Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473
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...
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| Видавець: | Головна астрономічна обсерваторія НАН України |
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| Дата: | 2005 |
| Автори: | , , , , , , , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Головна астрономічна обсерваторія НАН України
2005
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| Назва видання: | Кинематика и физика небесных тел |
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/79662 |
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| Цитувати: | 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. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
irk-123456789-79662 |
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irk-123456789-796622015-04-04T03:02:11Z Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473 Shavrina, A. Polosukhina, N. Khan, S. Pavlenko, Ya. Khalack, V. Wade, G.A. Quine, t P. Mikhailitska, N. Yushchenko, A. Gopka, V. Kudryavtsev, D. MS3: Physics of Stars and Galaxies 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. 2005 Article 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. 0233-7665 http://dspace.nbuv.gov.ua/handle/123456789/79662 en Кинематика и физика небесных тел Головна астрономічна обсерваторія НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
MS3: Physics of Stars and Galaxies MS3: Physics of Stars and Galaxies |
| spellingShingle |
MS3: Physics of Stars and Galaxies MS3: Physics of Stars and Galaxies Shavrina, A. Polosukhina, N. Khan, S. Pavlenko, Ya. Khalack, V. Wade, G.A. Quine, t P. Mikhailitska, N. Yushchenko, A. Gopka, V. Kudryavtsev, D. Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473 Кинематика и физика небесных тел |
| description |
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. |
| format |
Article |
| author |
Shavrina, A. Polosukhina, N. Khan, S. Pavlenko, Ya. Khalack, V. Wade, G.A. Quine, t P. Mikhailitska, N. Yushchenko, A. Gopka, V. Kudryavtsev, D. |
| author_facet |
Shavrina, A. Polosukhina, N. Khan, S. Pavlenko, Ya. Khalack, V. Wade, G.A. Quine, t P. Mikhailitska, N. Yushchenko, A. Gopka, V. Kudryavtsev, D. |
| author_sort |
Shavrina, A. |
| title |
Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473 |
| title_short |
Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473 |
| title_full |
Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473 |
| title_fullStr |
Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473 |
| title_full_unstemmed |
Lithium and its isotopic ratio ⁶Li/⁷Li in the atmospheres of sharp-lined roAp stars γ Equulei and HD 166473 |
| title_sort |
lithium and its isotopic ratio ⁶li/⁷li in the atmospheres of sharp-lined roap stars γ equulei and hd 166473 |
| publisher |
Головна астрономічна обсерваторія НАН України |
| publishDate |
2005 |
| topic_facet |
MS3: Physics of Stars and Galaxies |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/79662 |
| citation_txt |
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. |
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Кинематика и физика небесных тел |
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