Very Low Mass Binaries Archive

This page last updated on Tuesday, July 28, 2009. There are currently 99 VLM binaries listed.

This Archive contains an up-to-date list of all the stellar (and sub-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)

Please send suggestions, corrections, and updates to nicholas.siegler at jpl.nasa.gov. If time, I will link the star names to ADS. If this table has been useful in your research, we suggest an acknowledgment of the form "This publication has made use of the Very-Low-Mass Binaries Archive housed at http://www.vlmbinaries.org and maintained by Nick Siegler, Chris Gelino, and Adam Burgasser."

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 [?]projected sep (AU) [?]projected sep error (AU) [?]angular sep (mas) [?]angular error (mas) [?]dist (pc) [?]dist error (pc) [?]plx (Y/N) [?]sma (Y/N) [?]SpT A [?]SpT B [?]SpT region (O/I) [?]resolv. spectra (Y/N) [?]est mass_A (Msun) [?]est mass_B (Msun) [?]q [?]P (yr) [?]age (Myr) [?]location [?]bin. ref. [?]SpT ref. [?]dist. ref. [?]comments [?]
MOA-2007-BLG-1920.620.220.620.331000400NN----0.060.000010.0002---137--microlensing_detection;planetary_companion
2MASSJ1207334-39325441.14.77768536NNM8.5L:IY0.0240.0040.1722508TWA22,632234-
ChaHa81.30.2--16810NNM6-ON0.10.0190.2015913ChaI97,12312121RV;sep=asini;massB=M2sini
USco-CTIO-1086701746001004502NNM7M9.5IY0.0570.0130.23927005USco12412445-
SCR1845-63574.50.03117033.850.02YNM8.5T6IN0.090.040.4437-field100,118101,118100,119-
2MASSJ1101192-773238241.9-1440-16810NNM7M8OY0.0500.0250.50195002ChaI212144,64,65-
UScoCTIO-1094.90.33421452NNM6M7.5ON0.0700.0400.57465UpSco299245candidate
epsilonIndiB2.60.0173223.60.01YNT1T6IY0.0450.0270.60221300epIndiA161640triple(epsilonIndiA)
CFHT-Tau-1831121621423NNM6M9?ON0.10.060.606102Taurus1401416Needs_pm_confirmation;observed_in_only_one_filter
CFHT-Tau-1782257521423NNM5.5M8?ON0.10.060.6026302Taurus1401416Needs_pm_confirmation;observed_in_only_one_filter
LSR1610-00400.60.28.910.3132.30.1YYM6pecL/TON0.10.060.601.662-field135136135-
IPMBD2512.60.59431343NNM7L4-N0.0630.0390.62197120Pleiades14,611447-
WT4605.91.8511111.63.5NNM6L1ON0.120.0750.6240-field252525-
2MASSJ0535218-0546080.04---43555NYM6.5M6.5IY0.0540.0340.630.02681Orion858585SB2
CFHT-Pl-128.30.36221343NNM8L4-N0.0540.0380.70111120Pleiades146247-
MHO-Tau-86.21.14481423NNM6M6.5ON0.100.0700.70532Taurus4695,466-
UScoCTIO-5517.70.312211452NNM5.5M6ON0.100.0700.702555UpSco299245-
2MASSJ2331016-04061815.00.4573826.20.6YNM8.5L7ON0.0930.0670.72205-field4,13,174249-
2MASSJ1225543-2739463.80.1282513.40.4YNT6T8IN0.0330.0240.7343-field55,9138-
2MASSJ1623361-240221212431696512525NNM5M5.5IN0.0960.0700.7380005Oph106106105
2MASSJ0518599-2828371.80.55112346NNL6:T4:ON0.070.050.7410-field697169-
2MASSsJ0850359+1057164.7-160-29.62.3YNL6T:ON0.040.030.7539-field77,5241,70-
2MASSJ14044941-31593293.10.4133.60.6233NNT1T5ON0.040.030.7532-field133133133-
GJ569B0.900.0110319.80.2YYM9.0M9.0IY0.0710.0540.762.4100?UrsMajMG2,3,33,7575,11549triple(GJ569A);possible_quadruple_system
