BD+17°3248 is an old Population II star located at a distance of roughly in the Galactic Halo. It belongs to the class of ultra-metal-poor stars, especially the very rare subclass of neutron-capture (r-process) enhanced stars.
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BD+17°3248 is an old Population II star located at a distance of roughly in the Galactic Halo. It belongs to the class of ultra-metal-poor stars, especially the very rare subclass of neutron-capture (r-process) enhanced stars.
Since about 2000, the star has been studied with 3 telescopes: the Hubble Space Telescope, the Keck I telescope and the Harlan J. Smith Telescope at the McDonald Observatory of the University of Texas. Elemental abundances in the range from germanium (Z=32) up to uranium (Z=92) have been determined. The Hubble Space Telescope was used to observe the ultraviolet part of the stellar spectra. This allowed the measurement of platinum, osmium and, for the first time outside of the Solar System, gold. From barium (Z=56) onward, all elements show a pattern of r-process contribution to the abundances of the elements in the Solar system.
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