2017AJ....154..195B

Query : 2017AJ....154..195B

2017AJ....154..195B - Astron. J., 154, 195-195 (2017/November-0)

New binaries in the ε Cha association.

BRICENO C. and TOKOVININ A.

Abstract (from CDS):

We present Adaptive Optics-aided speckle observations of 47 young stars in the ε Cha association made at the 4 m Southern Astrophysical Research Telescope in the I-band. We resolved 10 new binary pairs, 5 previously known binaries, and 2 triple systems, also previously known. In the separation range between 4 and 300 au, the 30 association members of spectral types G0 and later host 6 binary companions, leading to the raw companion frequency of 0.010 ± 0.04 per decade of separation, comparable to the main sequence dwarfs in the field. On the other hand, all five massive association members of spectral types A and B have companions in this range. We discuss the newly resolved and known binaries in our sample. Observed motions in the triple system ε Cha, composed of three similar B9V stars, can be described by tentative orbits with periods 13 and ∼900 years and a large mutual inclination.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: close - open clusters and associations: individual: epsilon Cha - stars: pre-main sequence - techniques: high angular resolution - techniques: high angular resolution

VizieR on-line data: <Available at CDS (J/AJ/154/195): table1.dat table2.dat table3.dat>

Simbad objects: 59

goto Full paper

goto View the references in ADS

Number of rows : 59
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 Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
2 CVSO 224 TT* 05 25 46.7561581056 +01 43 30.291265200     17.21 16.19 14.61 M3.5Ve 38 0
3 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
4 V* EG Cha Or* 08 36 56.2143359952 -78 56 45.633633000   11.82 10.457   9.010 K4Ve 110 0
5 Cl Mamajek 1 OpC 08 42 32.9 -78 57 47           ~ 392 0
6 HD 82879 TT* 09 28 21.1218832104 -78 15 35.367616224   9.43 8.99     F6/7IV/V 29 0
7 CPD-68 1388 Or* 10 57 49.3755342696 -69 13 59.950499520   11.34 10.310   9.163 K1V(e) 32 0
8 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
9 V* VW Cha Or* 11 08 01.502064 -77 42 28.87524 13.91 14.165 12.761 12.653 10.69 K7+M0 202 0
10 TYC 9414-191-1 * 11 16 29.0061310032 -78 25 20.837789040   12.38 10.95     K5 8 0
11 IRAS F11171-7919 Y*O 11 18 35.821080 -79 35 54.93624   16.49 15.06 14.99 12.22 M4.75 24 0
12 RX J1123.2-7924 TT* 11 22 55.6421746920 -79 24 44.005377168     13.72     M1.5 20 0
13 HD 99827 TT* 11 25 17.7399826296 -84 57 16.359618801   8.08 7.64     F5V 54 0
14 RX J1137.4-7648 ** 11 37 31.22189 -76 47 59.6308           ~ 5 0
15 TYC 9238-612-1 * 11 41 27.6297472992 -73 47 02.992230888   11.41 10.70     G5 12 0
16 [FLG2003] eps Cha 17 Y*O 11 43 26.6961432072 -78 04 45.492325392         13.33 M5 28 0
17 UPM J1147-7841 Y*? 11 47 48.1103065920 -78 41 52.569819852   15.095 13.552     M3.5 14 0
18 V* DZ Cha TT* 11 49 31.8528592968 -78 51 01.062617652   14.330 12.766 12.511 10.732 M0Ve 82 0
19 RX J1150.4-7704 TT* 11 50 28.2998335776 -77 04 38.269946136     12.0   10.54 K4 24 0
20 RX J1150.9-7411 TT* 11 50 44.9860743984 -74 11 13.549913556   16.10 14.63 14.28 11.84 M3.7 19 0
21 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 887 0
22 NAME T Cha B TT* 11 55 04.8297332016 -79 19 11.049917520       16.59 13.26 M3 21 0
