2010A&A...520A..54B


Query : 2010A&A...520A..54B

2010A&A...520A..54B - Astronomy and Astrophysics, volume 520, A54-54 (2010/9-2)

Lucky imaging survey for southern M dwarf binaries.

BERGFORS C., BRANDNER W., JANSON M., DAEMGEN S., GEISSLER K., HENNING T., HIPPLER S., HORMUTH F., JOERGENS V. and KOEHLER R.

Abstract (from CDS):

While M dwarfs are the most abundant stars in the Milky Way, there is still large uncertainty about their basic physical properties (mass, luminosity, radius, etc.) as well as their formation environment. Precise knowledge of multiplicity characteristics and how they change in this transitional mass region, between Sun-like stars on the one side and very low mass stars and brown dwarfs on the other, provide constraints on low mass star and brown dwarf formation. In the largest M dwarf binary survey to date, we search for companions to active, and thus preferentially young, M dwarfs in the solar neighbourhood. We study their binary/multiple properties, such as the multiplicity frequency and distributions of mass-ratio and separation, and identify short period visual binaries, for which orbital parameters and hence dynamical mass estimates can be derived in the near future. The observations are carried out in the SDSS i' and z' band using the Lucky Imaging camera AstraLux Sur at the ESO 3.5m New Technology Telescope. Lucky Imaging is a very efficient way of observing a large sample of stars at an angular resolution close to the diffraction limit. In the first part of the survey, we observed 124 M dwarfs of integrated spectral types M0-M6 and identified 34 new and 17 previously known companions to 44 stars. We derived relative astrometry and component photometry for these binary and multiple systems. More than half of the binaries have separations smaller than 1'' and would have been missed in a simply seeing-limited survey. Correcting our sample for selection effects yields a multiplicity fraction of 32±6% for 108 M dwarfs within 52pc and with angular separations of 0.1''-6.0'', corresponding to projected separations of 3-180AU at median distance 30pc. Compared to early-type M dwarfs (M>0.3M), later-type (and hence lower mass) M dwarf binaries appear to have closer separations, and more similar masses.

Abstract Copyright:

Journal keyword(s): techniques: high angular resolution - binaries: visual - stars: low-mass - brown dwarfs

