2002ApJ...569..863P

Query : 2002ApJ...569..863P

2002ApJ...569..863P - Astrophys. J., 569, 863-871 (2002/April-3)

The smallest mass ratio young star spectroscopic binaries.

PRATO L., SIMON M., MAZEH T., McLEAN I.S., NORMAN D. and ZUCKER S.

Abstract (from CDS):

Using high-resolution near-infrared spectroscopy with the Keck Telescope, we have detected the radial velocity signatures of the cool secondary components in four optically identified pre-main-sequence, single-lined spectroscopic binaries. All are weak-lined T Tauri stars with well-defined center-of-mass velocities. The mass ratio for one young binary, NTTS 160905-1859, is M2/M1=0.18±0.01, the smallest yet measured dynamically for a pre-main-sequence spectroscopic binary. These new results demonstrate the power of infrared spectroscopy for the dynamical identification of cool secondaries. Visible-light spectroscopy, to date, has not revealed any pre-main-sequence secondary stars with masses <0.5 M☉, while two of the young systems reported here are in that range. We compare our targets with a compilation of the published young, double-lined spectroscopic binaries and discuss our unique contribution to this sample.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Spectroscopic - Stars: Fundamental Parameters - Stars: Pre-Main-Sequence

Errata: erratum vol. 598, p. 1409 (2003)

