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| Query : 2006MNRAS.371L...6J |
2006MNRAS.371L...6J - Mon. Not. R. Astron. Soc., 371, L6-L10 (2006/September-1)
Kinematic structure in the young σ Orionis association.
JEFFRIES R.D., MAXTED P.F.L., OLIVEIRA J.M. and NAYLOR T.
Abstract (from CDS):
We have used precise radial velocity measurements for a large number of candidate low-mass stars and brown dwarfs to show that the young σ Ori `cluster' consists of two spatially superimposed components which are kinematically separated by 7 km/s in radial velocity, and which have different mean ages. We examine the relationship of these two kinematic groups to other populations in the Orion OB1 association, and briefly discuss the consequence of mixed age samples for ongoing investigations of the formation and evolution of low-mass objects in this much-observed region.
Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS
Journal keyword(s): stars: low-mass, brown dwarfs - stars: pre-main-sequence - open clusters and associations: individual: σ Orionis
Simbad objects: 10
| Number of rows : 10 |
| 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 34055 | LP? | 05 14 36.9533195664 | -00 33 46.230060672 | 8.278 | 6.839 | M4III | 37 | 0 | |||
| 2 | Ass Ori OB 1b | As* | 05 34.0 | -01 30 | ~ | 281 | 0 | |||||
| 3 | NAME Ori I | As* | 05 38 | -02.8 | ~ | 653 | 0 | |||||
| 4 | NAME sig Ori Cluster | OpC | 05 38 42 | -02 36.0 | ~ | 623 | 0 | |||||
| 5 | * sig Ori | Y*O | 05 38 44.7653828520 | -02 36 00.283179888 | 2.54 | 3.58 | 3.79 | 3.87 | 4.11 | O9.5V+B0.2V(n) | 855 | 0 |
| 6 | * zet Ori | ** | 05 40 45.52666 | -01 56 33.2649 | 0.50 | 1.56 | 1.77 | 1.85 | 2.05 | O9.7Ib+B0III | 375 | 0 |
| 7 | Wolf 358 | BY* | 10 50 52.0312380389 | +06 48 29.259617410 | 14.532 | 13.319 | 11.675 | 10.459 | 8.889 | M4V | 298 | 0 |
| 8 | Wolf 359 | PM* | 10 56 28.9208702274 | +07 00 53.003285286 | 16.706 | 15.541 | 13.507 | 11.684 | 9.507 | dM6 | 775 | 0 |
| 9 | BD-15 6290 | BY* | 22 53 16.7325836486 | -14 15 49.304052185 | 12.928 | 11.749 | 10.192 | 9.013 | 7.462 | M3.5V | 1106 | 1 |
| 10 | Ass Ori OB 1a | As* | ~ | ~ | ~ | 237 | 0 |
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