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UBVRI Photometry of FKSZ Stars - Part One
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1987A&AS...70..369C&db_key=AST
| A new interpretation of the heavy element abundances in metal-deficient stars
Observations of element abundances in extremely metal-deficient starsare reviewed. Particular attention is given to trends in the abundancesof the neutron capture products yttrium, barium, and europium. Thevariations in Y/Fe and Ba/Fe with Fe/H are found to defy simpleexplanation in the context of current theories: the conventionalinterpretation of these abundances as resulting from s-processing may beincorrect. It is suggested rather, that the observed trends follow in anatural and straightforward manner from the assumption that the Y and Bain the most extreme metal-poor stars represent products of r-processnucleosynthesis. Implications for galactic evolution and nucleosynthesisare briefly discussed.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Su Yilani |
| Sað Açýklýk: | 10h01m51.71s |
| Yükselim: | -12°53'55.7" |
| Görünürdeki Parlaklýk: | 7.935 |
| Uzaklýk: | 186.567 parsek |
| özdevim Sað Açýklýk: | -11.7 |
| özdevim Yükselim: | -13.3 |
| B-T magnitude: | 9.047 |
| V-T magnitude: | 8.027 |
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