Robin Jeffries r.d.jeffries@keele.ac.uk
Kinematic structure in the young σ Orionis association
Jeffries, R.D.; Maxted, P.F.L.; Oliveira, J.M.; Naylor, Tim
Authors
Pierre Maxted p.maxted@keele.ac.uk
Joana Maria Oliveira j.oliveira@keele.ac.uk
Tim Naylor
Abstract
We have used precise radial velocity measurements for a large number of candidate low-mass stars and brown dwarfs, to show that the young Sigma 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.
Journal Article Type | Article |
---|---|
Acceptance Date | May 23, 2006 |
Online Publication Date | Sep 1, 2006 |
Publication Date | 2006-09 |
Publicly Available Date | Mar 28, 2024 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Publisher | Oxford University Press |
Peer Reviewed | Peer Reviewed |
Volume | 371 |
Issue | 1 |
Pages | L6 - L10 |
DOI | https://doi.org/10.1111/j.1745-3933.2006.00196.x |
Keywords | stars, low-mass brown dwarfs, pre-main-sequence, open clusters and associations, individual, s Orionis |
Publisher URL | http://dx.doi.org/10.1111/j.1745-3933.2006.00196.x |
Files
0605616v1.pdf
(234 Kb)
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