2018ApJ...852...55D

Query : 2018ApJ...852...55D

2018ApJ...852...55D - Astrophys. J., 852, 55-55 (2018/January-1)

Banyan. X. Discovery of a wide, low-gravity L-type companion to a fast-rotating M3 dwarf.

DESROCHERS M.-E., ARTIGAU E., GAGNE J., DOYON R., MALO L., FAHERTY J.K. and LAFRENIERE D.

Abstract (from CDS):

We report the discovery of a substellar-mass co-moving companion to 2MASS J22501512+2325342, an M3 candidate member of the young (130-200 Myr) AB Doradus Moving Group (ABDMG). This L3 β companion was discovered in a 2MASS search for companions at separations of 3''-18'' from a list of 2812 stars suspected to be young (≲500 Myr) in the literature, and was confirmed with follow-up astrometry and spectroscopy. Evolutionary models yield a companion mass of 30–4+11MJup at the age of ABDMG. The 2MASS J22501512+2325342 AB system appears to be a spatial outlier to the bulk of ABDMG members, similarly to the young 2MASS J22362452+4751425 AB system. Future searches for young objects around these two systems would make it possible to determine whether they are part of a spatial extension of the known ABDMG distribution.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: spectroscopic - brown dwarfs - stars: late-type - stars: low-mass - stars: low-mass

Simbad objects: 37

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Number of rows : 37
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 NAME THA MGr 00 00 -62.0           ~ 540 0
2 SCR J0103-5515C LM* 01 03 35.58 -55 15 54.6           ~ 64 0
3 V* GU Psc RS* 01 12 35.0523595128 +17 03 55.571917320   15.59 14.10 13.78   M3 50 0
4 2MASS J02192210-3925225 ** 02 19 22.1103954432 -39 25 22.539937296   18.5   15.5 13.42 M6+L4 36 0
5 PM J03368-2418E ** 03 36 48.96168 -24 18 01.1844       13.563   M3 4 0
6 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
7 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
8 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
9 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
10 NAME Columba Association As* 06 04 19.4 -22 20 40           ~ 337 0
11 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 540 0
12 Cl Mamajek 1 OpC 08 42 32.9 -78 57 47           ~ 392 0
13 LP 261-75 B BD* 09 51 05.49288 +35 58 02.1288           L6V 71 0
14 G 196-3B BD* 10 04 20.6391105792 +50 22 59.378638152           L3beta 115 0
15 NAME UMa Region reg 11 00 +50.0           ~ 333 0
16 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
17 NAME eps Cha Association OpC 11 59 51 -78 12.4           ~ 188 0
18 TWA 27 LM* 12 07 33.4675524840 -39 32 54.016625184     19.95 17.99 15.88 M8IVe 376 0
19 TWA 27B BD* 12 07 33.50 -39 32 54.4           L3 321 0
20 HD 105782 * 12 10 40.2822742584 -37 23 12.779301480   10.09 9.97     A0V 6 0
21 PM J12195+0154 PM* 12 19 33.1537053744 +01 54 26.796848796     14.8     dM4.5 9 0
22 SIPS J1256-1257B BD* 12 56 01.83264 -12 57 27.6912           L7 154 0
23 SIPS J1256-1257 LM* 12 56 02.1337046541 -12 57 21.924307013     17.759   13.318 M7.0 75 0
24 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
25 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
26 PM J22364+4751 PM* 22 36 24.5258223768 +47 51 42.530986512     12.8 12.046   ~ 24 0
27 PM J22364+4751B BD* 22 36 24.75 +47 51 39.7           Lpec 17 0
28 HD 215690 * 22 46 44.9761107072 +25 48 12.125316672   8.03 7.96     A0 16 0
29 [SLS2012] PYC J22502+2325 PM* 22 50 15.1389386688 +23 25 34.255229232     14.9     ~ 9 0
30 2MASS J23225299-6151275 BD* 23 22 53.0081802408 -61 51 27.526074804           L2gamma 30 0
31 NAME Carina Association As* ~ ~           ~ 188 1
32 NAME Octans Association As* ~ ~           ~ 101 0
33 NAME Carina-near Moving Group MGr ~ ~           ~ 118 0
34 NAME Octans-near MGr ~ ~           ~ 29 0
35 NAME Argus Association As* ~ ~           ~ 266 0
36 NAME Hercules-Lyra Moving Group MGr ~ ~           ~ 68 0
37 NAME IC 2391 Supercluster MGr ~ ~           ~ 20 0

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