Английская Википедия:HE 1219-0312

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Шаблон:Short description Шаблон:Notability Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalogue Шаблон:Starbox reference Шаблон:Starbox end HE 1219-0312 is an extremely metal-poor star in the constellation Virgo, The star is located at around 41,400 light years away from earth.[1]

It is thought to be a second generation, Population II or metal-poor star ([Fe/H] = -2.96), The star was found in the sample of extremely metal-poor halo stars from the Hamburg/ESO Survey by W. Hayek and collaborators. The group's research was published in the July 2, 2009 issue of The Astrophysical Journal.[2]

If the age of the star HE 1219-0312 was confirmed at 17.6 billion years, that this star will be the oldest star in the universe.[2]

Elemental abundance

The abundance of two strongly r-process enhanced in two metal-poor stars, BPS CS29491-0069 and HE 1219-0312 was detected by HERES project, which there was ([Fe/H] = -2.51, [r/Fe] = +1.1) and ([Fe/H] = -2.96, [r/Fe] = +1.5).[2]

the analysis based on high-quality VLT/UVES spectra and MARCS model atmosphere was detected these eighteen heavy elements in the spectrum of HE 1219–0312 with an case of Th II 4019A line.[2]

Radioactive dating for HE 1219–0312 with the observed thorium and rare-earth elements abundance pairs results in an average age of 9.5 billion years, when based on solar r-process residuals, that Age of the star HE 1219-0312 was 17.6 billion years, so, we puts the age of HE 1219-0312 into 13.6 billion years to avoid to exceed the universe's age.[2]

See also

References

Шаблон:Reflist

Шаблон:Virgo (constellation)

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  2. 2,0 2,1 2,2 2,3 2,4 Шаблон:Cite journal