2003A&A...410..269M


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.19CET15:09:22

2003A&A...410..269M - Astronomy and Astrophysics, volume 410, 269-282 (2003/10-4)

The short period multiplicity among T Tauri stars.

MELO C.H.F.

Abstract (from CDS):

We present the results of high-resolution spectroscopic observations carried out over three years aimed at estimating the short-period (Porb<100days) binary frequency of a sample of T Tauri stars in Oph-Sco, Cha, Lup, CrA star forming regions (SFRs), already observed with high angular resolution techniques by Ghez et al. (1993AJ....106.2005G) and by Ghez et al. (1997ApJ...481..378G) to detect wider components. When combining all four SFRs, the short-period binary frequency is indistinguishable from that found by Duquennoy & Mayor (1991A&A...248..485D) for the solar-type field stars which is also consistent with the previous result obtained by Mathieu (1992, IAU Colloq., 135, 30 and 1994ARA&A..32..465M). When Oph-Sco is analyzed separately, it seems that there is an excess of short-period binaries of a factor 2-2.5. On the contrary, short-period binary systems seem to be absent in the sample containing stars in Cha/Lup/CrA. Such a trend was equally found by Mathieu (1992, IAU Colloq., 135, 30) in Taurus. An excess of spectroscopic systems among the components of visual multiple systems is also observed.

Abstract Copyright:

Journal keyword(s): stars: binaries: close - stars: formation

CDS comments: Table 1 : NTTS 160815-1857 = NTTS 160814-1857.