Simbad objects: 64

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Number of rows : 64
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 HD 1326 PM* 00 18 22.8849799680 +44 01 22.637951588   9.61 8.14 7.3   M2V 602 0
2 * 9 Cet BY* 00 22 51.7884553555 -12 12 33.969921319 7.29 7.05 6.39     G2.5V 510 0
3 * eta Cas PM* 00 49 06.2945942922 +57 48 54.638239716 4.04 4.02 3.44 2.94 2.58 F9V 680 0
4 V* LO Eri RS* 03 50 30.8226917856 -13 55 29.757472356   11.65 10.759   9.816 K0-K1+K1-K2 25 0
5 * 39 Tau ** 04 05 20.2580439192 +22 00 32.057399592   6.54 5.90 5.5   G5V 235 0
6 HD 283447 Or* 04 14 12.9261150912 +28 12 12.359055168 13.17 12.07 10.68 9.45 8.67 K3Ve 445 0
7 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
8 V* V826 Tau TT* 04 32 15.8393134800 +18 01 38.750623752   13.51 12.074   10.312 K7.0 187 0
9 HD 283750 BY* 04 36 48.2421502608 +27 07 55.888214520   9.19 8.10 7.4   K2.5Ve 289 0
10 V* MM Eri ** 04 40 59.794752 -08 40 02.45424   10.78 10.15 10.07   G7 11 0
11 V* DQ Tau Or* 04 46 53.0575226016 +17 00 00.136127304 14.56 13.67 12.00 13.21   M1Ve 373 0
12 V* V397 Aur Or* 04 56 02.0265224208 +30 21 03.670989228   13.07 11.72 11.25   K7e 183 0
13 V* V1642 Ori TT* 05 29 20.633592 +00 41 27.99600   13.31 12.31 12.03   K2(e) 44 0
14 V* V1878 Ori Or* 05 30 42.6347292144 -04 35 01.901663412   12.60 11.521   10.221 K3e 36 0
15 V* V1882 Ori SB* 05 32 02.2843553976 -07 31 55.693377192     12.57 12.41   K4 16 0
16 Brun 334 Or* 05 34 39.7638260448 -05 24 25.590693312 14.065 12.535 11.606   9.794 K3V+K5V 92 0
17 V* V1326 Ori Or* 05 35 09.7681644000 -05 23 26.898475704 16.267 14.776 13.806   11.678 K8 70 0
18 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
19 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 623 0
20 V* V1229 Ori Or* 05 35 18.3705735744 -05 22 37.440079608 15.941 14.257 13.251   10.987 K0 92 0
21 BD-05 1340 * 05 37 08.9527890648 -05 10 39.438439248   11.97 11.36     G7IV 24 0
22 V* V1814 Ori Or* 05 37 09.5211327120 -06 06 16.309879272   11.62 10.622 10.24 9.578 K0IV/V 47 0
23 2MASS J05371161-0232087 TT* 05 37 11.6194325448 -02 32 08.795526792   13.78 12.71 12.59 11.40 K2.0 23 0
24 V* V2758 Ori Or* 05 41 23.9428581864 -03 24 46.016418492   12.49 11.37     K1 23 0
25 Ross 47 BY* 05 42 09.2676872099 +12 29 21.604835564 14.264 13.130 11.509 10.298 8.709 M4V 304 0
26 V* GG Ori SB* 05 43 10.2226873248 -00 41 14.798359644   10.92       A2 79 0
27 VSS VI-16 Y*O 05 47 02.540472 -00 09 28.44432   14.65 13.47 13.21   K 16 0
28 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
29 NGC 2264 134 TT* 06 40 59.3436338472 +09 55 20.165321712 13.918 13.22 12.38 11.908 11.47 G5V 67 0
30 HD 52919 PM* 07 02 42.9174539135 -06 47 57.214117747 10.45 9.442 8.351 7.708 7.18 K4V 95 0
31 G 107-69 PM* 07 30 42.7784278176 +48 11 58.588890241       13.218   M4V 68 0
32 * 9 Cha SB* 08 43 12.1984130688 -79 04 12.368512452   6.28 6.07     A7V 242 0
33 LP 666-9 BD* 08 53 36.1604798120 -03 29 32.197505547     18.959 16.781 14.487 M9Ve 274 1
34 HD 76151 PM* 08 54 17.9470964696 -05 26 04.054298491 6.89 6.67 6.00     G2V 580 0
35 LP 731-58 PM* 10 48 12.6142508200 -11 20 09.610693470     15.784 16.01 11.25 M6.5V 198 0
36 Wolf 358 BY* 10 50 52.0312380389 +06 48 29.259617410 14.532 13.319 11.675 10.459 8.889 M4V 298 0
37 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
38 LP 551-63 PM* 11 06 18.9746601198 +04 28 32.670142533   20.2 19.560 17.25 14.91 M6.5V 39 0
39 HD 98800B SB* 11 22 05.2890267409 -24 46 38.767455498   11.18 9.92     ~ 144 1
40 Ross 905 PM* 11 42 11.0933350978 +26 42 23.650782778   12.06 10.613 10.272 8.24 M3V 750 1
41 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 887 0
42 * 61 Vir PM* 13 18 24.3139864471 -18 18 40.297748582 5.710 5.440 4.740     G6.5V 742 1
43 V* V1154 Sco Or* 16 02 10.4340916128 -22 41 28.824128520   12.46 11.32 10.96   K5+K5 56 0
44 NAME Lupus Complex SFR 16 03 -38.1           ~ 851 0
45 CD-39 10292 TT* 16 03 52.5008065896 -39 39 01.266425244 12.83 12.00 11.01 10.38 9.79 K3V 32 0
46 Wa Oph 2 Or* 16 11 59.2702332696 -19 06 53.316517068     11.66 11.57   K2Ve 74 0
47 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
48 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
49 V* V2131 Oph Or* 16 31 15.7445171496 -24 34 02.161097472   12.0 12.05 11.06 10.13 ~ 102 0
50 V* AK Sco Ae* 16 54 44.8491575376 -36 53 18.566586456 9.80 9.63 9.00     F5V 304 1
51 VB 8 LM* 16 55 35.2557374336 -08 23 40.753073075   18.7 16.916 14.566 12.24 M7Ve 457 0
52 HD 155555 RS* 17 17 25.5053342232 -66 57 03.732141636 7.795 7.499 6.723   6.39 G5V+K1V 292 1
53 Ross 867 PM* 17 19 52.9654155615 +26 30 02.667757724   14.67   12.649   M4.5V 130 0
54 HD 319139 SB* 18 14 10.4818675368 -32 47 34.516836060   11.47 10.68   9.11 K5+K7 423 0
55 V* TY CrA Ae* 19 01 40.8284458320 -36 52 33.816176040 10.03 9.92 9.39     B9e 301 0
56 NAME Corona Australis Cloud MoC 19 01 51 -36 58.9           ~ 554 0
57 HD 180617 PM* 19 16 55.2565688720 +05 10 08.040554168 11.768 10.63 9.115 8.076 6.782 M3-V 475 0
58 HD 182488 PM* 19 23 34.0131683760 +33 13 19.078425912       5.8   K0V 306 1
59 HD 184489 PM* 19 34 39.8398836218 +04 34 57.049538303 11.917 10.707 9.326 8.475 7.7 M0V 152 0
60 HD 196850 PM* 20 38 40.1900743416 +38 38 06.337967064   7.37   6.4   G1V 105 0
61 * 61 Cyg A BY* 21 06 53.9395895022 +38 44 57.902349973 7.50 6.39 5.21 4.19 3.54 K5V 1099 0
62 * 61 Cyg B PM* 21 06 55.2638444466 +38 44 31.358519864 8.63 7.40 6.03 4.86 3.55 K7V 765 0
63 V* EK Cep SB* 21 41 21.5042268336 +69 41 34.112933916   7.95 7.89     A0V 222 0
64 NAME Ori Belt reg ~ ~           ~ 83 0

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