Simbad objects: 146

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Number of rows : 146
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 EXO 001239-7307.3 Er* 00 15 02.3404604760 -72 50 32.799012648     12.7     M1 18 0
2 BPS CS 31060-0015 ** 00 15 58.0735637904 -16 36 57.630725208   14.88 13.18 12.96   M4.1V 23 0
3 UCAC4 098-000270 PM* 00 17 14.4256448304 -70 32 02.086897416   13.390 12.042 11.725   M0.5 10 0
4 L 290-28 LM* 00 21 37.2621541564 -46 05 33.392805493 14.749 13.774 12.240 11.136 9.93 M3Ve 42 0
5 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3752 0
6 G 267-100 ** 00 25 04.3052806872 -36 46 17.841632844   14.03 12.49 12.12   M2.5 15 0
7 GJ 2006 B Y*? 00 27 50.3535388992 -32 33 24.130761048   14.66 13.25 12.04 10.48 M3.5Ve 33 0
8 GR* 9 ** 00 28 14.3509222608 -32 27 55.621057680   16.81 15.23 14.99   M5 20 0
9 V* FT Psc B PM* 00 50 33.136765 +24 49 01.69048           ~ 14 0
10 V* FT Psc LM* 00 50 33.2510237725 +24 49 00.181271056 14.821 13.779 12.151 10.963 9.422 M4.0Ve 45 1
11 PM J01028+1856 PM* 01 02 50.9874986184 +18 56 54.157583580     14.083 13.661   M4.0V 16 0
12 RX J0107.1-1935 ** 01 07 11.9505 -19 35 36.090   12.915 11.457 11.087 9.421 M1 31 0
13 BD-07 184 ** 01 09 38.77728 -07 10 49.0966           M2.0V 21 0
14 GR* 82 Er* 01 11 23.4374398920 -05 25 38.235124596   15.245 13.667 13.303   M3.5 10 0
15 CD-39 325 EB* 01 13 28.164576 -38 21 02.65032   13.17 11.72 11.38 9.693 M1V+M3V 36 0
16 [PS78] 191 PM* 01 22 50.9356182264 -24 39 50.690658348   15.71 14.24 13.89   M3.5V 44 0
17 G 272-13 LM* 01 24 42.487848 -15 40 45.20208   12.99 11.50 11.01   M1V 14 0
18 LP 767-83 PM* 01 24 43.1545659960 -15 41 17.319793272   17.16 15.44 14.84   ~ 2 0
19 G 271-110 PM* 01 36 55.1765506296 -06 47 38.002431948   15.72 14.00 13.71   M3.5V 54 0
20 RX J0143.7-0602 SB* 01 43 45.1450995480 -06 02 40.207014240   14.631 12.949 12.720   M3.5 25 0
21 CD-40 436 LM* 01 45 21.3263656602 -39 57 20.439088866   12.99 11.56 10.964   M1V 23 0
22 2MASS J01511997+1324525 LM* 01 51 19.9750270680 +13 24 52.236549648           M1.5 6 0
23 RX J0153.5-1459 ** 01 53 50.773992 -14 59 50.34912   13.49 12.01 11.91 9.349 M3 28 0
24 1RXS J020013.6-084106 PM* 02 00 12.7785500088 -08 40 51.914829360   13.87 12.44 12.026 10.109 M2.5 30 0
25 RX J0200.4-0240 ** 02 00 29.732688 -02 39 58.06116   15.843 14.151 13.887   M3.5 9 0
26 LP 709-18 PM* 02 01 43.8676737445 -10 17 29.049785153   16.234 14.477     M4 18 0
27 UCAC3 92-4599 Er* 02 07 01.9955326464 -44 06 44.362466928   14.73 13.21   13.21 M5.5 6 0
28 2MASS J02070786-1810077 PM* 02 07 07.8751693248 -18 10 07.832508888           M4 5 0
29 UCAC4 216-002052 LM* 02 13 30.2739596712 -46 54 50.354297028   15.290 13.851 13.469   M3.0Ve 12 0
30 RX J0215.9-0929 ** 02 15 58.9436570947 -09 29 12.272711051   13.730 12.222 11.930 9.794 M2.5V 32 0
31 CD-31 909 Er* 02 16 41.1975294403 -30 59 18.224571845 14.729 13.588 12.027 10.885 9.406 M3Ve 62 1
32 UCAC3 134-5745 * 02 16 54.6605241576 -23 22 10.323324804       14.65   ~ 1 0
33 UCAC4 334-002479 LM* 02 16 54.8830146672 -23 22 13.357111476       13.63   M3.5 13 0
34 LSPM J0218+1218 PM* 02 18 36.5855148024 +12 18 57.603740616   13.91   11.971   M1.9V 20 0
35 RX J0222.7-6022 Er* 02 22 44.1541907952 -60 22 47.628540948   14.902 13.365 13.038   M3.5Ve 33 0
36 2MASS J02271603-2929263 * 02 27 16.04 -29 29 26.3           M3.5 7 0
