2013ApJ...777...36M

Query : 2013ApJ...777...36M

2013ApJ...777...36M - Astrophys. J., 777, 36 (2013/November-1)

The exemplar T8 subdwarf companion of Wolf 1130.

MACE G.N., KIRKPATRICK J.D., CUSHING M.C., GELINO C.R., McLEAN I.S., LOGSDON S.E., WRIGHT E.L., SKRUTSKIE M.F., BEICHMAN C.A., EISENHARDT P.R. and KULAS K.R.

Abstract (from CDS):

We have discovered a wide separation (188.''5) T8 subdwarf companion to the sdM1.5+WD binary Wolf 1130. Companionship of WISE J200520.38+542433.9 is verified through common proper motion over a ∼3 yr baseline. Wolf 1130 is located 15.83±0.96 pc from the Sun, placing the brown dwarf at a projected separation of ∼3000 AU. Near-infrared colors and medium resolution (R ~ 2000-4000) spectroscopy establish the uniqueness of this system as a high-gravity, low-metallicity benchmark. Although there are a number of low-metallicity T dwarfs in the literature, WISE J200520.38+542433.9 has the most extreme inferred metallicity to date with [Fe/H] = -0.64±0.17 based on Wolf 1130. Model comparisons to this exemplar late-type subdwarf support it having an old age, a low metallicity, and a small radius. However, the spectroscopic peculiarities of WISE J200520.38+542433.9 underscore the importance of developing the low-metallicity parameter space of the most current atmospheric models.

Abstract Copyright: ∼

Journal keyword(s): binaries: general - brown dwarfs - stars: individual (Wolf 1130, WISE J200520.38+542433.9) - stars: low-mass

Simbad objects: 51

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Number of rows : 51
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 WISE J000517.48+373720.5 BD* 00 05 16.61400 +37 37 23.2493           T9 20 0
2 ULAS J013939.77+004813.8 BD* 01 39 39.78096 +00 48 13.9248           T7.5(N) 6 0
3 CFBDS J030135-161418 BD* 03 01 35.16768 -16 14 17.8008           T7.0 7 0
4 WISE J032120.91-734758.8 BD* 03 21 20.91528 -73 47 58.8912           T8 7 0
5 WISE J035934.06-540154.6 BD* 03 59 34.24998 -54 01 46.4287           Y0 43 0
6 WISE J041022.71+150248.4 BD* 04 10 22.07612 +15 03 10.9840           Y0 45 0
7 WISE J041358.14-475039.3 BD* 04 13 58.03476 -47 50 42.6935           T9 14 0
8 WISE J045853.89+643452.5 BD* 04 58 53.57916 +64 34 49.5816           T8.5 32 0
9 WISE J054047.00+483232.4 BD* 05 40 46.75303 +48 32 38.5454           T8.5 9 0
10 HD 42581B BD* 06 10 34.80 -21 52 00.0           T6.5 549 0
11 WISEP J062309.94-045624.6 BD* 06 23 09.682704 -04 56 23.52372           T8 19 0
12 WISE J075946.98-490454.0 BD* 07 59 47.37747 -49 04 56.7180           T8 10 0
13 WISE J081117.81-805141.3 BD* 08 11 17.81808 -80 51 41.3856           T9.5: 20 1
14 CFBDS J092250+152741 BD* 09 22 50.12 +15 27 41.4           T7.0 7 0
15 2MASSI J0937347+293142 BD* 09 37 34.87968 +29 31 40.9908           T6 99 1
16 G 48-43B BD* 09 50 47.33040 +01 17 33.0068           T8p 20 1
17 G 48-43 PM* 09 50 49.5920658472 +01 18 13.628490426   15.2 13.88 12.4   dM4.0 27 0
18 ULAS J101721.40+011817.9 BD* 10 17 21.40056 +01 18 17.9280           T8(N) 8 0
19 WISE J104245.23-384238.3 BD* 10 42 45.23088 -38 42 38.3292           T8.5 14 0
20 WISE J113949.24-332425.1 BD* 11 39 49.31953 -33 24 24.8248           T7 5 0
21 WISE J115013.85+630241.5 BD* 11 50 13.23085 +63 02 47.1108           T8 14 0
22 WISE J121756.90+162640.8 BD* 12 17 56.35451 +16 26 53.6955           T9+Y0 51 0
23 BD+13 2618C BD* 13 00 42.0799 +12 21 14.800         23.28 T8.5p 153 0
24 WISE J140518.39+553421.3 BD* 14 05 21.24937 +55 34 18.8785           Y0(pec?) 66 0
25 ULAS J141623.94+134836.3 BD* 14 16 23.94216 +13 48 36.3204           T7.5p 64 0
26 HD 126053B BD* 14 23 20.79 +01 16 38.2           T8 32 0
27 WISE J144806.48-253420.3 BD* 14 48 06.36508 -25 34 12.8176           T8 9 0
28 WISE J152305.10+312537.6 BD* 15 23 05.02140 +31 25 42.8504           T6.5pec 11 0
29 WISE J154151.65-225024.9 BD* 15 41 52.28912 -22 50 24.7060           Y0 59 0
30 WISE J154214.00+223005.2 BD* 15 42 14.71369 +22 30 09.2468           T9.5 17 0
31 WISE J161441.46+173935.5 BD* 16 14 41.07507 +17 39 40.4808           T9 18 0
32 WISE J161705.74+180714.1 BD* 16 17 05.774328 +18 07 14.08440           T8 22 0
33 WISE J173835.53+273259.0 BD* 17 38 35.27114 +27 33 02.3494           Y0 70 0
34 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
35 WISEA J174556.67+645934.1 BD* 17 45 56.65 +64 59 33.8           T7 4 0
36 WISEP J180435.40+311706.1 BD* 18 04 35.56136 +31 17 06.4099           T9.5: 13 0
37 WISE J181210.85+272144.3 BD* 18 12 10.82400 +27 21 44.3376           T8.5: 17 0
38 WISE J182831.08+265037.7 BD* 18 28 30.30897 +26 50 36.0751           Y0 76 0
39 WISE J190903.16-520433.5 BD* 19 09 03.16 -52 04 33.5           T5.5 3 0
40 Wolf 1130 PM* 20 05 02.1950576493 +54 26 03.234326252   11.970 13.883     sdM1 153 0
41 Wolf 1130 B BD* 20 05 21.77853 +54 24 43.2739           T8p 45 0
42 HD 199217 * 20 54 01.4351839440 +48 26 15.132306012   7.66 7.69     A0V 31 0
43 WISE J205628.91+145953.2 BD* 20 56 28.31061 +14 59 47.8010           Y0 58 0
44 HD 199066 ** 21 05 23.4865860336 -81 23 48.490164096   9.00 7.94     K0III 12 0
45 HD 205314 ** 21 32 56.5920346080 +49 58 39.478477980   5.721 5.755     A0V 73 0
46 WISEP J213456.73-713743.6 BD* 21 34 56.73720 -71 37 44.5800           T9pec 14 0
47 Wolf 940 B BD* 21 46 38.4345 -00 10 34.714           T8.5 62 0
48 WISEP J223729.53-061434.2 BD* 22 37 29.547288 -06 14 33.84168           T5 7 0
49 WISEP J232519.54-410534.9 BD* 23 25 19.53840 -41 05 35.0592           T9pec 20 0
50 WISE J233543.79+422255.2 BD* 23 35 43.778880 +42 22 55.13844           T7 8 0
51 2MASSI J2356547-155310 BD* 23 56 54.77040 -15 53 11.1336           T5.8 48 0

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