Zinc Abundances in Metal-Poor Stars

Details Zinc Abundances in Metal-Poor Stars Zinc Abundances in Metal-Poor Stars

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..847..464s&link_type=abstract

ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: International Symposium on Origin of Matter and Evolution of Galaxies 2005: New Hori

Astronomy and Astrophysics

Astrophysics

1

Abundances, Chemical Composition, Population Ii Stars

Scientific paper

We obtained high resolution (50000) spectra of 38 stars with -3.0 < [Fe/H] <= 0 using HIDES at Okayama Astrophysical Observatory in order to clarify the behavior of zinc abundances and to obtain the clue to the origin of zinc. We estimated effective temperatures by the color indices based on the IRFM, and surface gravities by the basic relation based on luminosity and mass estimated from Hipparcos parallaxes and evolutionary tracks, on the HR diagram. Microturbulences and Fe abundances were determined from FeI and FeII lines, respectively. We measured the equivalent widths of ZnI lines at 4722.2, 4810.5 Å. We confirmed that [Zn/Fe] shows flat trend in the range of -2.0 < [Fe/H] <= 0 with almost the solar value, and changes into an increasing trend at [Fe/H] = -2.0 with decreasing [Fe/H].

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