37 LP 770-30 PM* 02 30 34.9022100620 -15 43 24.827746397   14.630 13.107 12.829   M2.5 17 0
38 RX J0234.0-1811 ** 02 33 59.860536 -18 11 52.39032   15.511 13.984 13.697 11.453 M3 14 0
39 EXO 0235.2-5216 Er* 02 36 51.7013280528 -52 03 03.600913140   13.59 12.411   9.727 M2Ve 61 0
40 G 75-35 PM* 02 41 15.1372381965 -04 32 17.826269454   15.56 13.79 13.42   M4.5V 32 0
41 RX J0241.3-5725 LM* 02 41 19.127304 -57 25 18.62400   15.15 13.68 13.35   M3 9 0
42 V* AF Hor Er* 02 41 47.3048691480 -52 59 30.641572536   13.70 12.21     M2Ve 41 0
43 LP 993-116 ** 02 45 14.3221 -43 44 10.076   14.34 12.65 12.42   M5 31 0
44 UCAC3 112-6119 SB* 02 48 52.6040408904 -34 04 24.725972496   15.182 13.630 13.35   M3.5Ve 21 0
45 PM J02490-1029 LM* 02 49 02.2709276664 -10 29 22.056751212     12.410 12.149   M2 13 0
46 2MASS J02492136-4416063 LM* 02 49 21.3764426592 -44 16 06.175474032           M3 3 0
47 GSC 08057-00342 PM* 02 54 33.1653392928 -51 08 31.396648128   13.73 12.21     M1.5Ve 25 0
48 CD-26 1122 LM* 03 03 36.7068839928 -25 35 32.849540628   12.42 11.064 10.595   M0Ve 36 0
49 [LM84] 3-13 PM* 03 05 09.7679220821 -37 25 06.000999208   14.572 13.081 12.717 10.843 M2 18 0
50 LP 831-35 LM* 03 10 03.0477383544 -23 41 30.770503908   15.10 13.50 13.161   M3.5Ve 21 0
51 ASAS J031523-2821.4 EB? 03 15 23.4212109360 -28 21 40.480480368   16.34 14.78 14.38 11.942 M3.5 15 0
52 G 77-46 PM* 03 21 46.9232372547 -06 40 24.214996740   12.49 11.314 10.981 9.47 M2V 50 0
53 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 820 1
54 ASAS J032439-3904.3 Er* 03 24 40.5669144336 -39 04 22.748291580   15.71 14.15 13.78 11.395 M4 17 0
55 Cl Melotte 20 OpC 03 26 28 +48 58.5           ~ 807 0
56 V* CK Ari RS* 03 27 14.3431447056 +27 23 08.673329976   12.98 13.657 11.331   M1.0Ve 32 0
57 PM J03433-0819 PM* 03 43 23.3266170816 -08 19 41.273794992   20.6 13.568 13.251   M2.5 7 0
58 G 80-21 Er* 03 47 23.3412414313 -01 58 19.947831323 14.052 13.048 11.537 10.452 9.098 M3.0V 109 0
59 1RXS J040710.6-291823 Ro* 04 07 11.4797729846 -29 18 34.316753906     12.042   10.195 M0 13 0
60 2MASS J04080543-2731349 * 04 08 05.4436284312 -27 31 34.856822856           M3.5 5 0
61 2MASS J04093930-2648489 Er* 04 09 39.3066294264 -26 48 49.090566852           M1.5 12 0
62 RX J0413.4-0139 ** 04 13 26.632800 -01 39 21.17124   15.56 13.96 13.62   M5.3V 23 0
63 1RXS J041417.0-090650 EB? 04 14 17.3079121464 -09 06 54.605273184     13.884 13.612 11.107 M4.3V 37 0
64 2MASS J04175717-3827038 LM* 04 17 57.1684544180 -38 27 03.847162919   15.038 13.450     M3.5 6 0
65 WOH S 6 Er* 04 21 39.0632365512 -72 33 56.047461192     13.422   11.094 M2.5 20 0
66 UCAC4 174-004510 * 04 24 00.9493958640 -55 12 22.421416464   15.051 13.574 13.249   M2.5 14 0
67 UCAC4 331-005234 PM* 04 24 11.5663325136 -23 56 36.260174904   13.701 12.121 11.685   M2.5 9 0
68 Cl Melotte 25 OpC 04 29 47 +16 56.9           ~ 2891 0
69 LP 834-32 LM* 04 35 36.1920843744 -25 27 34.587319140   13.95 12.41 12.08 9.720 M3.5 31 0
70 1RXS J043657.1-161258 Er* 04 36 57.3963396456 -16 13 06.434901480   14.546 13.126 12.813 10.337 M3.5 32 0
71 * 51 Eri PM* 04 37 36.1326090888 -02 28 24.775726260   5.486 5.209     F0IV 212 0
72 StKM 1-497 TT* 04 37 37.4553491592 -02 29 28.950973764   12.04 10.59   8.59 M1.1V 119 0
73 LP 655-43 PM* 04 38 02.5178866152 -05 56 13.392943044   16.147 14.501 13.14 11.41 M4.5 21 0