LHS2397a3.00.1207714.60.4YNM8L7.50N0.0900.0680.7618-field1042,7836,84-
Koenigstuhl-118001707776070232NNM6:M9.5OY0.1030.0790.77170000>1000field111111,112,113111companion:DENIS-PJ0021.0-4244;(possible_triple_system)
SDSS-J042348.57-041403.52.50.07164215.20.4YNL6.5T2ON0.060.050.7819-field6843,7170-
2MASSWJ0746425+2000322.5-220-12.20.04YNL0L1.5ON0.0850.0660.7811300?field7,4,1720,39,71,11541-
2MASSJ03202839-04463588.3-0.33-253NNM8.5T5IN0.0860.0680.790.67>2000field125,134,13913443SB2;projected_and_angular_sep_are_upper_limits
SDSS-J153417.05+161546.14.0-110536-NNT1.5T5.5ON0.050.040.8028-field989898-
LP415-203.60.61198305NNM7M9.5IN0.0950.0790.8322625Hyades9429-
IPMBD297.80.65841343NNL1L4-N0.0450.0380.84106120Pleiades14-47-
SDSS-J102109.69-030420.15.00.7172524.56.6YNT1T5IN0.060.050.8448-field697270-
2MASSJ0429184-3123565.81.15312112NNM7.5L1ON0.0940.0790.8448-field23,874323-
2MASSJ0700366+3157272.10.7170-12.24.0YNL3.5L6:ON0.0710.0600.8512-field874387-
2MASSJ2140293+1625184.00.7155525.64.4NNM9L2ON0.0920.0780.8527-field174217-
2MASSJ1426316+1557014.00.7152626.14.5NNM8L1.5ON0.0880.0760.8627-field1742,11517-
HD130948B2.40.1134517.90.3YNL4L4IY0.0700.0600.8614-field62649triple(HD130948A)
PPl150.03---1344NYM7M8ON0.0700.0600.860.0159120Pleiades16047SB2
CFHT-Tau-732122421423NNM6M7?ON0.070.060.867102Taurus1401416Needs_pm_confirmation;observed_in_only_one_filter
2MASSJ2252107-1730131.90.4140213.63.2NNL6:T2:IN0.0750.0650.8710-field323232-
SDSS-J092615.38+584720.92.60.5706387NNT4:T4:IN0.070.060.8717-field697169-
2MASSJ12583501+40130836700800633805010513NNM6M7IY0.1050.0910.8717520241000-5000field122122122secondary_object_is_2MASSJ12583798+4014017
2MASSJ1553022+1532364.20.73495122NNT6.5T7IN0.0400.0350.8844-field697369-
SDSS-J080531.84+481233.0----14.62.5NNL4.5T5IN0.0780.0690.88--field117117117Binary_inferred_from_spectral_template_modelling
LP475-8558.51.52945295NNM7.5M9.5ON0.0910.0800.8885625Hyades9429-
2MASSWJ1750129+4424044.91.01585316NNM7.5L0ON0.0950.0840.8836-field9429-
HD65216B5.90.41671135.60.9YNM7.5L2.5IN0.0890.0780.8850-field14314349Triple_system_with_HD65216A(G5_planet_host_star)
2MASSJ1622252-2405142435519432212525NNM9M9.5IY0.0170.0150.88200005Oph103,106,110104,103,106105-
2MASSJ1449378+2355378.5-134363.7-NNL0L3ON0.0840.0750.8988-field4,13394-
DENIS-PJ185950.9-3706327.7-60-12911NNL0L3ON0.0840.0760.90765R-CrA202057-
2MASSJ0856479+2235183.4-98934.7-NNL5:L8:ON0.0710.0640.9024-field4434candidate
LSPM1735+26343.20.3290-111NNM9:M9:ON0.0820.0740.9020-field999999-
DENIS-PJ035726.9-4417302.2-98322.2-NNM9L1.5-Y0.0850.080.9111-field4,131154-
2MASSJ1047138+4026492.80.51228234NNM8L0ON0.0920.0840.9115-field17,535317triple(LP213-67;M6.5)
Kelu-15.40.2291218.70.7YNL2L4ON0.0600.0550.9252-field2411,5241-
DENIS-J055146.0-443412.2220.044.322005010020NNM8.5L0IY0.0850.0790.9311500-field272727-
2MASSJ1707234-05582415.22.71010170151NNM9L3IY0.0830.0770.93210-field1026767-
2MASSJ2147436+1431317.0-322321.8-NNL0L2-N0.0840.0780.9365-field4,13424-
