Orbits and masses in the young triple system TWA 5

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Volume 558 (October 2013)

A&A, 558 (2013) A80

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Table 1

Astrometric measurements of TWA 5 Aa-b.

Date and time (UT)		Filter	d [mas]	PA [°]	Flux ratio	Reference	\| Δd\|/σ_d	\| ΔPA\|/σ_PA

2000 Feb. 20		H	54.8 ±0.5	25.9 ±1.0	0.92 ± 0.02	1	1.4	0.7
2000 Feb. 22		K ′	54.0 ± 3.0	24.2 ± 3.0	0.90 ± 0.06	2	0.5	0.3
2001 May 6		K	35.1 ± 0.2	12.7 ± 1.1	0.79 ± 0.06	3	1.3	0.1
2002 May 23		K	13.0 ± 3.0	313.7 ± 3.0	0.81 ± 0.05	3	0.3	3.5
2003 Dec. 5		K	30.6 ± 0.4	227.4 ± 5.5	0.82 ± 0.03	3	0.8	0.7
2004 Dec. 18		K	51.5 ± 0.9	32.1 ± 2.2	0.72 ± 0.05	3	1.2	0.4
2005 Feb. 16		Fe ii	53.0 ± 1.0	32.6 ± 5.2	0.78 ± 0.11	3	1.4	0.2
2005 May 27		K	57.4 ± 0.3	29.7 ± 0.3	0.81 ± 0.03	3	1.5	0.7
2005 Dec. 12		H	57.1 ± 2.0	28.9 ± 1.0	0.92 ± 0.03	3	0.2	2.3
2007 Jul. 9	23:22	Ks	36.6 ± 4.0	7.5 ± 2.0	0.89 ± 0.02	4	1.3	1.2
2011 Jan. 27	04:36	H	52.9 ± 0.3	31.0 ± 0.6	0.90 ± 0.02	4	0.8	2.1
	04:45	J			0.98 ± 0.05	4
2011 May 23	00:26	H	59.9 ± 2.4	29.0 ± 2.4	0.92 ± 0.05	4	1.0	0.5
	00:40	J			0.78 ± 0.15	4
2012 Jan. 2	07:29	H	60.6 ± 0.5	26.1 ± 0.4	–^a	4	6.4^b	0.7^b
2012 Jun. 19	22:54	H	51.7 ± 0.3	23.4 ± 0.4	0.86 ± 0.01	4	1.1	0.6
	23:01	J			0.76 ± 0.03	4
2013 Jan. 17	07:05	H	42.4 ± 0.3	18.3 ± 0.4	0.83 ± 0.01	4	1.3	1.4
	07:13	J			0.87 ± 0.04	4

Notes.

^(a)

Detector saturated.

^(b)

Not used for the orbit fit.

Reference. (1) Macintosh et al. (2001); (2) Brandeker et al. (2003); (3) Konopacky et al. (2007); (4) this work.

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