Protoplanetary disks of T Tauri binary systems in the Orion nebula cluster

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Table 3

Relative photometry and astrometry of the observed binaries^†.

ΔJ

ΔH

ΔK_s

ΔK

Sep^a

PA^b

Name

[mag]

[′′]

[°]

Ref.

[AD95] 1468

0.75 ± 0.10

0.66 ± 0.02

0.10 ± 0.05

1.08

76.9

T, 1

[AD95] 2380

≳2.5^c

2.62 ± 0.03

2.99 ± 0.15

0.59

77.6

T,1

JW 235

0.46 ± 0.02

0.10 ± 0.02

0.47 ± 0.15

0.35

163.6

T, 1

JW 260

0.53 ± 0.02

0.40 ± 0.02

0.17 ± 0.05

0.35

292.2

T, 1

JW 519^e

2.8 ± 0.2

2.6 ± 0.1

0.36

204.3

JW 553

2.1 ± 0.3

3.2 ± 0.3

3.19 ± 0.10

0.384 ± 0.004

248.1 ± 0.3

JW 566

0.20 ± 0.03

0.39 ± 0.02

0.78 ± 0.02

0.86

33.8

JW 598

3.19

0.9

JW 648

1.12 ± 0.03

1.16 ± 0.03

1.23 ± 0.02

0.68

278.7

JW 681

1.53

1.09

214

3,4

JW 687

1.63 ± 0.05

1.15 ± 0.07^d

0.53 ± 0.07

0.47

232.6

JW 765

0.08 ± 0.02

0.12 ± 0.01

0.06 ± 0.10

0.33

16.5

T, 1

JW 876

0.50 ± 0.05

0.49

JW 959

0.07 ± 0.03

0.34

JW 974

1.16 ± 0.04

1.26 ± 0.04

1.41 ± 0.05

0.32

128.7

T, 1

[HC2000] 73

0.48 ± 0.09

1.13 ± 0.06

1.52 ± 0.07

0.71

266.2 ± 0.5

TCC 15

2.5 ± 0.3

3.3 ± 0.3

3.65 ± 0.1

1.022 ± 0.004

288.2 ± 0.3

TCC 52

1.61 ± 0.03

1.56 ± 0.03

1.64 ± 0.02

0.52

39.24

TCC 55

1.0 ± 0.1^f

2.2 ± 0.3

1.26 ± 0.10

0.256 ± 0.004

153.1 ± 0.3

TCC 97

1.8 ± 0.15

1.4 ± 0.2

0.88

98.5

Notes.

^(†)

Reproduced here are only the targets observed with NACO. The photometry of the six additional targets observed with Gemini/NIRI can be found in Correia et al. (in prep.).

^(a)

Uncertainty in the separation: Δsep = 001 unless otherwise noted.

^(b)

Position angle uncertainty: ΔPA = 0.5° unless otherwise noted.

^(c)

The companion to [AD95] 2380A is detected with less than 3σ significance in J-band. The number quoted here is a lower limit.

^(d)

This number is an average of two independent measurements that differ by 0.16 mag.

^(e)

The elongated shape of JW 519’s primary suggests the primary to be binary itself. The photometry for JW 519, however, is based on the assumption of a single central object since separate components cannot be identified.

^(f)

Reanalysis of MAD data published in Bouy et al. (2008).

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