Simbad objects: 99

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Number of rows : 99

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* SZ Cha Or* 10 58 16.7496916561 -77 17 17.183339177     12.68   10.62 K0e 106 0
2 Hen 3-545 Or* 10 59 06.9712894449 -77 01 40.309036535   12.91 11.136   9.596 K4Ve 193 0
3 V* CS Cha Or* 11 02 24.8849252208 -77 33 35.683462615   12.88 11.69   10.123 K2Ve 201 0
4 V* CT Cha Or* 11 04 09.0989057683 -76 27 19.326914289   13.44 13.00   10.89 K7Ve 112 0
5 Ass Cha T 2-21 TT* 11 06 15.3485848381 -77 21 56.737939872   12.58 11.01   9.35 G5Ve 123 0
6 NAME Cha I MoC 11 06 48 -77 18.0           ~ 1001 1
7 V* DI Cha Or* 11 07 20.7272524388 -77 38 07.303742740   12.02 10.74 10.72   G2Ve 148 0
8 Ass Cha T 1-15 Or* 11 07 43.6609031154 -77 39 41.135416457   17.05 15.34   12.67 K5Ve 68 0
9 Ass Cha T 1-16 Or* 11 07 57.9375088232 -77 38 44.978809368   15.1 14.2   13.04 K4-7 62 0
10 V* VW Cha Or* 11 08 01.3974165580 -77 42 28.579297348 13.91 14.04 12.80   10.69 K7+M0 169 0
11 HD 97048 Ae* 11 08 03.3105687971 -77 39 17.491180130 9.03 8.76 9.00   8.64 A0Vep 466 0
12 V* HP Cha Or* 11 08 15.216432 -77 33 53.17020   14.33 12.77 12.11   K3+G5e 101 0
13 V* HP Cha A * 11 08 15.4942983813 -77 33 53.454218639           K6e 81 0
14 NAME Cha IR Nebula TT* 11 08 38.702 -77 43 51.54           M5.5 72 0
15 V* VZ Cha Or* 11 09 23.7736314968 -76 23 20.855918834   13.82 12.94   12.14 K7e 128 0
16 HD 97300 Ae* 11 09 50.0178181814 -76 36 47.711452436   9.41 9.20   8.82 B9V 160 1
17 Ass Cha T 1-23 Or* 11 09 53.4191770981 -76 34 25.652662545   13.9 19.50 15.10 13.52 G9IIIe 81 0
18 V* WX Cha Or* 11 09 58.666944 -77 37 09.03432   14.93 13.85 14.23 12.20 M1+M5 91 0
19 V* WW Cha Or* 11 10 00.0791962314 -76 34 57.971855660   14.74 14.10   10.95 ~ 133 0
20 V* WY Cha Or* 11 10 07.0323174364 -76 29 37.640377806   15.29 13.87   11.62 K8Ve 80 1
21 CHX 18N TT* 11 11 46.3366412620 -76 20 08.947142071   13.27 11.96   10.37 K5IVe 61 1
22 Sz 41 TT* 11 12 24.3971939698 -76 37 06.179976409   11.2 11.60   10.22 K7+M2.5 92 1
23 V* CV Cha Or* 11 12 27.7052551478 -76 44 22.298597430   12.02 10.98 10.51 9.76 G9Ve 177 1
24 Ass Cha T 2-54 TT* 11 12 42.6696152636 -77 22 22.928829312     11.103   9.653 G8+K7 80 2
25 NAME Cha II MoC 12 54 -77.2           ~ 303 0
26 Hen 3-854 Or* 13 05 20.6565859165 -77 39 01.505033200   13.88 12.40     K5 41 0
27 V* BM Cha Or* 13 08 06.2694469794 -77 55 05.329360813   16.77 14.60     K5 50 0
28 Sz 65 Or* 15 39 27.7717320499 -34 46 17.209059896   13.11 12.13 11.33 10.76 K7 75 0
29 NAME Lupus I Cld 15 43 02.1 -34 09 06           ~ 234 0
30 CD-33 10685 Or* 15 45 12.8670160093 -34 17 30.646921079 12.47 11.56 10.224 9.60 8.685 K3Ve 225 1
31 V* GW Lup Or* 15 46 44.7292759994 -34 30 35.677245389   13.8       M1.5e 89 0
32 V* HM Lup Or* 15 47 50.6290613485 -35 28 35.404500425   15.96       M3e 64 0
33 THA 15-5 TT* 15 47 56.9433443193 -35 14 34.797849332   14.5 16.2     K7e 67 0
34 V* HN Lup Or* 15 48 05.2154956876 -35 15 53.295162846           M3.5e 50 0
35 CD-35 10525 Or* 15 49 12.1055573607 -35 39 05.053991067 12.19 12.76 11.66 11.15   K7Ve 248 0
36 Sz 77 TT* 15 51 46.9579216483 -35 56 44.112995611   12.0       K5.5 55 0
37 THA 15-8 TT* 15 53 41.1668020196 -39 00 37.116322256   11.6 11.5     ~ 12 0
38 THA 15-9 TT* 15 53 42.6868709624 -38 08 10.466422483   11.7 11.5     ~ 11 0
39 HD 142361 TT* 15 54 59.8690406838 -23 47 18.187188652   9.68 8.960   8.092 G3V 68 0
40 THA 15-12 Or* 15 56 09.2067120748 -37 56 06.126159332   13.12 11.93 11.45   M0e 272 0
41 V* RU Lup Or* 15 56 42.3109948086 -37 49 15.473469159 9.27 10.07 9.60     K7/M0e 396 0
42 NAME Lup II MoC 15 57 08 -37 47.1           ~ 97 1
43 WRAY 15-1388 TT* 15 57 24.0104476686 -42 40 04.569519550   13.0 13.80     K7/M0 18 0
44 Sz 128 TT* 15 58 07.324 -41 51 47.96   13.5       M1 17 0
45 WRAY 15-1400 TT* 15 59 16.4714616661 -41 57 10.300292528   13.5 12.0     K7IVe 63 0
46 V* RY Lup Or* 15 59 28.3852522995 -40 21 51.255321659   12.62 9.90     G8/K1IV-V 177 0
47 Sz 130 TT* 16 00 31.0374928462 -41 43 36.991093739   15.82 14.71 13.56 12.46 M1.5 45 0
48 CD-22 11298 BY* 16 01 25.6303327926 -22 40 40.288752171   13.02 13.44     K1IV 57 0
49 V* V1154 Sco RS* 16 02 10.453776 -22 41 28.30308   12.46 11.32 10.96   K5+K5 52 0
50 HD 325367 Or* 16 03 05.4914377137 -40 18 25.426543472   11.40 8.50     M0 292 0
