2001A&A...378..898M


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.12CET03:03:08

2001A&A...378..898M - Astronomy and Astrophysics, volume 378, 898-906 (2001/11-2)

On the pre-main sequence circularization period.

MELO C.H.F., COVINO E., ALCALA J.M. and TORRES G.

Abstract (from CDS):

In this paper we present an updated compilation of the currently known pre-main sequence (PMS) spectroscopic binaries (SB) for which orbital elements have been determined. In particular we report our results for and discuss the case of the bona-fide PMS system RX J1603.9-3938, which has a circular orbit and a period of 7.56 days. This is the longest orbital period for a circular orbit found among the bona-fide PMS spectroscopic binaries so far, and we suggest that this system may be thus considered to now set the PMS circularization period. The longer period is compatible with the circularization periods already known for older binary populations such as the Hyades and Praesepe. When considered in the context of the circularization periods for other binary populations of different ages, the new PMS circularization period strongly supports the suggestion of Mathieu et al. (1992, in Binaries as tracers of stellar formation, ed. Duquennoy, & Mayor (Cambridge University Press), 278) that a hybrid scenario (tidal circularization occurring on both PMS phase and on MS phase) could explain the observed circularization periods as a function of age. The apparently circular orbit observed in another PMS system, RX J1301.0-7654a, with an orbital period of nearly 13 days, may perhaps change this picture when the orbit is improved and the system is better understood.

Abstract Copyright:

Journal keyword(s): stars: binaries: spectroscopic - stars: pre-main sequence - stars: individual: RX J1603.9-3938

