2008MNRAS.384..150L

Query : 2008MNRAS.384..150L

2008MNRAS.384..150L - Mon. Not. R. Astron. Soc., 384, 150-160 (2008/February-2)

The LuckyCam survey for very low mass binaries - II. 13 new M4.5-M6.0 binaries.

LAW N.M., HODGKIN S.T. and MacKAY C.D.

Abstract (from CDS):

We present results from a high angular resolution survey of 77 very low mass (VLM) binary systems with 6.0 ≤ V - K colour ≤ 7.5 and proper motion ≥0.15arcsec/yr. 21 VLM binaries were detected, 13 of them new discoveries. The new binary systems range in separation between 0.18 and 1.3arcsec. The distance-corrected binary fraction is 13.6+6.5–4 per cent, in agreement with previous results. Nine of the new binary systems have projected separations >10au, including a new wide VLM binary with 27au projected orbital separation. One of the new systems forms two components of a 2300au separation triple system. We find that the projected separation distribution of the binaries with V - K < 6.5 in this survey appears to be different from that of redder (lower mass) objects, suggesting a possible rapid change in the orbital radius distribution at around the M5 spectral type. The target sample was also selected to investigate X-ray activity among VLM binaries. There is no detectable correlation between excess X-ray emission and the frequency and binary properties of the VLM systems.

Abstract Copyright: © 2008 The Authors

Journal keyword(s): instrumentation: high angular resolution - methods: observational - techniques: high angular resolution - binaries: close - stars: low-mass, brown dwarfs

