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- BD_+17°_3248 abstract "BD +17° 3248 is an old Population II star located at a distance of roughly 968 light-years (297 parsecs) 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, this star had been studied with 3 telescopes: a) the Hubble Space Telescope, b) the Keck I telescope and c) 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) were 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.The University of Mainz and University of Basel groups of Karl-Ludwig Kratz and Friedrich-Karl Thielemann performed a comparison between the observed abundances for the stable element europium (Z=63) and the radioactive elements thorium (Z=90) and uranium (Z=92) to the calculated abundances of an r-process in a Type II supernova explosion. This allowed the age of this star to be estimated as about 13.8 billion years with an uncertainty of 4 billion years. A similar age was derived for another ultra-metal-poor star (CS31082-001) from Thorium to uranium ratios. These stars were born several hundred million years after the Big Bang.".
- BD_+17°_3248 wikiPageExternalLink ages.html.
- BD_+17°_3248 wikiPageExternalLink msu-adg011002.php.
- BD_+17°_3248 wikiPageID "4811261".
- BD_+17°_3248 wikiPageLength "6426".
- BD_+17°_3248 wikiPageOutDegree "36".
- BD_+17°_3248 wikiPageRevisionID "690101638".
- BD_+17°_3248 wikiPageWikiLink Abundance_of_the_chemical_elements.
- BD_+17°_3248 wikiPageWikiLink Barium.
- BD_+17°_3248 wikiPageWikiLink Big_Bang.
- BD_+17°_3248 wikiPageWikiLink Category:Durchmusterung_objects.
- BD_+17°_3248 wikiPageWikiLink Category:Hercules_(constellation).
- BD_+17°_3248 wikiPageWikiLink Category:K-type_bright_giants.
- BD_+17°_3248 wikiPageWikiLink Category:Population_II_stars.
- BD_+17°_3248 wikiPageWikiLink Cayrels_Star.
- BD_+17°_3248 wikiPageWikiLink Europium.
- BD_+17°_3248 wikiPageWikiLink Friedrich-Karl_Thielemann.
- BD_+17°_3248 wikiPageWikiLink Galactic_halo.
- BD_+17°_3248 wikiPageWikiLink Germanium.
- BD_+17°_3248 wikiPageWikiLink Gold.
- BD_+17°_3248 wikiPageWikiLink Harlan_J._Smith_Telescope.
- BD_+17°_3248 wikiPageWikiLink Hercules_(constellation).
- BD_+17°_3248 wikiPageWikiLink Hipparcos.
- BD_+17°_3248 wikiPageWikiLink Hubble_Space_Telescope.
- BD_+17°_3248 wikiPageWikiLink Karl-Ludwig_Kratz.
- BD_+17°_3248 wikiPageWikiLink McDonald_Observatory.
- BD_+17°_3248 wikiPageWikiLink Metallicity.
- BD_+17°_3248 wikiPageWikiLink Osmium.
- BD_+17°_3248 wikiPageWikiLink Platinum.
- BD_+17°_3248 wikiPageWikiLink R-process.
- BD_+17°_3248 wikiPageWikiLink Star.
- BD_+17°_3248 wikiPageWikiLink Star_catalogue.
- BD_+17°_3248 wikiPageWikiLink Stellar_population.
- BD_+17°_3248 wikiPageWikiLink Thorium.
- BD_+17°_3248 wikiPageWikiLink Type_II_supernova.
- BD_+17°_3248 wikiPageWikiLink Ultraviolet.
- BD_+17°_3248 wikiPageWikiLink University_of_Basel.
- BD_+17°_3248 wikiPageWikiLink University_of_Mainz.
- BD_+17°_3248 wikiPageWikiLink University_of_Texas_at_Austin.
- BD_+17°_3248 wikiPageWikiLink Uranium.
- BD_+17°_3248 wikiPageWikiLink W._M._Keck_Observatory.
- BD_+17°_3248 wikiPageWikiLinkText "BD +17° 3248".
- BD_+17°_3248 wikiPageWikiLinkText "Kratz's Star".
- BD_+17°_3248 absmagV "+".
- BD_+17°_3248 appmagV "9.37".
- BD_+17°_3248 bV "+0.66".
- BD_+17°_3248 class "KII vw".
- BD_+17°_3248 constell Hercules_(constellation).
- BD_+17°_3248 epoch "J2000".
- BD_+17°_3248 gravity "2.3".
- BD_+17°_3248 mass "0.55".
- BD_+17°_3248 metalFe "–2.02".
- BD_+17°_3248 pError "1.77".
- BD_+17°_3248 parallax "3.37".
- BD_+17°_3248 propMoDec "–23.51".
- BD_+17°_3248 propMoRa "–46.61".
- BD_+17°_3248 radialV "–146.55".
- BD_+17°_3248 uB "+0.08".
- BD_+17°_3248 wikiPageUsesTemplate Template:Convert.
- BD_+17°_3248 wikiPageUsesTemplate Template:DEC.
- BD_+17°_3248 wikiPageUsesTemplate Template:RA.
- BD_+17°_3248 wikiPageUsesTemplate Template:Reflist.
- BD_+17°_3248 wikiPageUsesTemplate Template:Starbox_astrometry.
- BD_+17°_3248 wikiPageUsesTemplate Template:Starbox_begin.
- BD_+17°_3248 wikiPageUsesTemplate Template:Starbox_catalog.
- BD_+17°_3248 wikiPageUsesTemplate Template:Starbox_character.
- BD_+17°_3248 wikiPageUsesTemplate Template:Starbox_detail.
- BD_+17°_3248 wikiPageUsesTemplate Template:Starbox_end.
- BD_+17°_3248 wikiPageUsesTemplate Template:Starbox_observe.
- BD_+17°_3248 wikiPageUsesTemplate Template:Stars_of_Hercules.
- BD_+17°_3248 wikiPageUsesTemplate Template:Val.
- BD_+17°_3248 subject Category:Durchmusterung_objects.
- BD_+17°_3248 subject Category:Hercules_(constellation).
- BD_+17°_3248 subject Category:K-type_bright_giants.
- BD_+17°_3248 subject Category:Population_II_stars.
- BD_+17°_3248 hypernym Star.
- BD_+17°_3248 type CelestialBody.
- BD_+17°_3248 type Place.
- BD_+17°_3248 type Star.
- BD_+17°_3248 type Catalogue.
- BD_+17°_3248 type Redirect.
- BD_+17°_3248 type Survey.
- BD_+17°_3248 type Location.
- BD_+17°_3248 type Place.
- BD_+17°_3248 type Thing.
- BD_+17°_3248 comment "BD +17° 3248 is an old Population II star located at a distance of roughly 968 light-years (297 parsecs) 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, this star had been studied with 3 telescopes: a) the Hubble Space Telescope, b) the Keck I telescope and c) the Harlan J. Smith Telescope at the McDonald Observatory of the University of Texas.".
- BD_+17°_3248 label "BD +17° 3248".
- BD_+17°_3248 sameAs Q795778.
- BD_+17°_3248 sameAs BD_+17°_3248.
- BD_+17°_3248 sameAs بیدی_+۱۷°_۳۲۴۸.
- BD_+17°_3248 sameAs m.0cp7wt.
- BD_+17°_3248 sameAs Q795778.
- BD_+17°_3248 wasDerivedFrom BD_+17°_3248?oldid=690101638.
- BD_+17°_3248 isPrimaryTopicOf BD_+17°_3248.
- BD_+17°_3248 name "BD +17° 3248".