Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 747, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/747/1/L8
Keywords
nuclear reactions, nucleosynthesis, abundances; stars: abundances; stars: individual (BD+17 3248, HD 108317, HD 128279); stars: Population II
Categories
Funding
- NASA [NAS 5-26555, NNX09AL13G]
- NASA through the Space Telescope Science Institute [12268]
- Carnegie Institution of Washington
- U.S. National Science Foundation [PHY 02-16783, PHY 08-22648]
- NSF [PHY-1102511, AST 09-08978]
- NASA [113596, NNX09AL13G] Funding Source: Federal RePORTER
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0908978] Funding Source: National Science Foundation
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Using near-ultraviolet spectra obtained with the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope, we detect neutral tellurium in three metal-poor stars enriched by products of r-process nucleosynthesis, BD +17 3248, HD 108317, and HD 128279. Tellurium (Te, Z = 52) is found at the second r-process peak (A approximate to 130) associated with the N = 82 neutron shell closure, and it has not been detected previously in Galactic halo stars. The derived tellurium abundances match the scaled solar system r-process distribution within the uncertainties, confirming the predicted second peak r-process residuals. These results suggest that tellurium is predominantly produced in the main component of the r-process, along with the rare earth elements.
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