Simbad objects: 83

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Number of rows : 83
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 G 242-52 PM* 00 23 31.8050206905 +77 11 26.611834948   16.0 14 14.2   M4V 37 0
2 LP 585-55 ** 00 35 43.1173266744 +02 33 13.561614756   17.6   14.9   M5.0+M6.0 12 0
3 G 132-25 ** 00 45 56.6766596592 +33 47 11.107587696   17.1   14.3   M5Ve 21 0
4 LP 294-2 PM* 00 46 13.1273882297 +33 50 10.704140750   18.7   15.8   esdM2.5 13 0
5 LSPM J0115+4702S ** 01 15 50.242176 +47 02 02.25312   16.48 14.85 14.24   M4.5+M5.0 13 0
6 V* TZ Ari PM* 02 00 12.9563198327 +13 03 07.000569241 15.406 14.100 12.298 10.943 9.195 M4.5V 325 0
7 G 244-49 PM* 02 07 10.3461614568 +64 17 11.369717700   16.8   14.216   dM4.5 40 0
8 LSPM J0227+5432 ** 02 27 17.1134285568 +54 32 47.835435552   16.3   14.3   dM5.0 11 0
9 NGC 1039 OpC 02 42 09.1 +42 44 02           ~ 467 0
10 G 134-63 LM* 02 59 46.3464208488 +38 55 36.070307796   16.6   14.7   M5V 30 0
11 LSPM J0330+5413 PM* 03 30 48.8903332104 +54 13 55.155593784   17.3 15.96 14.9 12.06 M7V 30 0
12 1RXS J033609.2+311853 PM* 03 36 08.7018479472 +31 18 39.516789096   15.655 13.995 13.741 11.14 M4.5V 44 0
13 G 248-12 PM* 04 06 37.2406689223 +79 16 01.427916644   16.4   14.7   dM5.5 31 0
14 G 247-12 PM* 04 08 23.7931249080 +69 10 59.086899840   16.4   14.4   M4.5V 19 0
15 LP 534-29 ** 04 09 22.275888 +05 46 26.82120   17.0   15.94   M6V 16 0
16 LSPM J0412+3529 PM* 04 12 34.9242592944 +35 29 59.342250156   17.1   14.8   M5V 11 0
17 G 222-2 PM* 04 14 01.9525374712 +82 15 36.414203412   16.90 15.22 15.03   M5V 25 0
18 G 7-34 PM* 04 17 18.5336543303 +08 49 22.015096328   15.6 13.84 12.50 10.75 M5V 74 0
19 G 222-3 PM* 04 20 12.6435477456 +84 54 06.276479688   17.030 15.410 15.119   dM5.5 21 0
20 G 39-9 PM* 04 22 33.4968841037 +39 00 43.633490056   16.93   14.8   M5V 36 0
21 LP 595-21 PM* 04 32 55.5101722080 +00 06 34.664823432   16.9 14.8 14.42   M4 14 0
22 G 8-41 PM* 04 33 33.9630342177 +20 44 45.842102220   16.21 14.530 14.133 11.43 M5V 51 0
23 LP 415-302 PM* 04 39 31.6219906599 +16 15 42.955193461   17.8 15.74 14.4 12.14 M5.5Ve 30 0
24 LSPM J0501+2237 LM* 05 01 18.0176515573 +22 37 00.913060690   16.5   14.2   M5V 36 0
25 LP 359-186 ** 05 03 05.657160 +21 22 35.76900   16.42 14.63 14.48   M5.0V 29 0
26 HD 285190 SB* 05 03 16.0891758816 +21 23 56.214510756       10.581   M1.5V 35 0
27 IRAS F05439+0024 TT* 05 46 31.0591924104 +00 25 33.743738820           M4.5 19 0
28 G 192-15 PM* 06 02 29.1943155520 +49 51 56.155536974   16.32   13.4   M5.0V 88 0
29 LSPM J0604+0741 LM* 06 04 38.8726591104 +07 41 54.550684536   16.9   14.8   M6V 17 0
30 LP 362-121 LM* 06 10 22.464504 +22 34 20.26128   17.9   15.98   M6V 17 0
31 LP 205-44 PM* 06 31 50.7381977376 +41 29 45.488163624   16.50   14.462   dM5.0 65 0
32 G 250-31 ** 06 57 57.118872 +62 19 19.36632   14.8   13.420   M6V+M5V 70 0
33 LP 364-102 PM* 07 06 40.4828614152 +26 24 59.917124124   17.5   14.7   M5V 14 0
34 LP 206-11 ** 07 11 11.518536 +43 29 56.66532   16.7 15.90 15.746 11.92 M5.5V 44 0
35 LSPM J0722+7305 ** 07 22 31.678248 +73 05 04.19028   17.06 15.28 15.06   M4.5 8 0
36 G 89-32 ** 07 36 25.118208 +07 04 43.13928   14.99 13.24 12.78   M4.5V 74 0
37 LP 162-47 LM* 07 38 47.210400 +49 25 25.64904   17.91 16.11 15.61   M6V 17 0
38 LSPM J0738+1829 LM* 07 38 50.8183921224 +18 29 20.219264412   17.4   15.2   M6V 16 0
39 LP 604-16 PM* 08 10 48.0502202016 +01 09 11.710175652   16.9   14.6   M5V 17 0
40 G 251-58 PM* 08 13 44.5516057698 +79 18 11.458469976   16.4 14.80 13.44 11.66 M5V 34 0
41 LP 367-217 PM* 08 24 26.8227511080 +25 55 36.623073252   17.0   14.4   dM5.0 15 0
