identified binary systems with well-constrained orbits.

ID	RA	Decl	F606W	m₁	min. m₂	P	K	e	Comment
	[deg]	[deg]	[mag]	[M_⊙]	[M_⊙]	[d]	[km/s]
1358	5.9975	−72.1090	16.92	0.78	0.47	66.25 ±0.03	${21.4}_{- 0.8}^{+ 0.9}$ $21.4_{ - 0.8}^{ + 0.9}$	0.13 ±0.05
22875	6.0072	−72.1080	18.16	0.73	0.39	5.17 ±0.01	${44.7}_{- 3.3}^{+ 3.5}$ $44.7_{ - 3.3}^{ + 3.5}$	${0.04}_{- 0.03}^{+ 0.06}$ $0.04_{ - 0.03}^{ + 0.06}$
26528	5.9889	−72.0966	17.94	0.75	0.16	${54.52}_{- 8.26}^{+ 16.08}$ $54.52_{ - 8.26}^{ + 16.08}$	${9.6}_{- 1.4}^{+ 2.0}$ $9.6_{ - 1.4}^{ + 2.0}$	${0.14}_{- 0.10}^{+ 0.21}$ $0.14_{ - 0.10}^{ + 0.21}$
29053	5.9744	−72.1069	18.46	0.72	0.11	17.44 ±0.01	${10.3}_{- 1.3}^{+ 1.7}$ $10.3_{ - 1.3}^{ + 1.7}$	${0.11}_{- 0.09}^{+ 0.16}$ $0.11_{ - 0.09}^{ + 0.16}$
29629	5.9718	−72.0959	17.10	0.78	0.17	7.25 ±0.01	${19.2}_{- 1.5}^{+ 1.6}$ $19.2_{ - 1.5}^{ + 1.6}$	${0.08}_{- 0.06}^{+ 0.07}$ $0.08_{ - 0.06}^{ + 0.07}$
30718	5.9659	−72.0993	18.20	0.73	0.32	41.40 ±0.02	${20.6}_{- 1.4}^{+ 1.9}$ $20.6_{ - 1.4}^{ + 1.9}$	0.37 ±0.08
51235	6.0438	−72.0850	15.70	0.80	0.36	${190.62}_{- 3.83}^{+ 97.38}$ $190.62_{ - 3.83}^{ + 97.38}$	${13.2}_{- 1.9}^{+ 2.0}$ $13.2_{ - 1.9}^{ + 2.0}$	${0.25}_{- 0.17}^{+ 0.19}$ $0.25_{ - 0.17}^{ + 0.19}$
53591	6.0357	−72.0931	16.97	0.78	0.47	4.90 ±0.01	50.8 ±3.2	${0.03}_{- 0.03}^{+ 0.05}$ $0.03_{ - 0.03}^{ + 0.05}$	WF4-V04, ELO, X-ray
55706	6.0294	−72.0852	16.35	1.2	0.52	${35.69}_{- 0.06}^{+ 0.02}$ $35.69_{ - 0.06}^{ + 0.02}$	25.3 ±3.0	${0.42}_{- 0.2}^{+ 0.09}$ $0.42_{ - 0.2}^{ + 0.09}$	BSS
57067	6.0268	−72.0813	16.31	1.2	0.49	2.70 ±0.01	${55.3}_{- 4.2}^{+ 5.2}$ $55.3_{ - 4.2}^{ + 5.2}$	${0.28}_{- 0.07}^{+ 0.09}$ $0.28_{ - 0.07}^{ + 0.09}$	BSS, ELO
61863	6.0127	−72.0840	14.21	0.82	0.15	${75.20}_{- 0.49}^{+ 74.78}$ ${75.20_{ - 0.49}^{ + 74.78}}$	${11.4}_{- 3.7}^{+ 3.4}$ ${11.4_{ - 3.7}^{ + 3.4}}$	${0.69}_{- 0.15}^{+ 0.11}$ ${0.69_{ - 0.15}^{ + 0.11}}$	bimodal
61968	6.0114	−72.0937	17.74	0.75	0.38	6.27 ±0.01	40.0 ±2.7	${0.03}_{- 0.03}^{+ 0.05}$ ${0.03_{ - 0.03}^{ + 0.05}}$
63549	6.0069	−72.0905	16.65	1.2	0.3	${15.93}_{- 0.02}^{+ 0.67}$ ${15.93_{ - 0.02}^{ + 0.67}}$	${19.8}_{- 2.6}^{+ 3.1}$ ${19.8_{ - 2.6}^{ + 3.1}}$	${0.11}_{- 0.09}^{+ 0.21}$ ${0.11_{ - 0.09}^{ + 0.21}}$	BSS
65419	6.0021	−72.0868	16.94	0.77	0.72	$262_{- 208.}^{+ 2}$ ${262_{ - 208.}^{ + 2}}$	${19.2}_{- 2.4}^{+ 2.5}$ ${19.2_{ - 2.4}^{ + 2.5}}$	${0.16}_{- 0.14}^{+ 0.22}$ ${0.16_{ - 0.14}^{ + 0.22}}$	white dwarf cand., bimodal
68514	5.9910	−72.0814	16.96	0.78	0.35	4.16 ±0.01	${43.1}_{- 3.7}^{+ 4.6}$ ${43.1_{ - 3.7}^{ + 4.6}}$	${0.15}_{- 0.08}^{+ 0.09}$ ${0.15_{ - 0.08}^{ + 0.09}}$
70896	5.9811	−72.0835	13.53	0.82	0.35	${127.36}_{- 0.3}^{+ 0.34}$ $127.36_{ - 0.3}^{ + 0.34}$	${14.1}_{- 0.7}^{+ 1.0}$ $14.1_{ - 0.7}^{ + 1.0}$	0.34 ±0.06
98813	6.0306	−72.0804	15.49	0.81	0.10	33.61 ±0.03	7.9 ±0.9	${0.12}_{- 0.09}^{+ 0.15}$ $0.12_{ - 0.09}^{ + 0.15}$	bimodal