Simbad objects: 51

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Number of rows : 51

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2910 0
2 HD 283447 TT* 04 14 12.9232870093 +28 12 12.378540314 13.17 12.07 10.68 9.45 8.67 K3Ve 374 0
3 V* V1098 Tau TT* 04 14 47.9897419517 +27 52 34.232647358   14.08 11.73 10.95   M1 104 0
4 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2583 0
5 NAME Tau-Aur Region SFR 04 30 +25.0           ~ 1181 1
6 V* V826 Tau TT* 04 32 15.8394065935 +18 01 38.751126168   13.51 12.074   10.312 K7.0 161 0
7 V* UZ Tau TT* 04 32 43.022 +25 52 30.90           M4Ve+M1/3Ve 282 0
8 V* DQ Tau TT* 04 46 53.0577037389 +17 00 00.135310040 14.56 13.67 12.00 13.21   M1Ve 279 0
9 V* V397 Aur TT* 04 56 02.0261376554 +30 21 03.635056925   13.07 11.72 11.25   K7e 147 0
10 V* GW Ori TT* 05 29 08.3925564419 +11 52 12.653756566   10.83 10.10 9.52   G5/8Ve 292 2
11 V* V1642 Ori TT* 05 29 20.633592 +00 41 27.99600   13.31 12.31 12.03   K2 45 0
12 V* V1878 Ori Or* 05 30 42.6347868035 -04 35 01.899769035   12.60 11.521   10.221 K3e 24 0
13 V* V1882 Ori SB* 05 32 02.2843566911 -07 31 55.694241873     12.57 12.41   K4 13 0
14 Brun 334 pr* 05 34 39.7639432774 -05 24 25.589725695 14.065 12.535 11.606   9.794 K3V+K5V 69 0
15 V* V1326 Ori BY* 05 35 09.7683440740 -05 23 26.899188471 16.267 14.776 13.806   11.678 K8 56 0
16 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1432 1
17 V* V1229 Ori Or* 05 35 18.3727420 -05 22 37.429392 15.941 14.257 13.251   10.987 K0 77 0
18 BD-05 1340 *iN 05 37 08.9526883522 -05 10 39.437383679   11.97 11.36     G7IV 19 0
19 V* V1814 Ori Or* 05 37 09.5213309361 -06 06 16.310368196   11.62 10.622 10.24 9.578 K0IV/V 40 0
20 2MASS J05371161-0232087 Y*O 05 37 11.6194764264 -02 32 08.796390100   13.78 12.71 12.59 11.40 K2.0 11 0
21 V* V2758 Ori Or* 05 41 23.9429612738 -03 24 46.017364551   12.49 11.37     K1 15 0
22 NAME OriNTT 569 SB* 05 47 03 -00 09.5           K 6 0
23 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1546 1
24 NGC 2264 134 TT* 06 40 59.3436202135 +09 55 20.166584605 13.918 13.22 12.38 11.908 11.438 G5V 46 0
25 V* V810 Mon Or* 06 41 04.4080686745 +09 51 50.052676670 13.677 13.60 12.464 11.934 11.440 K0+M0 29 0
26 2MASS J06410777+0944030 TT* 06 41 07.7776263095 +09 44 02.994800564 14.391 14.17 13.424 12.940 12.494 K0+M4 31 0
27 NGC 2632 OpC 08 40 24 +19 40.0           ~ 1180 0
28 * 9 Cha Al* 08 43 12.1978606956 -79 04 12.366179858   6.28 6.07     A7V 204 0
29 NGC 2682 OpC 08 51 18 +11 48.0           ~ 1987 0
30 [AKS95b] RX J1108.8-7519a TT* 11 08 49.73 -75 19 41.6           ~ 9 0
31 HD 98800B SB* 11 22 05.288 -24 46 39.05           ~ 106 1
32 HD 98800 RS* 11 22 05.28975 -24 46 39.7571   10.27 8.912 9.257 7.386 K5V(e) 321 0
33 2MASS J13005622-7654021 TT* 13 00 56.22 -76 54 02.1     12.438   10.446 K5 13 0
34 IRAS 13085-6443 * 13 11 49.74 -64 58 59.8           ~ 16 0
35 ScoPMS 20 BY* 16 01 05.189448 -22 27 31.18104   15.23 13.69 13.38   M3Ve 27 0
36 ScoPMS 23 RS* 16 02 10.4322417492 -22 41 28.791488638           K5+K5 50 0
37 CD-39 10292 TT* 16 03 52.4932393087 -39 39 01.287069408 12.83 12.00 11.01 10.38 9.79 K3V 23 0
38 Wa Oph 1 TT* 16 11 08.9066752575 -19 04 46.972012700     12.073   10.194 K2IV(e) 60 0
39 Wa Oph 2 TT* 16 11 59.2701883216 -19 06 53.315967884       11.57   K2Ve 56 0
40 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1080 1
41 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 593 2
42 Haro 1-14 TT* 16 31 05.1624857597 -24 04 40.309934371       14.04   ~ 46 0
43 V* V2131 Oph Or* 16 31 15.7390747430 -24 34 02.512884637   12.0 12.05 11.06 10.13 ~ 90 0
44 ROXs 43A TT* 16 31 20.1187037852 -24 30 05.059723324   11.89 10.93     G5IVe 46 0
45 V* AK Sco Ae* 16 54 44.8497760618 -36 53 18.560813962 9.80 9.63 9.00     F5V 226 1
46 HD 155555 RS* 17 17 25.5047544575 -66 57 03.732827572 7.795 7.499 6.723   6.39 K1Vp 246 2
47 HD 319139 BY* 18 14 10.4818974563 -32 47 34.516106830   11.47 10.68   9.11 K5+K7 273 0
48 V* TY CrA Ae* 19 01 40.8312189956 -36 52 33.801844387 10.03 9.92 9.39     B9e 266 0
49 NAME CrA Dark Cloud MoC 19 01 51 -36 58.9           ~ 384 0
50 V* EK Cep Al* 21 41 21.5039950844 +69 41 34.108387051   7.95 7.89     A0V 198 0
51 NAME Ori Belt reg ~ ~           ~ 65 0

    Equat.    Gal    SGal    Ecl

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2019.11.12-03:03:08

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