42 LP 35-347 PM* 08 25 52.8154656671 +69 02 01.090514636   17.71   14.5   M7V 40 0
43 G 51-15 PM* 08 29 49.3527921926 +26 46 33.624143059   16.87   14.736   M6.5Ve 326 0
44 G 234-45 PM* 08 41 20.1286588424 +59 29 50.444062516   16.98   14.1   dM5.5 111 0
45 LP 209-59 PM* 08 49 08.6654437348 +39 36 26.374093232   16.9   14.7   M5V 26 0
46 G 9-38 ** 08 58 15.061776 +19 45 46.96020   15.58   13.40   M7V+M7V 113 0
47 G 9-38A PM* 08 58 15.0749311179 +19 45 48.258121374     13.93     M8Ve 99 0
48 LP 312-51 ** 08 59 29.300352 +29 18 18.09216   17.2   15.944   M5.5Ve 13 0
49 G 115-71 ** 09 21 49.0559877063 +43 30 28.397442371   15.71 13.92 13.58   M4V 41 0
50 LP 370-26 PM* 09 29 11.0784036892 +25 58 09.277485869   18.16 16.457 14.808 12.847 M5.0 29 1
51 HD 82443B PM* 09 32 48.2424253608 +26 59 43.776179088   16.9   14.5   M5.5V 42 1
52 G 42-24 PM* 09 53 55.1726816646 +20 56 46.793032097   15.4   13.729   M4.0Ve 69 0
53 G 49-32 PM* 09 56 26.9569645590 +22 39 01.071052347   15.7   13.817   M4V 44 0
54 LP 549-6 PM* 09 58 56.5013178687 +05 57 59.927369082   16.51 14.707 14.39   M4.5V 31 0
55 * 20 LMi B PM* 10 00 50.2251808863 +31 55 45.199255664   17.1   16.349   M6.0V 45 0
56 * 20 LMi PM* 10 01 00.6568762394 +31 55 25.213014837   6.05 5.37 4.9   G3VaHdel1 430 0
57 G 253-34 PM* 10 01 11.1113600877 +81 09 22.564331189   16.94   14.1   dM5.0 19 0
58 G 195-55 ** 10 02 49.239888 +48 27 32.30604   16.6   15.024 12.4 M5.5V 38 0
59 G 176-34 SB* 11 25 00.5508949718 +43 19 39.268018071   16.5   14.6   M5V 27 0
60 G 13-22 PM* 12 14 16.5489621254 +00 37 26.362449419   15.40   13.309   M4.5Ve 98 0
61 LP 435-538 PM* 12 40 41.1531509400 +19 55 23.940211440   17.1   14.2   M5V 16 0
62 Wolf 461 PM* 13 00 33.5221795982 +05 41 07.996620384   15.12   13.041   M4.5Ve 156 0
63 G 165-61 LM* 14 17 02.770680 +31 42 46.67904   14.73 13.108 12.831   M4.5Ve 66 0
64 LP 560-1 PM* 14 19 29.5831789632 +02 54 36.478618740   16.6   14.375   M5.0V 30 0
65 LP 381-49 LM* 14 22 20.0788528776 +23 52 35.068590228   17.5   14.3   M5V 20 0
66 G 256-25 PM* 15 49 55.1359495320 +79 39 51.588172332   16.3   14.408   M5.0V 46 0
67 G 180-11 ** 15 55 31.744608 +35 12 03.18600   15.41   13.464   M4V 64 0
68 G 240-23 PM* 16 40 20.6348182449 +67 36 04.738961834   17.6   15.565   M7V 54 0
69 G 169-29 PM* 16 50 57.9368858559 +22 27 05.665234421   15.86 14.29 13.804   M5V 56 0
70 LSPM J1832+2030 ** 18 32 02.901264 +20 30 57.69432   17.6   14.87   M5V 15 0
71 V* V816 Her PM* 18 42 44.9786088496 +13 54 16.727572582   14.8 12.86 11.58 9.95 M5V 73 0
72 G 141-36 PM* 18 48 17.5373479643 +07 41 21.186505469   15.6   13.817   M5.0V 70 0
73 G 185-23 PM* 19 26 01.6243505784 +24 26 17.117782944   16.2 14.300 13.877 11.19 M4.5V 29 0
74 G 208-44 Er* 19 53 54.4821159649 +44 24 51.341564299   15.31 13.126 13.083 9.78 M5.5Ve 220 1
75 LP 73-196 ** 20 23 18.032904 +67 10 10.27128   17.1   14.88   M5.0+M5.0 9 0
76 RX J2059.3+5303 ** 20 59 20.3438116465 +53 03 04.816308955   15.713 14.076 13.920   M3.5V 17 0
77 G 262-38 Em* 21 17 21.9140735444 +64 02 39.454402282   16.9   14.5   M6V 20 0
78 G 264-22 PM* 22 15 26.1470488944 +66 13 27.719923980   14.6   12.442   M3V 35 0
79 HD 239960 ** 22 27 59.47299 +57 41 45.2325           M3 286 0
80 LP 642-7 PM* 23 08 44.4814315752 +03 35 11.387109264   17.6   14.2   dM4.5 10 0
81 LP 12-90 PM* 23 22 53.8269513264 +78 47 38.567344704   17.99 16.16 14.61 12.54 M4.5V 28 0
82 1RXS J232702.1+271039 PM* 23 27 02.1808489416 +27 10 36.868627956   17.1   13.6   M5V 16 0
83 Ross 248 BY* 23 41 55.0363002516 +44 10 38.818911116   14.19   11.1   M5.0V 361 0

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