23 V* T Cha Or* 11 57 13.5245085552 -79 21 31.530508884   10.00 11.86     K0e 304 1
24 [FLG2003] eps Cha 20 TT* 11 58 26.8127478312 -77 54 45.267517728   15.85 14.29     M3Ve 25 0
25 V* DW Cha Or* 11 58 28.1662230312 -77 54 29.563860420   11.63 10.502   9.011 K4Ve 49 1
26 V* EE Cha dS* 11 58 35.2393350552 -77 49 31.497986964   6.918 6.738     A7V 64 0
27 2MASS J11590798-7812322 Y*? 11 59 07.9835416920 -78 12 32.032523412           M4.75 14 0
28 HD 104123 * 11 59 28.1109495576 -50 30 11.133273816   9.79 8.30     K4/5III 12 0
29 * eps Cha ** 11 59 37.57634 -78 13 18.6179           B9V(n) 111 0
30 RX J1159.7-7601 TT* 11 59 42.2711847672 -76 01 26.178271284   12.46 11.11   9.858 K4Ve 71 0
31 NAME eps Cha Association OpC 11 59 51 -78 12.4           ~ 188 0
32 [FLG2003] eps Cha 3 NIR 12 00 03.70 -78 11 31.0           ~ 15 0
33 V* DX Cha Ae* 12 00 05.0868602544 -78 11 34.565724312   6.81 6.60     A4V 365 0
34 [FLG2003] eps Cha 6 Or* 12 00 08.2609508424 -78 11 39.367837392           M3.5 21 0
35 [FLG2003] eps Cha 7 Or* 12 00 09.3128921712 -78 11 42.320917104           K3IV 28 0
36 [FLG2003] eps Cha 10 Y*? 12 00 55.1840915304 -78 20 29.422817088           M5.75 15 0
37 HD 104467 TT* 12 01 39.1168325928 -78 59 16.915311240   9.26 8.466   7.678 G3V(e) 62 0
38 [FLG2003] eps Cha 8 Y*? 12 01 44.4344494992 -78 19 26.564389392           M5 16 0
39 [FLG2003] eps Cha 9 Y*? 12 01 52.5600965736 -78 18 41.204115540           M4.75 13 0
40 RX J1202.1-7853 TT* 12 02 03.7125300480 -78 53 01.320796464     12.450   10.49 M0e 32 0
41 RX J1202.8-7718 TT* 12 02 54.6320153808 -77 18 38.075876532     14.483   12.081 M3.5 27 0
42 RX J1204.6-7731 TT* 12 04 36.1405166328 -77 31 34.731426468     13.873   11.297 M3 39 0
43 CD-78 487 SB* 12 04 57.4385144088 -79 32 04.729408044   10.95 10.32     F0 7 0
44 V* EF Cha dS* 12 07 05.5212746160 -78 44 28.014866520   7.74 7.46     A9III/IV 54 0
45 [FLG2003] eps Cha 12 PM* 12 07 45.9746836872 -78 16 06.457285452           M3.75 14 0
46 RX J1207.7-7953 TT* 12 07 48.2795515656 -79 52 42.373806168     14.455   11.943 ~ 22 0
47 HD 105515 Pu* 12 09 07.6947957504 -78 46 52.728075480   7.08 6.85     A6III/IV 32 0
48 HD 105923 Or* 12 11 38.1470604024 -71 10 36.027201000   9.86 9.140   8.286 G8V 36 0
49 RX J1216.8-7753 TT* 12 16 45.9354065016 -77 53 33.462798648     13.851   11.568 M3 32 0
50 RX J1219.7-7404 TT* 12 19 43.7030774208 -74 03 57.254127300     13.1   10.95 M1 40 0
51 RX J1220.4-7407 TT* 12 20 21.7911659448 -74 07 39.516658140     12.780   10.52 M1V 42 0
52 ASAS J122105-7116.9 LM* 12 21 04.9986446544 -71 16 49.276835688   13.05 11.73 11.32 10.08 K7V 30 0
53 CD-74 712 TT* 12 39 21.2761289184 -75 02 39.186556764   11.15 10.303   9.197 K3Ve 52 0
54 RX J1243.1-7458 TT* 12 42 53.3342783088 -74 58 47.966310264   16.37 14.81 14.51 12.36 M3e 13 1
55 NAME Cha II MoC 12 54 -77.2           ~ 361 0
56 RX J1256.1-6926 Or* 12 56 08.3082110592 -69 26 54.060882900   12.80 11.831   10.048 K7Ve 19 0
57 CD-69 1055 Or* 12 58 25.5840183960 -70 28 49.148391324   10.77 9.992   8.941 K0Ve 50 0
58 V* CM Cha TT* 13 02 13.5244979592 -76 37 57.818696016   14.70 13.40     K7IVe 49 0
59 CPD-68 1894 TT* 13 22 07.5421944624 -69 38 12.219391716   11.38 10.393   9.117 K1Ve 203 0

To bookmark this query, right click on this link: simbad:objects in 2017AJ....154..195B and select 'bookmark this link' or equivalent in the popup menu