2MASSJ1534498-2952272.30.51713413.60.2YYT5T5IN0.0290.0270.94150.8field5,13073,13038-
SDSS2335583-0013043.5-57362-NNL1:L4:ON0.0790.0740.9424-field444-
2MASSJ1520022-44224222211741619-NNL1.5L4.5IY0.0820.0770.94400-field15,10810815,108-
LP349-251.30.21251010.11.2NNM8M9ON0.0900.0850.944-field314231-
2MASSJ22551861-57130561.60.21384111.63.1NNL6L8OY0.0750.0710.957.5-field138138138-
DENIS-PJ100428.3-1146486.80.1146346.8-NNM9.5L0.5ON0.0800.0760.9563-field44,1154-
2MASSJ1127534+7411078.41.52468346NNM8M9ON0.0920.0870.9580-field174217-
2MASSJ0147328-4954486.31.2190-336NNM8:L2:ON0.0840.0800.9555-field879387-
2MASSJ1600054+1708323.5-57360.6-NNL1L3ON0.0780.0750.9623-field4,13394-
2MASSJ1847034+5522431.90.3825234NNM7M7.5ON0.0980.0940.968-field234323-
2MASSJ2132114+1341581.80.3664284NNL5L7.5IN0.0780.0750.9610-field11489,114114-
LHS190140.3275511.01.1NYM6.5M7.5ON0.0850.0820.9620-field25109,2525-
2MASSWJ2101154+1756587.80.9234333.23.8YNL7L8ON0.0680.0650.9684-field4,133970-
2MASSJ1112256+3548131.50.370321.74.2YNL4.5L6ON0.0730.0700.967-field43940triple(Gl417A)
2MASSJ1728114+3948592.7-131320-NNL7T:ON0.0690.0660.9616-field4,1313,394-
2MASSJ0126555-502239510040081860100635NNM6.5M8IY0.0950.0920.971000000200-2000field116,131116116could_be_member_of_TWA
LHS1070B3.40.2446297.40.3YYM8.5M9ON0.0700.0680.9716-field187418,36quadruple(LHS1070AD)
2MASSJ0025036+47591910.22.03302316NNL4L4ON0.0480.0470.98149-field878987-
DENIS-J220002.0-303832.938.23109060352NNM8L0OY0.0850.0830.98813-field666666-
2MASSJ1311391+8032227.71.32676295NNM7.5M8ON0.0890.0870.9872-field1742,11517-
2MASSJ2206228-2047054.50.8168726.74.5NNM8M8ON0.0920.0910.9931-field174217-
2MASSWJ1430436+2915412.60.188329.4-NNL2:L3:ON0.0760.0750.9915-field4434-
2MASSWJ1017075+1308393.40.51043335NNL2L2ON0.0760.0761.0023-field4434-
2MASSJ1239272+5515374.50.1211321.3-NNL5L5-N0.0710.0711.0035-field4,13394-
2MASSJ2152260+0937576.01.2250224.25.0NNL6:L6:ON0.0750.0751.0056-field879387-
2MASSJ0915341+04220410.82.2730214.83.0NNL7L7ON0.0720.0721.00132-field879387-
Gl337C10.90.75303020.50.4NNL8T:ON0.0550.0551.00152-field3050,6949quadruple(Gl337A
UScoCTIO-6610.20.27011452NNM6M6ON0.0700.0701.001225UpSco299245-
DENIS-PJ020529.0-1159259.20.85104018.00.8YNL5L6ON0.070.071.00105-field1252,11541candidate_triple(DENIS-PJ020529.0-115925BC)
DENIS-PJ144137.3-09455914.3-420-347NNL1L1ON0.0720.0721.00201-field4,483980triple(G124-62)
DENIS-PJ1228.2-15476.40.22511020.20.8YYL6L6ON0.0600.0601.0044-field11,947141-
2MASSJ0004348-4044061.00.3876153YNL4.5L4.5ON0.0680.0681.004-field8335,5283triple(GJ1001A)
2MASSJ0920122+3517421.5-70-20.83.0NNL6.5T:ON0.0680.0681.006-field739,69,877-
2MASSJ1146345+2230537.90.2290327.20.6YNL2L2ON0.0550.0551.0094-field7,1252,11541-
CFHT-Pl-1834.6-330-105-NNM8M8OY0.0900.0901.00679-field4,19,10719,10719-
2MASSJ0952219-192431------NNM7M7:ON0.0980.098?1?--field843-SB2
2MASSJ0253202+271333------NNM8M8:ON0.0920.092?1?--field842-SB2
2MASSJ2113029-100941----12.52.5NNM6M6ON0.0850.0851?--field284228SB2