Very Low Mass Binaries Archive

This page last updated on Friday, August 18, 2006.

This Archive contains an uptodate list of all the stellar binary systems with total estimated mass < 0.2 M_solar known in the literature. It targets both theorists and observers interested in understanding the empirical data of this subject. In most cases binary parameters are extracted directly from refereed journals referenced in the Table. Additional background information can be found in:

Not Alone: Tracing the Origins of Very Low Mass Stars and Brown Dwarfs Through Multiplicity Studies (Burgasser, A. J., Reid, I. N., Siegler, N., Close, L., Allen, P., Lowrance, P., Gizis, J. 2006, chapter in Protostars and Planets V) (Download in postscript, PDF)

Relevant figures and figure captions: Mass Ratio Distribution, Separation Distribution, Spectral Type Combination Distribution.

Please send suggestions, corrections, and updates to nsiegler at as.arizona.edu. I'm in the process of providing more complete references. If this table has been useful in your research, we suggest an acknowledgment of the form "This publication has made use of the VLM Binaries Archive maintained by Nick Siegler at http://paperclip.as.arizona.edu/~nsiegler/VLM_binaries/.

Table of All Known Very Low Mass Binary Systems (Mtotal < 0.2 Msolar)

To see the description for a column hover the cursor over it, click on the "?" next to the column name, or click on "Column Descriptions" above. Click on a column name to sort by that column.
name [?]rho (AU) [?]rho_error (AU) [?]rho (mas) [?]rho_error (mas) [?]dist (pc) [?]dist_error (pc) [?]plx (Y/N) [?]sma (Y/N) [?]SpT A [?]SpT B [?]SpT region (O/I) [?]resolv. sp. (Y/N) [?]mass A (Msun) [?]mass B (Msun) [?]q [?]P (yr) [?]age (Myr) [?]location [?]bin. ref. [?]SpT ref. [?]dist. ref. [?]comments [?]
Oph162225-2405152424819401012525NNM9M9.5IY0.0130.0070.54376501pOph103104,103105-
2MASSJ1207334-39325441.14.77768536NNM8.5L:IY0.0240.0040.1722508TWA22,632234-
2MASSJ1225543-2739463.80.1282513.40.4YNT6T8IN0.0330.0240.7343-field55,9138-
2MASSJ1534498-2952270.90.165713.60.2YNT5.5T5.5IN0.0350.0351.004-field59038-
2MASSsJ0850359+1057164.7-160-29.62.3YNL6T:ON0.040.030.7539-field77,52,5541,70-
2MASSJ1553022+1532364.20.73495122NNT6.5T7IN0.0400.0350.8844-field697369-
IPMBD297.80.65841343NNL1L4-N0.0450.0380.84106120Pleiades14-47-
epsilonIndiB2.60.073223.60.01YNT1T6IY0.0450.0270.60221300epIndiA161640triple(epsilonIndiA)
2MASSJ0025036+47591910.22.03302316NNL4L4ON0.0480.0470.98149-field878987-
SDSS-J153417.05+161546.14.0-110536-NNT1.5T5.5ON0.050.040.828-field989898-
2MASSJ1101192-773238241.9-1440-16810NNM7M8OY0.0500.0250.50195002ChaI212144,64,65-
2MASSJ0535218-0546080.04---43555NYM6.5M6.5IY0.0540.0340.630.02681Orion858585SB2
CFHT-Pl-128.30.36221343NNM8L4-N0.0540.0380.70111120Pleiades146247-
2MASSJ1146345+2230537.90.2290327.20.6YNL3L4ON0.0550.0551.0094-field7,125241-
Gl337C10.90.75303020.50.4NNL8T:ON0.0550.0551.00152-field3050,6949quadruple(Gl337A
SDSS-J042348.57-041403.52.50.07164215.20.4YNL6.5T2ON0.060.050.7819-field6843,7170-
SDSS-J102109.69-030420.15.00.7172524.56.6YNT1T5IN0.060.050.8448-field697270-
DENIS-PJ1228.2-15476.40.22511020.20.8YYL6L6ON0.0600.0601.0044-field11,947141-
Kelu-15.40.2291218.70.7YNL2L4ON0.0600.0550.9252-field2452,5541-
IPMBD2512.60.59431343NNM7L4-N0.0630.0390.62197120Pleiades14,611447-
2MASSJ0920122+3517421.5-70-20.83.0NNL6.5T:ON0.0680.0681.006-field739,69,877-
2MASSWJ2101154+1756587.80.9234333.23.8YNL7L8ON0.0680.0650.9684-field4,133970-
2MASSJ0004348-4044061.00.3876153YNL4.5L4.5ON0.0680.0681.004-field2535,52,5583triple(GJ1001A)
2MASSJ1728114+3948592.7-131320-NNL7T:ON0.0690.0660.9616-field4,1313,394-
DENIS-PJ020529.0-1159259.20.85104018.00.8YNL7L7ON0.070.071.00105-field125251candidate_triple(DENIS-PJ020529.0-115925BC)
SDSS-J092615.38+584720.92.60.5706387NNT4:T4:IN0.070.060.8717-field697169-
