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Abundance analysis and origin of the zeta-sculpturis open cluster

Edvardsson, Björn; Petterson, Bertil; Olsson, Maryam LU and Westerlund, Bertil (1995) In Astronomy & Astrophysics 293. p.75-86
Abstract
We have determined chemical abundances and radial velocities for stars in the field of the zeta Sculptoris cluster. We find that the cluster metal deficiency previously found from UBV photometry is not supported; the cluster overall metallicity, [Fe/H]=+0.23, is about 70% higher than the solar value. The chemical abundance pattern appears unusual: the Ni/Fe ratio is lower than typical for field stars with similar Fe and Ca abundances, and the cluster may also be deficient in the alpha element Si. For its age, the cluster is unusually far from the galactic disk, =~240pc. The adopted heliocentric cluster radial velocity, +3.9km/s, shows that it is close to its maximum distance from the galactic plane. We suggest that the zetaSculptoris... (More)
We have determined chemical abundances and radial velocities for stars in the field of the zeta Sculptoris cluster. We find that the cluster metal deficiency previously found from UBV photometry is not supported; the cluster overall metallicity, [Fe/H]=+0.23, is about 70% higher than the solar value. The chemical abundance pattern appears unusual: the Ni/Fe ratio is lower than typical for field stars with similar Fe and Ca abundances, and the cluster may also be deficient in the alpha element Si. For its age, the cluster is unusually far from the galactic disk, =~240pc. The adopted heliocentric cluster radial velocity, +3.9km/s, shows that it is close to its maximum distance from the galactic plane. We suggest that the zetaSculptoris cluster was formed in the galactic disk 45Myr ago by the interaction of a high velocity cloud with the interstellar medium, and that its formation may be connected with that of Gould's Belt. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Astronomy & Astrophysics
volume
293
pages
75 - 86
publisher
EDP Sciences
ISSN
0004-6361
language
English
LU publication?
no
id
bc6cdbe9-a7e1-4bd8-821e-9be77a113210 (old id 4645406)
alternative location
http://arxiv.org/abs/astro-ph/9405068
date added to LUP
2014-09-10 13:07:45
date last changed
2016-09-20 15:08:00
@article{bc6cdbe9-a7e1-4bd8-821e-9be77a113210,
  abstract     = {We have determined chemical abundances and radial velocities for stars in the field of the zeta Sculptoris cluster. We find that the cluster metal deficiency previously found from UBV photometry is not supported; the cluster overall metallicity, [Fe/H]=+0.23, is about 70% higher than the solar value. The chemical abundance pattern appears unusual: the Ni/Fe ratio is lower than typical for field stars with similar Fe and Ca abundances, and the cluster may also be deficient in the alpha element Si. For its age, the cluster is unusually far from the galactic disk, =~240pc. The adopted heliocentric cluster radial velocity, +3.9km/s, shows that it is close to its maximum distance from the galactic plane. We suggest that the zetaSculptoris cluster was formed in the galactic disk 45Myr ago by the interaction of a high velocity cloud with the interstellar medium, and that its formation may be connected with that of Gould's Belt.},
  author       = {Edvardsson, Björn and Petterson, Bertil and Olsson, Maryam and Westerlund, Bertil},
  issn         = {0004-6361},
  language     = {eng},
  pages        = {75--86},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {Abundance analysis and origin of the zeta-sculpturis open cluster},
  volume       = {293},
  year         = {1995},
}