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