51 NAME Lupus IV MoC 16 03 12.4 -42 07 43           ~ 132 0
52 HD 144007 TT* 16 05 15.2633835562 -40 19 10.360894310   10.64 9.14     K2(III) 16 0
53 V* HO Lup Or* 16 07 00.603672 -39 02 19.49316   13.94 13.17 13.03   M1e 62 0
54 THA 15-19 Em* 16 07 04.9715782300 -39 28 33.292024129   13.4 14.2     M4 9 0
55 THA 15-21 TT* 16 07 10.0693512723 -39 11 03.258471635   15.28 13.70 13.70 12.49 K7-M0 55 0
56 THA 15-20 TT* 16 07 11.5876160594 -39 03 47.490881982   16.25 14.58 14.11 12.92 M0.5 79 0
57 Sz 96 TT* 16 08 12.6306575418 -39 08 33.469578208   14.80 13.43 13.69 11.84 ~ 66 0
58 V* V1279 Sco Or* 16 08 22.4935035747 -39 04 46.427826148   14.99 13.66 11.70 11.21 M0.4 88 1
59 THA 15-29 Y*O 16 08 30.2690257641 -39 06 11.174771741   14.8 11.14 15.18 13.15 M4 53 0
60 V* V856 Sco Ae* 16 08 34.2868591379 -39 06 18.326059778 7.66 7.41 7.05 6.92   A7IIIne_sh 358 0
61 THA 15-31 Em* 16 08 36.9029603891 -40 16 20.384805732   15.0 14     M4 16 0
62 V* V1193 Sco Or* 16 08 51.5694611925 -39 03 17.705756264   15.27 14.58 13.72 12.28 M4.5 56 0
63 THA 15-33 TT* 16 08 54.6847312618 -39 37 43.145460615   15.34 13.98 13.29   M1IVe 66 0
64 NAME Lupus III SFR 16 09.6 -39 03           ~ 282 0
65 THA 15-37 Y*O 16 09 44.3608441562 -39 13 30.167268370   15.84 14.59 14.20 12.38 M2 49 0
66 HD 144965 Be* 16 10 10.5553306132 -40 07 43.764883626 6.71 7.206 7.114     B3Vne 56 1
67 THA 15-42 Y*O 16 10 51.5851116158 -38 53 13.768173219   15.89 14.48 14.44 12.95 M1e 57 0
68 Wa Oph 1 Or* 16 11 08.9066752575 -19 04 46.972012700     12.073   10.194 K2IV(e) 62 0
69 ScoPMS 45 BY* 16 11 20.5773592889 -18 20 55.035157447     12.49     K5IV 27 0
70 V* V866 Sco Or* 16 11 31.345632 -18 38 25.96200   13.98 12.63 12.81   K0e+K5e 251 0
71 Wa Oph 2 Or* 16 11 59.2701883216 -19 06 53.315967884     11.66 11.57   K2Ve 62 0
72 BD-18 4244 Or* 16 12 40.5142870003 -18 59 28.267064720   12.15 10.829   9.235 K0IV(e) 85 0
73 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1157 1
74 Haro 1-4 Or* 16 25 10.508136 -23 19 14.78820       13.15   K4e 70 0
75 CD-24 12683 TT* 16 25 19.2425081811 -24 26 52.724827900   11.36 10.55   9.05 G9V 42 0
76 EM* SR 4 Or* 16 25 56.1659484606 -24 20 48.239269835     12.80 11.7 10.7 K0:Ve 157 1
77 Haro 1-6 Or* 16 26 03.0281201322 -24 23 36.193999164   14.15 14.01 12.38 10.80 K0 208 1
78 DoAr 24 TT* 16 26 17.0747576971 -24 20 21.594542024   16.06 14.21 14.02 11.57 K7.5V 103 1
79 GSS 31 TT* 16 26 23.3694945462 -24 20 59.580653864   15.9 14.70 14.33 11.53 K0e 138 1
80 EM* SR 24A TT* 16 26 58.5027167088 -24 45 36.698300286       14.15 12.87 K1 92 0
81 EM* SR 9 Or* 16 27 40.2858402419 -24 22 04.132012501   12.91 11.533 11.11 10.00 K5e 258 0
82 EM* SR 20 Or* 16 28 32.6877046986 -24 22 45.009576300   16.23   12.59   G7 77 0
83 EM* SR 13 Or* 16 28 45.2753496511 -24 28 18.830243306     13.60 12.40 10.9 M2e 126 0
84 NAME Sco-Oph Cloud ~ 16 30 00 -21 30.0           ~ 15 0
85 Haro 1-14 Or* 16 31 05.1624857597 -24 04 40.309934371       14.04   ~ 49 0
86 V* V2131 Oph Or* 16 31 15.7390747430 -24 34 02.512884637   12.0 12.05 11.06 10.13 ~ 94 0
87 ROXs 43A TT* 16 31 20.1187037852 -24 30 05.059723324   11.89 10.93     G5IVe 48 0
88 Haro 1-16 Or* 16 31 33.4638378966 -24 27 37.158295501   14.02 12.80     K3e 187 0
89 V* V1003 Oph Or* 16 34 09.1694383329 -15 48 16.776308800     13.44     G5 90 0
90 EM* AS 209 Or* 16 49 15.3035547820 -14 22 08.642015783   12.62 11.28     K4Ve 252 0
91 2MASS J19000157-3637054 TT* 19 00 01.5742226728 -36 37 05.511310245   15.19 13.93     M1V 19 0
92 V* S CrA Or* 19 01 08.597088 -36 57 19.89504   11.76 10.91 11.41   G0Ve+K0Ve 261 0
93 V* V709 CrA Or* 19 01 34.8590599569 -37 00 56.581106047   12.70 11.03     K1IV 58 0
94 NAME CrA Dark Cloud MoC 19 01 51 -36 58.9           ~ 408 0
95 V* R CrA Ae* 19 01 53.6850227874 -36 57 08.145519972 12.781 12.651 11.917 11.242 10.412 B5IIIpe 456 1
96 V* T CrA Ae* 19 01 58.7901571143 -36 57 50.329832417     11.67     F0 157 0
97 V* VV CrA Or* 19 03 06.7419790029 -37 12 49.683383133   16.45 14.67 14.12 11.62 K7 111 0
98 NAME Upper Scorpius B As* ~ ~           ~ 12 0
99 NAME Upper Scorpius A As* ~ ~           ~ 16 0

    Equat.    Gal    SGal    Ecl

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2021.01.19-15:09:22

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