Discovery of HE 1523-0901, a Strongly r-Process-enhanced Metal-poor Star with Detected Uranium
We present age estimates for the newly discovered, very r-process-enhanced metal-poor star HE 1523-0901 ([Fe/H] = -2.95) based on the radioactive decay of Th and U. The bright (V = 11.1) giant was found among a sample of bright metal-poor stars selected from the Hamburg/ESO Survey. From an abundance analysis of a high-resolution (R = 75,000) VLT/UVES spectrum, we find HE 1523-0901 to be strongly overabundant in r-process elements ([r/Fe] = 1.8). The abundances of heavy neutron-capture elements...[Show more]
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|Source:||Astrophysical Journal, The|
|01_Frebel_Discovery_of_HE_1523-0901,_a_2007.pdf||143.34 kB||Adobe PDF||Request a copy|
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