2012ApJ...760..152L


Query : 2012ApJ...760..152L

2012ApJ...760..152L - Astrophys. J., 760, 152 (2012/December-1)

New M, l, and T dwarf companions to nearby stars from the wide-field infrared survey explorer.

LUHMAN K.L., LOUTREL N.P., McCURDY N.S., MACE G.N., MELSO N.D., STAR K.M., YOUNG M.D., TERRIEN R.C., McLEAN I.S., KIRKPATRICK J.D. and RHODE K.L.

Abstract (from CDS):

We present 11 candidate late-type companions to nearby stars identified with data from the Wide-field Infrared Survey Explorer (WISE) and the Two Micron All Sky Survey (2MASS). Eight of the candidates are likely to be companions based on their common proper motions with the primaries. The remaining three objects are rejected as companions, one of which is a free-floating T7 dwarf. Spectral types are available for five of the companions, which consist of M2V, M8.5V, L5, T8, and T8. Based on their photometry, the unclassified companions are probably two mid-M dwarfs and one late-M/early-L dwarf. One of the T8 companions, WISE J142320.84+011638.0, has already been reported by Pinfield and coworkers. The other T8 companion, ULAS J095047.28+011734.3, was discovered by Burningham and coworkers through the United Kingdom Infrared Telescope Infrared Deep Sky Survey, but its companionship has not been previously recognized in the literature. The L5 companion, 2MASS J17430860+8526594, is a new member of a class of L dwarfs that exhibit unusually blue near-IR colors. Among the possible mechanisms that have been previously proposed for the peculiar colors of these L dwarfs, low metallicity does not appear to be a viable explanation for 2MASS J17430860+8526594 since our spectrum of the primary suggests that its metallicity is not significantly subsolar.

Abstract Copyright:

Journal keyword(s): binaries: visual - brown dwarfs - infrared: stars - proper motions - stars: low-mass

Simbad objects: 34

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Number of rows : 34
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LSPM J0318+0827N PM* 03 18 38.5730329277 +08 27 12.572694275           ~ 2 0
2 G 79-25 PM* 03 18 38.586000 +08 27 06.53616   14.28 12.79 12.62   M3V 10 0
3 2MASS J03184214+0828002 PM* 03 18 42.14256 +08 28 00.2460           M7.0 4 0
4 LP 412-31 LM* 03 20 59.7107396327 +18 54 22.772041176   20.5 18.881 16.904 14.484 M8V 113 0
5 WISE J041328.73+821854.7 LM* 04 13 29.02800 +82 18 54.6840           ~ 1 0
6 G 222-2 PM* 04 14 01.9512434150 +82 15 36.422064344   16.90 15.22 15.03   M5V 16 0
7 2MASSI J0415195-093506 BD* 04 15 19.54368 -09 35 06.6732           T8.0 151 0
8 2MASSI J0727182+171001 BD* 07 27 18.24600 +17 10 01.2072           T7.0 77 0
9 WISE J095047.32+011733.3 BD* 09 50 47.11535 +01 17 36.4519           T8p 14 1
10 G 48-43 PM* 09 50 49.5918796555 +01 18 13.626655217   15.2 13.88 12.4   M4 17 0
11 LP 315-53 LM* 10 16 34.6688372711 +27 51 48.825074312   19.5 18.946 16.858 14.555 M8V 61 0
12 * Y Vel PM* 10 31 21.8213012849 -53 42 55.737315449   5.39 4.89     F9VFe-0.8CH-0.7 147 0
13 2MASS J10313234-5338010 PM* 10 31 32.3511009899 -53 38 01.017992170           ~ 3 0
14 HD 95735 Er* 11 03 20.1948195942 +35 58 11.576182057 10.030 8.960 7.520 5.99 4.79 M2+V 650 0
15 DENIS J112639.9-500355 BD* 11 26 39.8035292578 -50 03 54.849546892         17.800 L5.5 37 0
16 DENIS J122815.2-154733 BD* 12 28 15.23184 -15 47 34.2312       20.187 18.163 L5.5+L5.5 138 0
17 2MASS J14162408+1348263 BD* 14 16 24.0749913652 +13 48 26.176168678           L5 63 0
18 HD 126053 PM* 14 23 15.2847534665 +01 14 29.641784590 6.98 6.90 6.27 5.71 5.39 G1.5V 374 0
19 ULAS J142320.79+011638.2 BD* 14 23 20.79 +01 16 38.2           T8 21 0
20 CE 455 PM* 14 34 58.1548763865 -23 35 57.518389634           M7 5 0
21 2MASS J14351087-2333025 PM* 14 35 10.8437358536 -23 33 02.559507356           M8V 3 0
22 BD-07 4003 BY* 15 19 26.8271336166 -07 43 20.190958776 13.403 11.76 10.560 9.461 8.911 M3V 562 2
23 * sig Ser PM* 16 22 04.3482463818 +01 01 44.548439598       4.6   A9Ib/II 139 0
24 UCAC3 183-131276 PM* 16 22 06.4471352056 +01 01 15.593505833   13.17 11.93 11.80 10.10 M2V 2 0
25 G 203-50B BD* 17 11 45.6231640985 +40 28 57.853971297           L5 8 0
26 2MASS J17430860+8526594 BD* 17 43 08.4403387842 +85 26 59.613328508           L5 6 0
27 G 259-20 PM* 17 43 09.1740605347 +85 26 29.964901316       11.493   M2.0Ve 18 0
28 WISE J180901.07+383805.4 BD* 18 09 01.07400 +38 38 05.4168           T7.5 6 0
29 HD 166620 PM* 18 09 37.4162810870 +38 27 27.995921559 7.86 7.27 6.40 5.63 5.14 K2V 401 0
30 L 207-33 PM* 18 52 52.3349030552 -57 07 37.338051371   13.59 14.144 11.751 9.81 M2V 31 0
31 2MASS J18525777-5708141 PM* 18 52 57.7787174977 -57 08 13.941332485           ~ 4 0
32 VB 10 Er* 19 16 57.6103282334 +05 09 01.588675251     17.30     M8V 445 1
33 LP 574-21 SB* 20 10 34.4437264688 +06 32 13.908339182   13.36 12.318 11.817 9.451 M4V 29 0
34 2MASS J20103539+0634367 PM* 20 10 35.3890443142 +06 34 36.827367093           M8.5V 5 0

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2021.09.21-06:43:15

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