2018AJ....155..109S

Query : 2018AJ....155..109S

2018AJ....155..109S - Astron. J., 155, 109-109 (2018)

Orbital motion of young binaries in Ophiuchus and Upper Centaurus-Lupus.

SCHAEFER G.H., PRATO L. and SIMON M.

Abstract (from CDS):

We present measurements of the orbital positions and flux ratios of 17 binary and triple systems in the Ophiuchus star-forming region and the Upper Centaurus-Lupus cluster based on adaptive optics imaging at the Keck Observatory. We report the detection of visual companions in MML 50 and MML 53 for the first time, as well as the possible detection of a third component in WSB 21. For six systems in our sample, our measurements provide a second orbital position following their initial discoveries over a decade ago. For eight systems with sufficient orbital coverage, we analyze the range of orbital solutions that fit the data. Ultimately, these observations will help provide the groundwork toward measuring precise masses for these pre-main-sequence stars and understanding the distribution of orbital parameters in young multiple systems.

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

Journal keyword(s): binaries: visual - stars: fundamental parameters - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/AJ/155/109): table1.dat table2.dat table3.dat>

Simbad objects: 32

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Number of rows : 32
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 CD-34 9963 Or* 14 50 25.8136658904 -35 06 48.579544512   11.59 10.671   9.568 K1Ve 24 0
2 CD-35 9931 TT* 14 58 37.6872422736 -35 40 30.394769052   11.92 10.75   9.85 K2.5IV 35 0
3 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
4 WSB 18 TT* 16 24 59.74128 -24 56 00.8340   18.9   15.71 13.78 M2.5-M4.5 42 0
5 2MASS J16251521-2511540 Or* 16 25 15.2132987808 -25 11 54.667244364   17.3       M5 17 0
6 CD-24 12683 TT* 16 25 19.2498737256 -24 26 52.809731340   11.36 10.55   9.05 G9V 52 0
7 ROX 3 Or* 16 25 49.6474658424 -24 51 31.947148440     13.10 12.10 11.13 M0e 59 0
8 EM* SR 5 TT* 16 25 55.8341340336 -23 55 10.314211224   14.0 13.72 12.52 11.51 ~ 19 0
9 BKLT J162601-242945 TT* 16 26 01.6091149584 -24 29 45.046071528       17.22 15.00 M3 22 0
10 DoAr 24 TT* 16 26 17.0743951968 -24 20 21.594730920   16.06 14.21 14.02 11.57 K7.5V 126 1
11 [GY92] 93 TT* 16 26 41.2666088952 -24 40 17.881012092       15.41 13.37 M5 65 0
12 YLW 37 TT* 16 26 46.4288834880 -24 12 00.078675192   17.15   13.90 12.37 G3.5 65 0
13 EM* SR 24B TT* 16 26 58.4361499704 -24 45 32.224542876           M0.5e 97 0
14 EM* SR 24A TT* 16 26 58.5134422944 -24 45 36.722580480       14.15 12.87 K1 118 0
15 EM* SR 24 Y*O 16 26 58.53 -24 45 35.3           K2:e+M0.5e 114 0
16 BKLT J162714-245132 TT* 16 27 14.4890106840 -24 51 33.464339784   18.5 16.44 15.04 13.17 M4.5 41 1
17 BKLT J162715-245137 TT* 16 27 15.1289055168 -24 51 38.814347988   16.9 15.02 13.86 12.38 M2 78 0
18 EM* SR 12 Or* 16 27 19.5054789229 -24 41 40.414828505     13.28 12.15 10.855 M0IVe 193 1
19 NAME SR 12C LM* 16 27 19.6577175120 -24 41 49.239711024           M9.0 61 0
20 Elia 2-36 TT* 16 27 49.8764029464 -24 25 40.232849484       13.69 12.19 A7 75 0
21 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
22 WSB 59 Em* 16 28 09.2208789672 -23 52 20.611193592   16.9       ~ 10 0
23 EM* SR 20 Or* 16 28 32.6876536896 -24 22 45.008526648   16.23   12.59   G7 90 0
24 EM* SR 13 Or* 16 28 45.2768168328 -24 28 18.905579112     13.60 12.40 10.9 M2e 142 0
25 V* V2131 Oph Or* 16 31 15.7445171496 -24 34 02.161097472   12.0 12.05 11.06 10.13 ~ 102 0
26 CD-24 12697A TT* 16 31 20.1191847456 -24 30 05.057116128   11.89 10.93     G5IVe 53 0
27 CD-24 12697 TT* 16 31 20.12 -24 30 05.0           G5IVe+K3(e) 40 0
28 CD-24 12697B TT* 16 31 20.1894501240 -24 30 00.688079088   13.71 12.39     K3e 30 0
29 Haro 1-16 Or* 16 31 33.4634997336 -24 27 37.158728076   14.02 12.80     K3e 266 0
30 DoAr 51 Or* 16 32 11.7949720728 -24 40 21.640407420   13.89 13.65 12.43 11.025 K8IVe 76 0
31 LDN 1689 DNe 16 32 22.5 -24 28 29           ~ 153 0
32 CD-24 12699 TT* 16 32 23.2848524712 -24 40 18.632958168   11.94 10.89 10.43 10.02 K2 17 0

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