Other
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1094..928h&link_type=abstract
COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.
Other
1
Giant And Subgiant Stars, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Astronomical And Space-Research Instrumentation
Scientific paper
We present the results of a spectroscopic study of over 500 dwarf and giant stars within 100 pc of the Sun. Using stellar metallicity data, the goal of this study is to determine if there are any significant variations of metallicity related to stellar characteristics or location in the Galaxy. The abundance data are based on high-resolution spectroscopy and correlated with kinematical properties based on Hipparcos data. The spectroscopic data are made available to the public through an on-line database. We find that most elements behave as expected from galactic chemical evolution and are consistent with standard stellar evolution. Interesting trends are found for some elements, e.g. Mn and probably Ba. There is evidence for systematic carbon abundance variations in the red giant clump. To determine the uniqueness of the local region, in particular at its galactocentric radius, one should consider in-depth spectroscopic and kinematic studies of dwarfs and giants in similar sized volumes in other regions of the disk. This will require accurate positions, distances and space motions out to hundreds of parsecs from space missions such as Gaia, and next-generation telescopes for high-resolution spectroscopy.
Heiter Ulrike
Luck Earle R.
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