74 HD 270712 LM* 04 44 10.977552 -70 19 24.44124   12.31 11.11 10.701 8.71 M0V+M1Ve 28 0
75 LP 776-25 Er* 04 52 24.4148135160 -16 49 21.926289432   12.76 11.639 11.237 9.1 M3.3V 64 0
76 UCAC4 345-006842 LM* 05 08 27.2958745944 -21 01 44.375576844   15.940 14.665 14.582   M5 28 0
77 PM J05243-1601 ** 05 24 19.136688 -16 01 15.27024   15.17 13.57 13.29   M4.5 32 0
78 LP 717-36 ** 05 25 41.666208 -09 09 12.47904   14.17 12.57 12.26   M3.5V 40 0
79 V* AB Dor TT* 05 28 44.8712165880 -65 26 55.199147208 8.259 7.856 6.999 6.496 5.993 K0V 983 0
80 SCR J0533-4257 LM* 05 33 28.0374734304 -42 57 20.547739296           M4.5 21 0
81 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1558 1
82 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1800 1
83 V* AP Col Er* 06 04 52.1486600471 -34 33 35.774443549     12.96 11.49 9.60 M5 67 0
84 2MASS J06061342-0337082 PM* 06 06 13.4430502440 -03 37 08.143606128           M2.5 4 0
85 2MASS J06161032-1320422 LM* 06 16 10.3260683472 -13 20 42.318278160           M4 12 0
86 WT 1498 LM* 06 22 41.3474765472 -27 37 52.908756888   15.0 13.558     M3.5 11 0
87 UCAC4 209-008264 Er* 06 25 36.0320153856 -48 15 59.725680372   14.481 12.933 12.444   M2.5 8 0
88 EUVE J0625-60.0 PM* 06 25 56.0925347184 -60 03 27.042176160   13.87 12.319 11.99 9.562 M5Ve 35 0
89 PM J06528-0524 PM* 06 52 53.9183020800 -05 24 41.376264516   13.765 12.247 11.879   K7V 11 0
90 UCAC4 349-019661 ** 06 58 39.820752 -20 21 52.46928   15.39 13.68 13.28   M4 6 0
91 2MASS J07020886-0626206 PM* 07 02 08.8706934576 -06 26 20.689312308           M2 2 0
92 1RXS J070659.0-535347 LM* 07 06 57.7271262144 -53 53 46.351741452   12.78 11.42 11.09 9.598 M0 18 0
93 2MASS J07102991-1637350 * 07 10 29.9192001720 -16 37 35.272670232           M2.5 3 0
94 GSC 08558-01964 ** 07 10 59.922936 -56 32 59.68608   14.456 13.005 12.708   M1.5 10 0
95 2MASS J07120447-3048526 * 07 12 04.4607319992 -30 48 52.444822068           M2.5 3 0
96 HD 56875 * 07 17 46.9821290328 -25 59 08.424912192   8.25 7.83     F3V 23 0
97 2MASS J07174710-2558554 Y*? 07 17 47.1032769768 -25 58 55.417216692     13.5     M2 5 0
98 CD-29 4446 Ro* 07 28 51.37140 -30 14 48.5428 12.47 11.60 10.08 9.83 7.885 M1Ve 73 0
99 L 186-67 LM* 08 22 47.4121938277 -57 26 52.937315248   14.4   12.98 10.28 M4.5 30 0
100 L 186-66 PM* 08 22 47.8726935594 -57 26 45.120598444       16.24 12.25 ~ 9 0
101 NGC 2632 OpC 08 40 13 +19 37.3           ~ 1421 0
102 PM J19428-4406 LM* 19 42 53.2607838120 -44 06 27.943508520   14.883 13.350 13.130   M3.5 10 0
103 RX J1943.4-3722 LM* 19 43 24.6866450904 -37 22 10.997291136   15.23 13.67 13.42 10.72 M3.5 11 0
104 PM J19515-3510 ** 19 51 35.87880 -35 10 37.5780     13.070 12.558   M4 13 0
105 SCR J2010-2801 SB* 20 10 00.037 -28 01 41.04   14.49 12.99 12.52 10.09 M3.0Ve 36 0
106 LEHPM 2-783 PM* 20 19 49.8113477751 -58 16 42.981694709     17.17 15.28 13.03 M6 12 0
107 2MASS J20500010-1154092 PM* 20 50 00.1102799424 -11 54 09.330116076       12.99   M3.5 5 0
108 ASAS J210108-4158.9 Ro* 21 01 07.9341520800 -41 58 53.641651188   13.226 11.950 11.420 10.081 M0 9 0
109 1RXS J210736.5-130500 PM* 21 07 36.7905249432 -13 04 58.191351204   14.229 12.640 12.349   M3.0Ve 23 0
110 2MASS J21103096-2710513 PM* 21 10 30.9703033872 -27 10 51.526571844           M5 14 0
111 ** BRG 32A PM* 21 10 31.4809619232 -27 10 58.013277492           M4.5 18 0
