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Home All issues Volume 520 (September-October 2010) A&A, 520 (2010) A54 Full HTML
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Table 2:

Photometric and astrometric properties of the observed binary/multiple M dwarfs.

Primary ID 		$\Delta z^\prime $ $\Delta i^\prime$ $\rho$ $\theta$ Newa $f_{\rm Mult}$b qc
(2MASS)     [ $\hbox{$^{\prime\prime}$ }$] [ $\hbox{$^\circ$ }$] (y/n)    
J00150240-7250326 2.13 $\pm$ 0.18 1.31 $\pm$ 0.14 0.290 $\pm$ 0.009 69.1 $\pm$ 0.3 y y y
J00250428-3646176 2.99 $\pm$ 0.21 2.59 $\pm$ 0.23 0.605 $\pm$ 0.012 242.4 $\pm$ 0.3 y y y
J00503319+2449009 0.79 $\pm$ 0.01 0.94 $\pm$ 0.02 1.305 $\pm$ 0.002 318.9 $\pm$ 0.3 n y y
J01071194-1935359 1.16 $\pm$ 0.05 0.65 $\pm$ 0.03 0.417 $\pm$ 0.001 170.0 $\pm$ 0.3 y y y
J01093874-0710497 1.90 $\pm$ 0.01 2.02 $\pm$ 0.01 2.554 $\pm$ 0.001 74.5 $\pm$ 0.3 n y y
J01132817-3821024 0.37 $\pm$ 0.01 0.22 $\pm$ 0.01 1.405 $\pm$ 0.003 29.0 $\pm$ 0.3 y y y
J01365516-0647379 5.07 $\pm$ 0.01 ... 5.587 $\pm$ 0.004 179.9 $\pm$ 0.3 y y n
J01452133-3957204d 2.00 $\pm$ 0.10 2.39 $\pm$ 0.16 0.943 $\pm$ 0.009 130.9 $\pm$ 0.3 y n n
J01535076-1459503 0.01 $\pm$ 0.01 0.13 $\pm$ 0.01 2.876 $\pm$ 0.001 291.9 $\pm$ 0.3 y y y
J02002975-0239579 0.75 $\pm$ 0.06 0.89 $\pm$ 0.05 0.323 $\pm$ 0.001 5.9 $\pm$ 0.3 y y y
J02133021-4654505 0.73 $\pm$ 0.27 1.45 $\pm$ 0.08 0.135 $\pm$ 0.001 124.9 $\pm$ 0.3 y y y
J02155892-0929121AB 2.62 $\pm$ 0.05 2.80 $\pm$ 0.05 0.631 $\pm$ 0.001 292.2 $\pm$ 0.3 y y y
J02155892-0929121AC 4.99 $\pm$ 0.05 5.52 $\pm$ 0.10 3.509 $\pm$ 0.002 299.3 $\pm$ 0.3 y y y
J02165488-2322133 0.91 $\pm$ 0.01 0.92 $\pm$ 0.01 4.369 $\pm$ 0.001 314.1 $\pm$ 0.3 n y y
J02271603-2929263 1.67 $\pm$ 0.02 1.77 $\pm$ 0.01 1.939 $\pm$ 0.001 236.8 $\pm$ 0.3 y y y
J02335984-1811525 0.29 $\pm$ 0.01 -1.02 $\pm$ 0.05 0.854 $\pm$ 0.001 48.9 $\pm$ 0.3 y y y
J02411909-5725185 1.31 $\pm$ 0.02 1.47 $\pm$ 0.02 1.526 $\pm$ 0.001 287.1 $\pm$ 0.3 y y y
J02451431-4344102 1.12 $\pm$ 0.07 0.87 $\pm$ 0.03 0.257 $\pm$ 0.001 214.6 $\pm$ 0.3 y y y
J02490228-1029220AB 1.33 $\pm$ 0.06 1.42 $\pm$ 0.12 0.481 $\pm$ 0.006 209.5 $\pm$ 0.3 y y y
J02490228-1029220AC 1.39 $\pm$ 0.06 1.49 $\pm$ 0.11 0.622 $\pm$ 0.012 210.7 $\pm$ 0.3 y y y
J03033668-2535329 5.14 $\pm$ 0.06 3.69 $\pm$ 0.16 0.834 $\pm$ 0.005 7.6 $\pm$ 0.3 n y y
J03050976-3725058 0.93 $\pm$ 0.10 0.94 $\pm$ 0.07 0.242 $\pm$ 0.004 53.7 $\pm$ 0.3 y y y
J04071148-2918342d 0.70 $\pm$ 0.05 0.48 $\pm$ 0.20 0.295 $\pm$ 0.001 44.4 $\pm$ 0.3 y n n
J04080543-2731349 1.78 $\pm$ 0.06 1.00 $\pm$ 0.10 0.181 $\pm$ 0.005 218.1 $\pm$ 0.3 y y y
J04132663-0139211 0.95 $\pm$ 0.02 -0.45 $\pm$ 0.03 0.771 $\pm$ 0.001 358.8 $\pm$ 0.3 n y y
J04373746-0229282d,f 1.39 $\pm$ 0.16 2.57 $\pm$ 0.05 0.221 $\pm$ 0.002 20.5 $\pm$ 0.3 n n n
J04441107-7019247 0.79 $\pm$ 0.01 1.09 $\pm$ 0.01 2.654 $\pm$ 0.001 157.5 $\pm$ 0.3 n y y
J05241914-1601153 0.36 $\pm$ 0.03 0.43 $\pm$ 0.01 0.639 $\pm$ 0.001 69.1 $\pm$ 0.3 y y y
