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Table 1

Observed objects in Chamaeleon.

Objecta RA Dec System Bin. Spectral- SpT Dist. Dist. 2MASS Backg.e
[h m s]a,b [° ′ ′′]a,b architecturec Ref. types Ref. [pc] Ref. K [mag]d density

RX J0915.5-7609 09 15 29.12 –76 08 47.2 ** 1 K7+? 2 168 3 8.488 0.135
RX J0919.4-7738 09 19 24.96 –77 38 37.0 SB2+** 4, 2, 1 G7+?+K0+? 5 57 6 6.780 0.137
RX J0935.0-7804 09 34 56.04 –78 04 19.4 ** 1 M2+? 2 168 3 8.889 0.132
RX J0952.7-7933 09 53 13.74 –79 33 28.5 *+SB2 2, 1 F6?+F6+F6? 2 170? 7 7.994 0.122
RX J1014.2-7636 10 14 08.07 –76 36 32.8 ** 1 M3+? 2 165? 8.874 0.154
SZ Cha 10 58 16.77 –77 17 17.1 SB?+*+w* 8, 9 K0+M5+? 9, 10 165 Cha I 7.758 0.144
Ced 110 IRS 2 11 06 15.41 –77 21 57.0 **+w* 10, 11 G5+?+? 12 165 Cha I 6.419 0.056
Cha Hα 2 11 07 42.46 –77 33 59.4 ** 13, 14 M6+M6? 15 165 Cha I 10.675 0.062
VW Cha 11 08 01.49 –77 42 28.9 SB?+**+w* 16, 17 K6+K7+?+M2.5 18 165 Cha I 6.962 0.088
RX J1109.4-7627 11 09 17.70 –76 27 57.8 ** 19, 20 K7+? 2 165 Cha I 8.701 0.141
HD 97300 11 09 50.02 –76 36 47.7 ** 8 B9+? 21 179 6 7.149 0.098
WX Cha 11 09 58.74 –77 37 08.9 ** 8 K0-M1.25+? 12 165 Cha I 7.970 0.096
WY Cha 11 10 07.05 –76 29 37.7 **+w* 20, 10 K2-M0+?+? 12 165 Cha I 8.451 0.127
HJM C 7-11 11 10 38.02 –77 32 39.9 SB?+*+w* 8, 22 K3+?+? 2 165 Cha I 8.277 0.107
Sz 41 11 12 24.42 –76 37 06.4 SB?+*+w* 23 K4+?+G8 2, 24 165 Cha I 7.999 0.166
HM Anon 11 12 42.69 –77 22 23.1 ** 8 G8+? 25 165 Cha I 7.880 0.124

Notes. 

(a)

Taken from the SIMBAD database (Wenger et al. 2007).

(b)

International Celestial Reference System (ICRS) coordinates (epoch = J2000).

(c)

Previously known and supposed multiplicity of the objects: *: star, **: binary, SB: spectroscopic binary, SB2: double-lined spectroscopic binary, w*: wide stellar companion candidate.

(e)

Expected number of background stars in the NACO S13 field of view (see text).

References. (1) Köhler (2001). (2) Covino et al. (1997). (3) Sartori et al. (2003). (4) Torres (1986). (5) Torres et al. (2006). (6) van Leeuwen (2007). (7) Frink et al. (1998). (8) Ghez et al. (1997). (9) Reipurth et al. (2002). (10) Kraus & Hillenbrand (2007). (11) Simultaneously imaged. by Lafrenière et al. (2008) and by us (here). (12) Luhman (2007). (13) supposed by Neuhäuser et al. (2002). (14) confirmed by Ahmic et al. (2007), Lafrenière et al. (2008) and Schmidt et al. (2008b). (15) Schmidt et al. (2008b). (16) wide companion candidate: Reipurth & Zinnecker (1993), close binary: Brandner (1992), close triple: Brandeker et al. (2001). (17) Possibly SB in Melo (2003) and Torres et al. (2006), but could be the signal of the close triple. (18) Brandner & Zinnecker (1997), Sz 23 (VW Cha D?): Comerón et al. (1999). (19) Damjanov et al. (2007). (20) Lafrenière et al. (2008). (21) Rydgren (1980). (22) SB?: Torres et al. (2006), w*: Kraus & Hillenbrand (2007). (23) **, w*: Brandner (1992); Reipurth & Zinnecker (1993), SB? (primary and secondary in spectrograph entrance window): Reipurth et al. (2002). (24) Hyland et al. (1982). (25) Preibisch (1997).

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