2017MNRAS.467.1126D

Query : 2017MNRAS.467.1126D

2017MNRAS.467.1126D - Mon. Not. R. Astron. Soc., 467, 1126-1139 (2017/May-1)

2MASS 0213+3648 C: a wide T3 benchmark companion to an active, old M dwarf binary.

DEACON N.R., MAGNIER E.A., LIU M.C., SCHLIEDER J.E., ALLER K.M., BEST W.M.J., BOWLER B.P., BURGETT W.S., CHAMBERS K.C., DRAPER P.W., FLEWELLING H., HODAPP K.W., KAISER N., METCALFE N., SWEENEY W.E., WAINSCOAT R.J. and WATERS C.

Abstract (from CDS):

We present the discovery of a 360 au separation T3 companion to the tight (3.1 au) M4.5+M6.5 binary 2MASS J02132062+3648506. This companion was identified using Pan-STARRS 1 data and despite its relative proximity to the Sun (22.2–4.0+6.4 pc; Pan-STARRS 1 parallax) and brightness (J = 15.3), it appears to have been missed by previous studies due to its position near a diffraction spike in 2MASS. The close M dwarf binary has active X-ray and Hα emission and shows evidence for UV flares. The binary's weak GALEX UV emission and strong Na I 8200 Å Na absorption lead us to an age range of ∼1-10 Gyr. Applying this age range to evolutionary models implies that the wide companion has a mass of 0.063 ± 0.009 M☉. 2MASS J0213+3648 C provides a relatively old benchmark close to the L/T transition and acts as a key, older comparison to the much younger early-T companions HN Peg B and GU Psc b.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

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

CDS comments: 2MASS 0213+3648 C is 2MASSW J0213198+364837 in Simbad.

Simbad objects: 27

goto Full paper

goto View the references in ADS

Number of rows : 27
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 V* GU Psc B BD* 01 12 36.53808 +17 04 29.9424           T2+T8 81 1
3 PM J02133+3648C BD* 02 13 19.887624 +36 48 38.31156           T3 9 0
4 PM J02133+3648 ** 02 13 20.5910207915 +36 48 50.536769895     14.128 13.811   M4.5V 36 0
5 HD 19600 PM* 03 10 08.8395959400 +27 49 11.157358944   6.427 6.412     A0V 63 0
6 HD 22859 * 03 41 43.3548736272 +37 35 13.757577396   7.85 7.80     A0V 31 0
7 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
8 HD 26794 PM* 04 14 30.2993352984 +03 01 19.389478656   9.78   8.2   K3V 87 0
9 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
10 * 32 Ori ** 05 30 47.05091 +05 56 53.2925 3.51 4.07 4.20 4.26 4.40 B5IV+B7V 205 0
11 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 540 0
12 NAME UMa Region reg 11 00 +50.0           ~ 333 0
13 * ksi UMa C BD* 11 18 38.70096 +31 25 37.9200           T8.5 23 2
14 2MASS J12060248+2813293 BD* 12 06 02.48952 +28 13 29.3160           T2.0+T4.5 21 0
15 2MASS J12095613-1004008 BD* 12 09 56.13096 -10 04 00.8076           T2+T7.5 67 0
16 BD+13 2618C BD* 13 00 42.0799 +12 21 14.800         23.28 T8.5p 153 0
17 CD-45 9206 PM* 14 29 18.5643592920 -46 27 49.737783060 13.059 11.798 10.376 9.492 8.637 K7Vk 77 1
18 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
19 GJ 570 D BD* 14 57 14.96256 -21 21 47.7504           T8 242 1
20 Wolf 1130 B BD* 20 05 21.77853 +54 24 43.2739           T8p 45 0
21 V* HN Peg B BD* 21 44 28.47168 +14 46 07.7988           T2.5 143 0
22 UCAC3 166-320670 ** 22 59 34.859880 -07 04 46.84224       15.163 12.58 M4-5 5 0
23 V* BR Psc BY* 23 49 12.5250852078 +02 24 04.405476893 11.532 10.427 8.993 8.029 6.946 dM1 370 0
24 NAME Pleiades Moving Group MGr ~ ~           ~ 297 0
25 NAME Octans Association As* ~ ~           ~ 101 0
26 NAME Carina-near Moving Group MGr ~ ~           ~ 118 0
27 NAME Hercules-Lyra Moving Group MGr ~ ~           ~ 68 0

To bookmark this query, right click on this link: simbad:objects in 2017MNRAS.467.1126D and select 'bookmark this link' or equivalent in the popup menu