1997A&A...325..159L

Query : 1997A&A...325..159L

1997A&A...325..159L - Astronomy and Astrophysics, volume 325, 159-166 (1997/9-1)

A search for companions to nearby southern M dwarfs with near-infrared speckle interferometry.

LEINERT C., HENRY T., GLINDEMANN A. and McCARTHY D.W.Jr

Abstract (from CDS):

We searched the 9 M-dwarf primaries nearer than 5pc and south of declination δ=-30o for companions with separations 1-10AU and found none. Taken together with the 25 northern primaries studied by Henry and McCarthy (1990ApJ...350..334H) the fraction of binaries and triples within the now complete sample of all M dwarfs within 5pc is 9/34=26±9%, and the average number of companions per system is 0.32±0.10. This is lower by 2σ than the observed multiplicity fraction of 43±5%, and companions per system of 0.49±0.05 in the sample of nearby solar-type main sequence stars. It is also much lower than the extrapolated binary fraction among young stars in Taurus. We discuss the implications of this finding.

Abstract Copyright: ∼

Journal keyword(s): binaries: general - stars: low-mass - stars: luminosity function, mass function

VizieR on-line data: <Available at CDS (J/A+A/325/159): table1 table2 table3 tables.tex>

Simbad objects: 42

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Number of rows : 42
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 HD 225213 Er* 00 05 24.4284351777 -37 21 26.507931505 11.074 10.022 8.562 7.589 6.432 M2V 206 0
2 G 158-27 PM* 00 06 43.1973190107 -07 32 17.019101068     13.837 13.605 10.15 M5.5V 210 0
3 HD 1326 Er* 00 18 22.8849799680 +44 01 22.637951588   10.120   7.3   M2V 542 0
4 HD 1326B Er* 00 18 25.8251408611 +44 01 38.092431857   12.84 11.04 10.3   M3.5V 286 0
5 V* YZ Cet Er* 01 12 30.6368826382 -16 59 56.358011559 15.315 13.885 12.074 10.696 8.938 M4.0Ve 264 0
6 G 272-61B Er* 01 39 01.6377185550 -17 57 01.001240728           M6V 855 0
7 V* TZ Ari Er* 02 00 12.9563198327 +13 03 07.000569241 15.406 14.100 12.298 10.943 9.195 M4.5V 282 0
8 L 372-58 PM* 03 35 59.6991613260 -44 30 45.730830569 16.22 14.98 13.07 11.45 9.47 M5.5V 114 0
9 * omi02 Eri C Er* 04 15 21.5359980886 -07 39 20.694578096   12.85 11.17     M4.5V 220 0
10 HD 33793 PM* 05 11 40.5898395497 -45 01 06.361734876 11.624 10.433 8.853 7.9 6.899 M1VIp 336 0
11 Ross 614 Er* 06 29 23.3915175239 -02 48 48.803911021 13.942 12.764 11.071 9.77 8.05 M4.5V 349 0
12 Ross 614B PM* 06 29 23.52 -02 48 51.1   16 14.23     ~ 98 0
13 BD+05 1668 PM* 07 27 24.4989685603 +05 13 32.841491057 12.558 11.443 9.872 8.699 7.161 M3.5V 418 0
14 G 51-15 Er* 08 29 49.3527921926 +26 46 33.624143059   16.87   14.736   M6.5Ve 295 0
15 V* AD Leo Er* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1340 1
16 L 143-23 PM* 10 44 21.2329114167 -61 12 35.275360415   15.74 13.920 12.33 10.31 M5.5V 65 0
17 LP 731-58 Er* 10 48 12.6142508200 -11 20 09.610693470     15.784 16.01 11.25 M6.5V 174 0
18 Wolf 359 Er* 10 56 28.9208702274 +07 00 53.003285286 16.706 15.541 13.507 11.684 9.507 dM6 721 0
19 HD 95735 Er* 11 03 20.1948195942 +35 58 11.576182057 10.030 8.960 7.520 5.99 4.79 M2+V 715 0
20 BD+44 2051 PM* 11 05 28.5769490063 +43 31 36.386948721 11.440 10.270   7.9   M1.0V 329 0
21 BD+44 2051B Er* 11 05 30.8855820790 +43 31 17.885197587   16.45 14.45 13.4   M6.0V 246 0
22 Ross 128 Er* 11 47 44.3972681420 +00 48 16.400337591 14.223 12.905 11.153 9.859 8.184 dM4 420 0
23 Wolf 424 ** 12 33 17.361480 +09 01 15.79224 15.398 14.313 12.467 10.937 8.988 M5.5V 321 0
24 NAME Proxima Centauri Er* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1299 0
25 BD-12 4523 BY* 16 30 18.0583947383 -12 39 45.321217732 12.829 11.638 10.072 8.917 7.421 M3V 315 0
26 CD-46 11540 LM* 17 28 39.9455781571 -46 53 42.688095874 12.177 10.973 9.407 8.337 7.006 M3V 254 1
27 BD+68 946 PM* 17 36 25.8993094605 +68 20 20.909627174 11.73 10.65   8.3   M3.0V 296 0
28 CD-44 11909 PM* 17 37 03.6654566674 -44 19 09.166492972 13.791 12.593 10.946 9.729 8.145 M3.5 128 0
29 NAME Barnard's star BY* 17 57 48.4984700685 +04 41 36.113879676 12.497 11.24 9.511 8.298 6.741 M4V 812 2
30 HD 173739 PM* 18 42 46.7043860406 +59 37 49.409446059   10.43 8.93     M3V 382 1
31 HD 173740 PM* 18 42 46.8946714770 +59 37 36.721161413   11.32 9.78     M3.5V 338 1
32 CD-23 14742 Er* 18 49 49.3637762005 -23 50 10.447375350 13.528 12.19 10.43 10.23 7.703 M3.5Ve 378 0
33 VB 10 Er* 19 16 57.6109547886 +05 09 01.600923413     17.30     M8V 476 1
34 G 208-44 Er* 19 53 54.4821159649 +44 24 51.341564299   15.31 13.126 13.083 9.78 M5.5Ve 207 1
35 G 208-45 LM* 19 53 55.1405033909 +44 24 54.147256052   15.97 13.99 14.3 10.27 M6V 190 0
36 V* AX Mic Er* 21 17 15.2690680973 -38 52 02.503938581   8.06 6.68     M1V 224 0
37 HD 204961 PM* 21 33 33.9751191976 -49 00 32.399427028 11.359 10.176 8.672 7.665 6.479 M2/3V 290 1
38 HD 239960B Er* 22 27 59.7956021455 +57 41 49.746752678           M4V 172 0
39 V* EZ Aqr Er* 22 38 33.576000 -15 17 59.75700 15.762 14.33 12.38 12.12 8.677 M5V 304 1
40 BD-15 6290 BY* 22 53 16.7325836486 -14 15 49.304052185 12.928 11.749 10.192 9.013 7.462 M3.5V 1013 1
41 HD 217987 PM* 23 05 52.0357857091 -35 51 11.055185039   8.83 7.39     M2V 273 0
42 Ross 248 BY* 23 41 55.0363002516 +44 10 38.818911116   14.19   11.1   M5.0V 315 0

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