2015ApJ...807..119R


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.13CET11:56:47

2015ApJ...807..119R - Astrophys. J., 807, 119 (2015/July-2)

Internal and relative motions of the Taurus and Ophiuchus star-forming regions.

RIVERA J.L., LOINARD L., DZIB S.A., ORTIZ-LEON G.N., RODRIGUEZ L.F. and TORRES R.M.

Abstract (from CDS):

We investigate the internal and relative motions of the Taurus and Ophiuchus star-forming regions using a sample of young stars with accurately measured radial velocities and proper motions. We find no evidence for expansion or contraction of the Taurus complex, but a clear indication of global rotation, resulting in velocity gradients of the order of 0.1 km/s/pc across the region. In the case of Ophichus, more data are needed to reliably establish its internal kinematics. Both Taurus and Ophiuchus, have a bulk motion relative to the LSR (i.e., a non-zero mean peculiar velocity) of the order of 5 km/s. Interestingly, these velocities are roughly equal in magnitude, but nearly exactly opposite in direction. Moving back in time, we find that Taurus and Ophiuchus must have been very near each other 20-25 Myr ago. This suggests a common origin, possibly related to that of Gould's Belt.

Abstract Copyright:

Journal keyword(s): astrometry - ISM: kinematics and dynamics - stars: formation - techniques: interferometric - techniques: radial velocities

Simbad objects: 28

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Number of rows : 28

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 HD 283447 TT* 04 14 12.9232870093 +28 12 12.378540314 13.17 12.07 10.68 9.45 8.67 K3Ve 374 0
2 LDN 1495 DNe 04 18.1 +27 37           ~ 275 1
3 V* V1023 Tau TT* 04 18 47.0296109602 +28 20 07.490327496   14.31 12.00 11.21   K7 136 0
4 V* RY Tau TT* 04 21 57.4132838427 +28 26 35.533990877 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 634 1
5 HD 283572 TT* 04 21 58.8482823933 +28 18 06.511915195   9.80 9.03 9.14   G5IVe 262 0
6 NAME T Tau S ** 04 21 59.371 +19 32 05.95           K7 137 2
7 V* T Tau TT* 04 21 59.4323326335 +19 32 06.439974179   11.01 9.30 9.80   K0IV/Ve 1239 2
8 NAME T Tau N *i* 04 21 59.433 +19 32 06.42   11.22 10.12 9.80   K1.5 163 1
9 NAME DG Tau B Y*O 04 27 02.666 +26 05 30.38           ~ 126 1
10 V* DG Tau TT* 04 27 04.6913654419 +26 06 16.041555299 13.57 13.97 10.50 12.28   K6Ve 901 1
11 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 761 1
12 HBC 393 FU* 04 31 34.077 +18 08 04.90           K3V/M3III 773 2
13 V* HP Tau TT* 04 35 52.7821592361 +22 54 23.158368128 17.39 14.9 14.90     K2-5e 184 0
14 CoKu HP Tau G3 TT* 04 35 53.4991854163 +22 54 09.000431829 18.21   14.8     M0.6 54 0
15 CoKu HP Tau G2 TT* 04 35 54.1553246504 +22 54 13.404170652 13.63 12.31 11.158 10.14 9.172 G2e 109 0
16 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3320 0
17 Haro 1-6 TT* 16 26 03.0281201323 -24 23 36.193999164   14.15 14.01 12.38 10.80 K0 197 1
18 GSS 35 TT* 16 26 34.1750440278 -24 23 28.331873112     16.53 14.75 12.51 B3 209 1
19 JCMTSF J162726.6-244050 Rad 16 27 26.913 -24 40 50.14           ~ 14 0
20 [GRC2000] VLA 2 Rad 16 27 26.936 -24 40 50.63           ~ 12 0
21 YLW 15 Y*O 16 27 26.93640 -24 40 50.8224           ~ 233 1
22 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2936 0
23 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 999 1
24 NAME IRAS 16293-2422B Y*O 16 32 22.63 -24 28 31.8           ~ 163 0
25 [W89] A2 Rad 16 32 22.866 -24 28 35.90           ~ 21 0
26 [W89] A1 Rad 16 32 22.887 -24 28 35.67           ~ 22 0
27 LDN 1689N DNe 16 32 31 -24 28.6           ~ 104 0
28 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11037 0

    Equat.    Gal    SGal    Ecl

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2019.11.13-11:56:47

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