The Kinematics and Origin of smr Stars |
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Authors: | M Grenon |
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Institution: | (1) Observatoire de Genève, 1290 Sauverny, Switzerland |
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Abstract: | Ages and kinematics are revised for SMR stars (M/H] >+0.30) common to NLTT and HIPPARCOS catalogues. The origin of MR to
SMR stars appears heterogeneous: part of them, of intermediate age, were formed few kpc inside the solar orbit, from slowly
enriched gas, whereas the oldest SMRs were born early, closer to the galactic center where the metal-enrichment had been fast.
Perturbations by the galactic bar explain the peculiar motions of local SMRs as well as their outwards migration.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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