J05254166-0909123 0.45 $\pm$ 0.07 0.53 $\pm$ 0.09 0.616 $\pm$ 0.004 58.8 $\pm$ 0.3 n y y
J06161032-1320422 1.94 $\pm$ 0.12 1.40 $\pm$ 0.23 0.194 $\pm$ 0.008 170.6 $\pm$ 0.3 y y y
J06583980-2021526AB 0.25 $\pm$ 0.01 0.33 $\pm$ 0.01 1.420 $\pm$ 0.001 199.0 $\pm$ 0.3 y y y
J06583980-2021526ACe 5.89 $\pm$ 0.02 ... 6.992 $\pm$ 0.002 263.3 $\pm$ 0.3 y n n
J06583980-2021526AD 6.91 $\pm$ 0.03 ... 5.149 $\pm$ 0.001 253.9 $\pm$ 0.3 y y n
J07102991-1637350AB 0.46 $\pm$ 0.09 0.64 $\pm$ 0.05 0.568 $\pm$ 0.001 354.9 $\pm$ 0.3 y y y
J07102991-1637350AC 5.26 $\pm$ 0.46 ... 2.021 $\pm$ 0.008 287.6 $\pm$ 0.3 y y y
J07105990-5632596 1.83 $\pm$ 0.07 4.17 $\pm$ 0.07 1.120 $\pm$ 0.006 309.8 $\pm$ 0.3 y y y
J07174710-2558554f 6.35 $\pm$ 0.04 ... 5.332 $\pm$ 0.002 126.8 $\pm$ 0.3 y n n
J07285137-3014490 1.29 $\pm$ 0.11 1.50 $\pm$ 0.18 0.485 $\pm$ 0.002 169.9 $\pm$ 0.3 n y y
J08224744-5726530AB 4.47 $\pm$ 0.04 5.32 $\pm$ 0.05 0.648 $\pm$ 0.002 128.7 $\pm$ 0.3 y y n
J08224744-5726530ACe 1.83 $\pm$ 0.04 ... 8.429 $\pm$ 0.001 26.1 $\pm$ 0.3 n n n
J19425324-4406278 ... 1.39 $\pm$ 0.11 0.836 $\pm$ 0.002 349.8 $\pm$ 0.3 y y y
J19432464-3722108 2.84 $\pm$ 0.08 2.89 $\pm$ 0.07 1.623 $\pm$ 0.004 303.7 $\pm$ 0.3 y y y
J20100002-2801410 0.80 $\pm$ 0.04 0.75 $\pm$ 0.03 0.615 $\pm$ 0.001 280.4 $\pm$ 0.3 y y y
J20500010-1154092 1.04 $\pm$ 0.22 1.17 $\pm$ 0.20 0.486 $\pm$ 0.046 348.3 $\pm$ 0.3 y y y
J21103147-2710578e 1.07 $\pm$ 0.01 1.20 $\pm$ 0.01 9.501 $\pm$ 0.003 313.2 $\pm$ 0.3 ng n n
J22171899-0848122ABe 0.62 $\pm$ 0.03 0.74 $\pm$ 0.01 7.954 $\pm$ 0.001 213.2 $\pm$ 0.3 n n n
J22171899-0848122ACe 3.77 $\pm$ 0.03 ... 7.794 $\pm$ 0.003 220.1 $\pm$ 0.3 n n n
J22332264-0936537 0.12 $\pm$ 0.01 0.65 $\pm$ 0.05 1.421 $\pm$ 0.028 98.6 $\pm$ 0.3 n y y
J22382974-6522423 0.23 $\pm$ 0.01 0.20 $\pm$ 0.02 0.842 $\pm$ 0.001 155.8 $\pm$ 0.3 n y y
J22401867-4931045 0.14 $\pm$ 0.01 0.16 $\pm$ 0.01 4.039 $\pm$ 0.001 41.0 $\pm$ 0.3 n y y
J23581366-1724338 0.01 $\pm$ 0.01 0.03 $\pm$ 0.01 1.989 $\pm$ 0.001 355.7 $\pm$ 0.3 n y y

Notes. (a) Companion discovered in this survey (y) or previously known (n). (b) Included in multiplicity fraction analysis (y/n). (c) Included in mass-ratio analysis (y/n). (d) The primary star spectral type is earlier than M 0 (see Table 3). The system is therefore not included in the statistical analysis. (e) The survey is not complete for component separations greater than 6 $^{\prime \prime }$ and these stars are therefore not included in the statistical analysis. (f) Our primary star is the secondary star in a known binary system in which the primary star is of spectral type F. The system is therefore not included in the statistical analysis. (g) The companion is the star 2MASS J21103096-2710513. Although the position of the secondary star is previously known, we could find no references to the couple as a common proper motion pair.


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