CHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRA
Four high-resolution spectra of the doble-mode Cepheid UTrA have been obtained during its pulsational period. For the first time, we obtained accurate atmosphere parameters and the chemical abundance of a number of elements, in particular of sodium, magnesium, and aluminium. We estimated the mean Teff...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Odessa I. I. Mechnykov National University
2013-11-01
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| Series: | Odessa Astronomical Publications |
| Online Access: | http://oap.onu.edu.ua/article/view/82357 |
| _version_ | 1818325770613817344 |
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| author | I. A. Usenko A. Yu. Knyazev L. N. Berdnikov V. V. Kravtsov |
| author_facet | I. A. Usenko A. Yu. Knyazev L. N. Berdnikov V. V. Kravtsov |
| author_sort | I. A. Usenko |
| collection | DOAJ |
| description | Four high-resolution spectra of the doble-mode Cepheid UTrA have been obtained during its pulsational period. For the first time, we obtained accurate atmosphere parameters and the chemical abundance of a number of elements, in particular of sodium, magnesium, and aluminium. We estimated the mean Teff =608529K, logg=2.000.15, and Vt =3.900.25kms 1. A deficit of carbon ([C=H] =–0.350.23dex), over abundance of both sodium ([Na=H]=+0.150.25dex) and aluminium ([Al=H]
=+0.300.32dex) are typical for Cepheids passing through the first dredge-upphase. The abundance of iron ([Fe=H]=+0.010.15dex) is very close to the solar one. Moreover, we find that -elements, those of Fe-group, as well as ”light” - and ”heavy”-, s- and r- process elements, all of them have abundances close to solar values, too, excepting may be severale lements with slight enhance or deficit. |
| first_indexed | 2024-12-13T11:49:46Z |
| format | Article |
| id | doaj.art-9fc17f860f244893b96a207549dc1283 |
| institution | Directory Open Access Journal |
| issn | 1810-4215 |
| language | English |
| last_indexed | 2024-12-13T11:49:46Z |
| publishDate | 2013-11-01 |
| publisher | Odessa I. I. Mechnykov National University |
| record_format | Article |
| series | Odessa Astronomical Publications |
| spelling | doaj.art-9fc17f860f244893b96a207549dc12832022-12-21T23:47:25ZengOdessa I. I. Mechnykov National UniversityOdessa Astronomical Publications1810-42152013-11-0126112713010.18524/1810-4215.2013.26.8235782357CHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRAI. A. Usenko0A. Yu. KnyazevL. N. BerdnikovV. V. KravtsovDepartment of Astronomy, Odessa National UniversityFour high-resolution spectra of the doble-mode Cepheid UTrA have been obtained during its pulsational period. For the first time, we obtained accurate atmosphere parameters and the chemical abundance of a number of elements, in particular of sodium, magnesium, and aluminium. We estimated the mean Teff =608529K, logg=2.000.15, and Vt =3.900.25kms 1. A deficit of carbon ([C=H] =–0.350.23dex), over abundance of both sodium ([Na=H]=+0.150.25dex) and aluminium ([Al=H] =+0.300.32dex) are typical for Cepheids passing through the first dredge-upphase. The abundance of iron ([Fe=H]=+0.010.15dex) is very close to the solar one. Moreover, we find that -elements, those of Fe-group, as well as ”light” - and ”heavy”-, s- and r- process elements, all of them have abundances close to solar values, too, excepting may be severale lements with slight enhance or deficit.http://oap.onu.edu.ua/article/view/82357 |
| spellingShingle | I. A. Usenko A. Yu. Knyazev L. N. Berdnikov V. V. Kravtsov CHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRA Odessa Astronomical Publications |
| title | CHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRA |
| title_full | CHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRA |
| title_fullStr | CHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRA |
| title_full_unstemmed | CHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRA |
| title_short | CHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRA |
| title_sort | chemical composition and atmosphere parameters of the double mode cepheid u tra |
| url | http://oap.onu.edu.ua/article/view/82357 |
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