2MASSJ0518599-2828371.80.55112346NNL6:T4:ON0.070.050.7410-field697169-
PPl150.03---1344NYM7M8ON0.0700.0600.860.0159120Pleiades16047SB2
HD130948B2.40.1134517.90.3YNL4L4IY0.0700.0600.8614-field62640triple(HD130948A)
LHS1070B3.40.2446297.40.3YYM8.5M9ON0.0700.0680.9716-field187418,56quadruple(LHS1070A
UScoCTIO-6610.20.27011452NNM6M6ON0.0700.0701.001225UpSco299245-
UScoCTIO-1094.90.33421452NNM6M7.5ON0.0700.0400.57465UpSco299245candidate
2MASSJ1239272+5515374.50.1211321.3-NNL5L5-N0.0710.0711.0035-field4,13394-
2MASSJ0856479+2235183.4-98934.7-NNL5:L8:ON0.0710.0640.9024-field4434candidate
2MASSJ0700366+3157272.10.7170-12.24.0YNL3.5L6:ON0.0710.0600.8512-field874387-
GJ569B0.900.0110319.80.2YYM8.5M9.0IY0.0710.0540.762.4300UrsMajMG2,3,33,757549triple(GJ569A)
DENIS-PJ144137.3-09455914.3-420-347NNL1L1ON0.0720.0721.00201-field4,48,5539,5580triple(G124-62)
2MASSJ0915341+04220410.82.2730214.83.0NNL7L7ON0.0720.0721.00132-field879387-
2MASSJ1112256+3548131.50.370321.74.2YNL4.5L6ON0.0730.0700.967-field43940triple(Gl417A)
2MASSJ2152260+0937576.01.2250224.25.0NNL6:L6:ON0.0750.0751.0056-field879387-
2MASSJ2252107-1730131.90.4140213.63.2NNL6:T2:IN0.0750.0650.8710-field323232-
2MASSWJ1430436+2915412.60.188329.4-NNL2:L3:ON0.0760.0750.9915-field44386-
2MASSWJ1017075+1308393.40.51043335NNL2L2ON0.0760.0761.0023-field44386-
2MASSJ1600054+1708323.5-57360.6-NNL1L3ON0.0780.0750.9623-field4,13394-
SDSS2335583-0013043.5-57362-NNL1:L4:ON0.0790.0740.9424-field4-82-
ChaHa8----16810NNM6.5-ON0.08---2ChaI979721RV
DENIS-PJ100428.3-1146486.80.1146346.8-NNL0:L2:ON0.0800.0760.9563-field444
LSPM1735+26343.20.3290-111NNM9:M9:ON0.0820.0740.920-field999999-
2MASSJ1707234-05582415.22.71010170151NNM9L3IY0.0830.0770.93210-field1026767-
2MASSJ2147436+1431317.0-322321.8-NNL0L2-N0.0840.0780.9365-field4,13424-
DENIS-PJ185950.9-3706327.7-60-12911NNL0L3ON0.0840.0760.90765R-CrA202057-
2MASSJ0147328-4954486.31.2190-336NNM8:L2:ON0.0840.0800.9555-field879387-
2MASSJ1449378+2355378.5-134363.7-NNL0L3ON0.0840.0750.8988-field4,13394-
DENIS-J055146.0-443412.2220.044.322005010020NNM8.5L0IY0.0850.0790.9311500-field272727-
2MASSJ2113029-100941----12.52.5NNM6M6ON0.0850.0851?--field284228SB2
DENIS-PJ035726.9-4417302.2-98322.2-NNM9.5L1.5-Y0.0850.080.9111-field4,13814-
DENIS-J220002.0-303832.938.23109060352NNM8L0OY0.0850.0830.98813-field666666-
2MASSWJ0746425+2000322.5-220-12.20.04YYL0L1.5ON0.0850.0660.7811300?field7,4,1720,39,7141-
2MASSJ1426316+1557014.00.7152626.14.5NNM8.5L1ON0.0880.0760.8627-field174217-
2MASSJ1311391+8032227.71.32676295NNM8.5M9ON0.0890.0870.9872-field174217-
SCR1845-63574.50.03117033.850.02YNM8.5T5.5ON0.090.040.4437-field100101100-
CFHT-Pl-1834.6-330-105-NNM8M8OY0.0900.0901.00679-field4,191919-
LHS2397a3.00.1207714.60.4YNM8L7.50N0.0900.0680.7618-field1042,7836,84-
LP349-251.30.21251010.11.2NNM8M9ON0.0900.0850.944-field314231-
LP475-8558.51.52945295NNM7.5M9.5ON0.0910.0800.8885625Hyades9429-
2MASSJ1127534+7411078.41.52468346NNM8M9ON0.0920.0870.9580-field174217-
2MASSJ2140293+1625184.00.7155525.64.4NNM9L2ON0.0920.0780.8527-field174217-
2MASSJ2206228-2047054.50.8168726.74.5NNM8M8ON0.0920.0910.9931-field174217-
2MASSJ0253202+271333------NNM8M8:ON0.0920.092?1?--field842-SB2
2MASSJ1047138+4026492.80.51228234NNM8L0ON0.0920.0840.9115-field17,535317triple(LP213-67,M6.5)
2MASSJ2331016-04061815.00.4573826.20.6YNM8.5L7ON0.0930.0670.72205-field4,13,174249-
2MASSJ0429184-3123565.81.15312112NNM7.5L1ON0.0940.0790.8448-field23,874323-
LP415-203.60.61198305NNM7M9.5IN0.0950.0790.8322625Hyades9429-
2MASSWJ1750129+4424044.91.01585316NNM7.5L0ON0.0950.0840.8836-field9429-
2MASSJ0952219-192431------NNM7M7:ON0.0980.098?1?--field843-SB2
LHS292------NNM7M7:ON0.0980.098?1?--field876-SB2
2MASSJ1847034+5522431.90.3825234NNM7M7.5ON0.0980.0940.968-field234323-
UScoCTIO-5517.70.312211452NNM5.5M6ON0.1000.0700.702555UpSco299245-
MHO-Tau-86.21.14481423NNM6M6.5ON0.1000.0700.70532Taurus15,4695,466-