Stellar and circumstellar properties of visual binaries in the Orion Nebula Cluster

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Table 7

Derived accretion disk properties.

	EW(Brγ)	F(Brγ)		Ṁ	K − L′	Δ(K − L′)	T Tauri
Name	(Å)	(10^-18 W m^-2)	log (L_acc/L_⊙)	(10^-9 M_⊙ yr^-1)	(mag)	(mag)	type^a

JW 63 A	<0.91	<0.7	<–2.38	<0.5	0.10 ± 0.04	−0.09 ± 0.06	W
JW 63 B	<1.60	<2.8	<–1.65	<3.6	0.08 ± 0.04	−0.20 ± 0.07	W
JW 81 A	<0.72	<2.5	<–1.71	<2.7	0.10 ± 0.08	−0.09 ± 0.10	W
JW 81 B	<1.14	<1.2	<–2.10	<1.1	0.11 ± 0.09	−0.18 ± 0.09	W
JW 128 A	<1.20	<7.3	<–1.12	<15.0	0.27 ± 0.03	0.01 ± 0.06	W
JW 128 B	<1.21	<7.3	<–1.13	<13.6	0.74 ± 0.03	0.47 ± 0.07	C
JW 176 A	<1.10	<9.5	<–0.98	<20.2	0.85 ± 0.03	0.69 ± 0.04	C
JW 176 B	<1.53	<10.0	<–0.95	<23.8	0.26 ± 0.03	−0.03 ± 0.07	W
JW 248 Aa	<0.71	<5.6	<–1.27	<12.7	1.00 ± 0.06	0.60 ± 0.07	C
JW 248 B	<2.14	<4.8	<–1.36	<105	0.66 ± 0.05	0.01 ± 0.15	W
JW 391 A	8.2 ± 0.5	29.8 ± 2.6	−0.35 ± 0.12	50 ± 14	0.90 ± 0.03	0.79 ± 0.03	C
JW 391 B	<1.62	<1.8	<–1.89	<12.1	0.33 ± 0.04	−0.19± 0.08	W
JW 709 A	<0.71	<1.4	<–2.04	<1.1	0.20 ± 0.10	0.03 ± 0.10	W
JW 709 B	<0.67	<0.5	<–2.61	<0.2	0.15 ± 0.10	−0.05 ± 0.11	W
JW 867 A	0.6 ± 0.2	1.1 ± 1.0	−2.16 ± 0.51	0.9 ± 1.1	0.60 ± 0.04	0.46 ± 0.05	C
JW 867 B	1.8 ± 0.2	6.1 ± 3.4	−1.22 ± 0.41	9.1 ± 6.8	0.69 ± 0.04	0.50 ± 0.05	C

Notes. Equivalents width given as negative values.

^(a)

Based on the value of Δ(K − L′) such as the presence of an inner disk (T Tauri type C) corresponds to Δ(K − L′) > 0 at the 3σ level.

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