2006ApJ...637.1056B

Query : 2006ApJ...637.1056B

2006ApJ...637.1056B - Astrophys. J., 637, 1056-1066 (2006/February-1)

A Hubble Space Telescope Advanced Camera for Surveys search for brown dwarf binaries in the Pleiades open cluster.

BOUY H., MORAUX E., BOUVIER J., BRANDNER W., MARTIN E.L., ALLARD F., BARAFFE I. and FERNANDEZ M.

Abstract (from CDS):

We present the results of a high-resolution imaging survey for brown dwarf binaries in the Pleiades open cluster. The observations were carried out with the Advanced Camera for Surveys (Pavlovsky and coworkers) on board the Hubble Space Telescope. Our sample consists of 15 bona fide brown dwarfs. We confirm two binaries and detect their orbital motion, but we did not resolve any new binary candidates in the separation range between 5.4 and 1700 AU and masses in the range 0.035-0.065 M☉. Together with the results of our previous study (Martín and coworkers), we can derive a visual binary frequency of 13.3+13.7–4.3% for separations greater than 7 AU, masses in the range 0.055-0.065 M☉, and mass ratios in the range 0.45-0.9<q<1.0. The other observed properties of Pleiades brown dwarf binaries (distributions of separation and mass ratio) appear to be similar to their older counterparts in the field.

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Journal keyword(s): Stars: Binaries: General - Galaxy: Globular Clusters: General - globular clusters: individual (M45) - globular clusters: individual (Pleiades) - Stars: Low-Mass, Brown Dwarfs - Stars: Luminosity Function, Mass Function

Nomenclature: Table 1: Cl* Melotte 22 PlIZ NNNN (Nos 51, 161, 300, 1262, 2141) added.

Simbad objects: 33

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Number of rows : 33
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Cl* Melotte 22 PLIZ 4 LM* 03 41 40.8997112232 +25 54 24.307734816           ~ 8 0
2 Cl* Melotte 22 PLIZ 8 LM* 03 43 00.1664960928 +24 43 52.633957620         18.80 M7.9 24 0
3 Cl* Melotte 22 PLIZ 16 LM* 03 43 40.28880 +24 30 11.3976         19.50 M8.3 22 0
4 Cl* Melotte 22 PLIZ 1262 BD* 03 44 27.28298 +25 44 41.9744         22.235 L2.0 6 0
5 Cl* Melotte 22 PLIZ 2141 BD* 03 44 31.27050 +25 35 15.0036         22.043 L1.8 6 0
6 Cl* Melotte 22 PLIZ 9 LM* 03 44 35.1625882416 +25 13 43.002580476         18.66 M9.3 18 0
7 Cl* Melotte 22 PLIZ 26 LM* 03 44 48.66537 +25 39 17.5825           ~ 2 0
8 Cl* Melotte 22 IPMBD 29 LM* 03 45 31.3588216104 +24 52 47.651834928           ~ 12 0
9 Cl* Melotte 22 IPMBD 25 LM* 03 46 26.0867944944 +24 05 09.641476032           ~ 15 0
10 Cl* Melotte 22 PLIZ 51 LM* 03 46 36.29520 +25 33 35.2857           ~ 1 0
11 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
12 Cl* Melotte 22 BPL 152 LM* 03 47 39.0098259096 +24 36 22.395849876       20.17 17.91 M6.0 33 0
13 Cl* Melotte 22 PLIZ 7 LM* 03 48 12.1215915504 +25 54 28.359163908           ~ 2 0
14 Cl* Melotte 22 PLIZ 29 LM* 03 49 45.24310 +26 50 50.3368           ~ 2 0
15 Cl* Melotte 22 PLIZ 300 LM* 03 51 15.60427 +23 47 04.7802           ~ 1 0
16 Cl* Melotte 22 PLIZ 12 LM* 03 51 25.5680723568 +23 45 21.465842004         19.00 M8.0 66 0
17 Cl* Melotte 22 PLIZ 17 LM* 03 51 26.6574321096 +23 30 10.175836572           ~ 2 0
18 Cl* Melotte 22 PLIZ 161 LM* 03 51 29.470 +24 00 37.40           ~ 3 0
19 Cl* Melotte 22 PLIZ 23 LM* 03 51 33.46284 +24 10 14.2474           ~ 2 0
20 Cl* Melotte 22 PLIZ 10 LM* 03 51 44.9383754496 +23 26 39.562373112         18.45 ~ 17 0
21 Cl* Melotte 22 PLIZ 31 LM* 03 51 47.660 +24 39 58.90         20.944 M8.1 7 0
22 Cl* Melotte 22 PLIZ 3 LM* 03 52 06.7084395888 +24 16 00.643676448         18.02 M6.0 28 0
23 Cl* Melotte 22 PLIZ 15 LM* 03 52 18.6548951688 +24 04 27.555121740           ~ 11 0
24 Cl* Melotte 22 PLIZ 25 LM* 03 52 44.30 +24 24 50.0           ~ 4 0
25 Cl* Melotte 22 PLIZ 14 LM* 03 53 32.1888623856 +26 06 55.946923416           ~ 2 0
26 Cl* Melotte 22 PLIZ 6 LM* 03 53 55.1153189928 +23 23 36.301442892         17.752 M8.0 26 0
27 Cl* Melotte 22 PLIZ 20 LM* 03 54 05.32560 +23 33 59.7708         19.571 M9.0 16 0
28 Cl* Melotte 22 PLIZ 28 BD* 03 54 14.05703 +23 17 52.2063         20.760 L0.0 9 0
29 Cl* Melotte 22 PLIZ 13 LM* 03 55 04.3513018872 +26 15 50.406424200           ~ 6 0
30 Cl* Melotte 22 BRB 13 LM* 03 55 12.5863618464 +23 17 37.640681016         18.62 M7.0 16 0
31 Cl* Melotte 22 PLIZ 2 LM* 03 55 23.0746108704 +24 49 05.221060212         17.719 M7.1 23 0
32 Cl* Melotte 22 PLIZ 21 LM* 03 55 27.61660 +25 49 41.0330           ~ 3 0
33 Cl* Melotte 22 PLIZ 19 LM* 03 56 16.3834866216 +23 54 50.870560248           ~ 3 0

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