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2篇 您的检索式:作者名="Takuma Suda"
    题名 作者 年代 出处 被引量
1The origin of carbon-enhancement and initial mass of extremely metal-poor stars in the galactic halo显示文摘YUTAKA KOMIYA TAKUMA SUDA HIROKI MINAGUCHI 2007Astrophysical Journal2007,658,:1
2Discovery of a strongly r-process enhanced extremely metal-poor star LAMOST J110901.22+075441.8显示文摘We report the discovery of an extremely metal-poor(EMP) giant,LAMOST J110901.22+075441.8, which exhibits a large excess of r-process elements with [Eu/Fe] ~ +1.16. The star is one of the newly discovered EMP stars identified from the LAMOST low-resolution spectroscopic survey and a highresolution follow-up observation with the Subaru Telescope. Stellar parameters and elemental abundances have been determined from the Subaru spectrum. Accurate abundances for a total of 23 elements including 11 neutron-capture elements from Sr through Dy have been derived for LAMOST J110901.22+075441.8. The abundance pattern of LAMOST J110901.22+075441.8 in the range of C through Zn is in line with the 'normal' population of EMP halo stars, except that it shows a notable underabundance in carbon. The heavy element abundance pattern of LAMOST J110901.22+075441.8 is in agreement with other well studied cool r-II metal-poor giants such as CS 22892-052 and CS 31082-001. The abundances of elements in the range from Ba through Dy match the scaled solar r-process pattern well.LAMOST J110901.22+075441.8 provides the first detailed measurements of neutroncapture elements among r-II stars at such low metallicity with [Fe/H]-3.4, and exhibits similar behavior as other r-II stars in the abundance ratio of Zr/Eu as well as Sr/Eu and Ba/Eu.Hai-Ning Li Wako Aoki Satoshi Honda Gang Zhao Norbert Christlieb Takuma Suda 2015Research in Astronomy and Astrophysics2015,15,8:1
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