112 2MASS J21235271-3908176 PM* 21 23 52.7170984224 -39 08 17.600445744           M3.5 5 0
113 2MASS J21505366-0553186 * 21 50 53.6698757328 -05 53 18.611633940           M1 5 0
114 WG 39 WD* 21 57 38.3567715267 -51 00 31.521044535   14.94 14.73 14.53   DQ7 70 0
115 CD-51 13128 Er* 21 57 41.2035635911 -51 00 22.237732006 12.968 12.008 10.487 9.416 8.101 M2Ve 83 0
116 WT 2221 LM* 22 11 42.0984095496 -20 44 18.280756032   14.5 13.763 12.1 10.4 M3.5V 12 0
117 Wolf 1561 B PM* 22 17 18.6983381066 -08 48 19.329553621       14.26 11.2 M5V 57 0
118 Wolf 1561 A Er* 22 17 18.9728566600 -08 48 12.321642187       13.32 10.57 M4V 88 0
119 UCAC4 372-179561 PM* 22 17 43.1646077088 -15 46 45.279079860   16.748 15.193 14.974   M4 6 0
120 2MASS J22184009-5326405 Er* 22 18 40.1000851440 -53 26 40.664473260           M2.5 10 0
121 L 788-34 Er* 22 23 06.9968051575 -17 36 26.333040286   15.09 13.30 11.87 10.04 M4.5Ve 86 0
122 StKM 1-2018 ** 22 33 22.6593 -09 36 53.737   13.98 12.41 12.10 10.07 M3e 44 0
123 L 119-21 ** 22 38 29.75656 -65 22 42.6660 14.218 13.05 11.446 10.267 8.744 M3Ve 66 1
124 PM J22403-4931A PM* 22 40 18.6851722038 -49 31 04.482687182   16.19 14.40 14.945   M5.5 6 0
125 PM J22403-4931B PM* 22 40 18.9639887958 -49 31 01.224464259       15.167 10.7 ~ 3 0
126 HD 218860 PM* 23 11 52.0534851600 -45 08 10.631426784   9.52 8.782   7.930 G8V 65 0
127 CD-45 14955B LM* 23 11 53.6378755512 -45 08 00.447085752   21.46 13.00 13.34 11.54 M3Ve 11 0
128 1RXS J231318.1-493322 PM* 23 13 16.7064800688 -49 33 15.479769852   15.83 14.24 13.85 11.366 M3Ve 18 0
129 PM J23261-7323 Er* 23 26 10.6969614264 -73 23 49.853758488   14.08 11.877 11.492 9.951 M0Ve 44 0
130 ASAS J232857-6802.4 Er* 23 28 57.6376130976 -68 02 34.024508916   14.51 13.04 12.59 10.624 M2.5Ve 27 0
131 V* AF Psc Er* 23 31 44.9255654328 -02 44 39.537845376   15.7 14.43 13.3   M4.5 54 0
132 LP 1035-27 Er* 23 32 00.1839220512 -39 17 37.172977584   14.45 12.92 12.663 10.28 M3.0Ve 24 0
133 BPM 82931 Er* 23 32 30.8611320024 -12 15 51.462942408   12.38 10.639 10.320 8.646 M0Ve 65 0
134 BD-17 6768 LM* 23 32 46.80410 -16 45 07.2407 12.81 11.86 10.38   8.020 M3Ve 73 0
135 HD 221503 PM* 23 32 49.3982384497 -16 50 44.320925056 11.116 9.903 8.607 7.82 7.144 K6V 131 0
136 GR* 232 PM* 23 34 11.0162882544 -15 31 01.134131268   13.387 12.004 11.698 10.107 M0 12 0
137 2MASS J23452225-7126505 PM* 23 45 22.2637033488 -71 26 50.482092408           M3.5 12 0
138 ASAS J234747-6517.4 Er* 23 47 46.9572043080 -65 17 24.783508248   13.917 12.453 12.110 10.273 M1.5 22 0
139 G 275-106 SB* 23 48 36.0554902893 -27 39 38.928690183   13.948 12.34 11.25 9.88 M2.5 40 0
140 L 85-31 Er* 23 53 25.2234576038 -70 56 41.148370334     12.999 12.689 10.336 M3.5 26 0
141 HD 223913 PM* 23 53 39.8793669576 -65 56 49.686492768   7.23 6.65     G0V 35 0
142 CPD-66 3810B LM* 23 53 41.7257649864 -65 56 54.336129900     12.5     M1V 6 0
143 G 158-8 PM* 23 55 55.1537377803 -13 21 23.918919162   14.900 13.369 13.100 10.574 M3.5V 25 0
144 LP 704-14 Er* 23 57 19.3590163056 -12 58 40.731265020   14.599 12.998 12.731 10.41 M3 34 1
145 LP 704-15 ** 23 57 20.5800973176 -12 58 48.849843288   14.609 13.018 12.818 10.12 M4+M8 37 1
146 G 273-191 ** 23 58 13.696536 -17 24 33.77412   13.51 12.009 11.519 9.593 M1Ve 29 0

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2022.10.07-08:57:03

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