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Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473

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dc.contributor.author Shavrina, A.
dc.contributor.author Polosukhina, N.
dc.contributor.author Khan, S.
dc.contributor.author Pavlenko, Ya.
dc.contributor.author Khalack, V.
dc.contributor.author Wade, G.A.
dc.contributor.author Quine, t P.
dc.contributor.author Mikhailitska, N.
dc.contributor.author Yushchenko, A.
dc.contributor.author Gopka, V.
dc.contributor.author Kudryavtsev, D.
dc.date.accessioned 2015-04-03T17:55:56Z
dc.date.available 2015-04-03T17:55:56Z
dc.date.issued 2005
dc.identifier.citation Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473 / A. Shavrina, N. Polosukhina, S. Khan, Ya. Pavlenko, V. Khalack, G.A. Wade, P. Quinet, N. Mikhailitska, A. Yushchenko, V. Gopka, D. Kudryavtsev // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 295-298. — Бібліогр.: 16 назв. — англ. uk_UA
dc.identifier.issn 0233-7665
dc.identifier.uri http://dspace.nbuv.gov.ua/handle/123456789/79662
dc.description.abstract The lithium lines at 6708 Å for two sharp-lined roAp stars γ Equ and HD 166473 and at 6103 Å for γ Equ were analyzed in high resolution spectra. Three spectral synthesis codes – STARSP, ZEEMAN2, and SYNTHM – were used. New lines of the rare-earth elements from the DREAM database and lines calculated on the basis of the NIST energy levels were included. Magnetic splitting and other line broadening processes were taken into account. Enhanced abundances of lithium in the atmospheres of the stars and high estimates of ⁶Li/⁷Li ratio (0.2 ÷ 0.5) can be explained by the Galactic Cosmic Ray (GCR) production due to spallation reactions and the preservation of original ⁶Li and ⁷Li by strong magnetic fields. uk_UA
dc.description.sponsorship The authors are grateful to Dr. P. North for the ESO spectra and Dr. J. Zverko for the remarks to the manuscript. uk_UA
dc.language.iso en uk_UA
dc.publisher Головна астрономічна обсерваторія НАН України uk_UA
dc.relation.ispartof Кинематика и физика небесных тел
dc.subject MS3: Physics of Stars and Galaxies uk_UA
dc.title Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473 uk_UA
dc.type Article uk_UA
dc.status published earlier uk_UA


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