104622	6.0138	−72.0798	16.34	1.2	0.42	22.66 ±0.01	23.4 ±2.5	${0.07}_{- 0.06}^{+ 0.1}$ $0.07_{ - 0.06}^{ + 0.1}$	BSS, bimodal
106521	6.0083	−72.0780	13.96	0.83	0.20	${141.33}_{- 0.34}^{+ 0.27}$ ${141.33_{ - 0.34}^{ + 0.27}}$	${8.1}_{- 1.3}^{+ 1.2}$ ${8.1_{ - 1.3}^{ + 1.2}}$	${0.07}_{- 0.05}^{+ 0.13}$ ${0.07_{ - 0.05}^{ + 0.13}}$
106958	6.0070	−72.0736	16.73	1.2	0.44	${133.63}_{- 0.98}^{+ 209.79}$ ${133.63_{ - 0.98}^{ + 209.79}}$	${15.7}_{- 2.9}^{+ 3.2}$ ${15.7_{ - 2.9}^{ + 3.2}}$	${0.32}_{- 0.02}^{+ 0.17}$ ${0.32_{ - 0.02}^{ + 0.17}}$	BSS, bimodal
107261	6.0065	−72.0734	16.21	0.79	0.33	${87.60}_{- 20.91}^{+ 0.12}$ ${87.60_{ - 20.91}^{ + 0.12}}$	${14.3}_{- 1.6}^{+ 1.8}$ ${14.3_{ - 1.6}^{ + 1.8}}$	${0.23}_{- 0.13}^{+ 0.21}$ ${0.23_{ - 0.13}^{ + 0.21}}$
110506	5.9949	−72.0799	16.76	0.77	0.36	8.94 ±0.01	33.9 ±1.6	${0.03}_{- 0.02}^{+ 0.04}$ ${0.03_{ - 0.02}^{ + 0.04}}$	SSG, X-ray, ELO
112447	5.9877	−72.0738	12.49	0.80	0.27	${94.26}_{- 0.22}^{+ 0.24}$ ${94.26_{ - 0.22}^{ + 0.24}}$ `	11.9 ±0.6	${0.05}_{- 0.04}^{+ 0.06}$ ${0.05_{ - 0.04}^{ + 0.06}}$
129292	6.0766	−72.0601	14.73	0.82	0.17	${27.14}_{- 19.29}^{+ 0.06}$ ${27.14_{ - 19.29}^{ + 0.06}}$	${9.6}_{- 0.9}^{+ 1.0}$ ${9.6_{ - 0.9}^{ + 1.0}}$	${0.07}_{- 0.04}^{+ 0.09}$ ${0.07_{ - 0.04}^{ + 0.09}}$	bimodal
132746	6.0573	−72.0596	17.19	0.74	0.14	${8.46}_{- 0.2}^{+ 0.01}$ ${8.46_{ - 0.2}^{ + 0.01}}$	${16.5}_{- 1.5}^{+ 1.2}$ ${16.5_{ - 1.5}^{ + 1.2}}$	${0.06}_{- 0.05}^{+ 0.11}$ ${0.06_{ - 0.05}^{ + 0.11}}$	SSG, WF2-V32, bimodal
132812	6.0570	−72.0549	18.29	0.72	0.23	${52.77}_{- 0.31}^{+ 7.94}$ ${52.77_{ - 0.31}^{ + 7.94}}$	${13.5}_{- 2.4}^{+ 3.7}$ ${13.5_{ - 2.4}^{ + 3.7}}$	${0.23}_{- 0.16}^{+ 0.23}$ ${0.23_{ - 0.16}^{ + 0.23}}$
133593	6.0512	−72.0623	17.10	0.78	0.43	16.71 ±0.01	31.7 ±1.7	${0.06}_{- 0.05}^{+ 0.07}$ ${0.06_{ - 0.05}^{ + 0.07}}$
155735	6.0718	−72.0508	17.02	0.76	0.39	6.77 ±0.01	${39.9}_{- 1.4}^{+ 1.6}$ ${39.9_{ - 1.4}^{ + 1.6}}$	${0.03}_{- 0.02}^{+ 0.04}$ ${0.03_{ - 0.02}^{ + 0.04}}$	SSG, ELO
1004589	5.9146	−72.0806	17.17	0.84	0.44	35.18 ±0.03	${25.5}_{- 1.6}^{+ 2.0}$ ${25.5_{ - 1.6}^{ + 2.0}}$	0.32 ±0.04
1009837	5.9084	−72.0830	17.84	0.88	0.49	${425.44}_{- 7.73}^{+ 8.15}$ ${425.44_{ - 7.73}^{ + 8.15}}$	${11.4}_{- 1.2}^{+ 1.3}$ ${11.4_{ - 1.2}^{ + 1.3}}$	${0.08}_{- 0.06}^{+ 0.11}$ ${0.08_{ - 0.06}^{ + 0.11}}$

Notes. The Keplerian parameters were calculated using UltraNest. The columns list the ACS source ID, the right ascension and declination coordinates, the apparent visual magnitude in the F606W filter, the estimated primary and (minimum) companion stellar masses, the period, the RV semi-amplitude, and the eccentricity. Stars showing an excess in Hα are marked as emission line objects (ELO) and binaries with bimodal posterior distributions are indicated in the notes column.

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