| Форма представления | Статьи в зарубежных журналах и сборниках |
| Год публикации | 2015 |
| Язык | русский |
|
Галеев Алмаз Ильсурович, автор
|
| Библиографическое описание на языке оригинала |
M. Yılmaz, I. Bikmaev, B. Sato, S.O. Selama, A.I. Galeev, V. Keskin, H. Izumiura, E.N. Irtuganov, E. Kambe, I. Özavcı, S.S. Melnikov, R.Ya. Zhuchkov, N. Okada Low mass stellar companions around four giant stars // New Astronomy, 2015, v. 34, p. 108-113. |
| Аннотация |
We present three low-mass and one solar mass companions found around four intermediate-mass giants HD1695, HD120235, HD145316 and HD200004 from precise radial velocity measurements using the 1.5 m Russian-Turkish Telescope (RTT150) at the TÜBİTAK National Observatory of Turkey (TUG). The stellar parameters, which are effective temperature (Teff), surface gravity (logg) and metallicity ([Fe/H]), as well as rotational velocity (vsini) are obtained from spectral analysis. From the estimated stellar masses, the orbital parameters of the companions are also derived. We find two types of Keplerian solutions for the companion of HD120235: (1) periods 5522 days and eccentricity of e∼0.93, and (2) periods 1566 days and eccentricity of e∼0.83. From the abundances analysis HD1695 is found to be a metal-rich star with [Fe/H]>0.1, while HD200004 is a metal poor star with [Fe/H]<-0.2. The other two stars, HD120235 and HD145316, have solar-like abundances with [Fe/H]∼0.0. Our stellar parameters and orbital solutions show that all of these stars are evolved intermediate-mass giants. |
| Ключевые слова |
Stars: individual
Stars: abundances
Techniques: radial velocities
Miscellaneous: binary |
| Название журнала |
New Astronomy
|
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https://repository.kpfu.ru/?p_id=84789 |
Полная запись метаданных  |
| Поле DC |
Значение |
Язык |
| dc.contributor.author |
Галеев Алмаз Ильсурович |
ru_RU |
| dc.date.accessioned |
2015-01-01T00:00:00Z |
ru_RU |
| dc.date.available |
2015-01-01T00:00:00Z |
ru_RU |
| dc.date.issued |
2015 |
ru_RU |
| dc.identifier.citation |
M. Yılmaz, I. Bikmaev, B. Sato, S.O. Selama, A.I. Galeev, V. Keskin, H. Izumiura, E.N. Irtuganov, E. Kambe, I. Özavcı, S.S. Melnikov, R.Ya. Zhuchkov, N. Okada Low mass stellar companions around four giant stars // New Astronomy, 2015, v. 34, p. 108-113. |
ru_RU |
| dc.identifier.uri |
https://repository.kpfu.ru/?p_id=84789 |
ru_RU |
| dc.description.abstract |
New Astronomy |
ru_RU |
| dc.description.abstract |
We present three low-mass and one solar mass companions found around four intermediate-mass giants HD1695, HD120235, HD145316 and HD200004 from precise radial velocity measurements using the 1.5 m Russian-Turkish Telescope (RTT150) at the TÜBİTAK National Observatory of Turkey (TUG). The stellar parameters, which are effective temperature (Teff), surface gravity (logg) and metallicity ([Fe/H]), as well as rotational velocity (vsini) are obtained from spectral analysis. From the estimated stellar masses, the orbital parameters of the companions are also derived. We find two types of Keplerian solutions for the companion of HD120235: (1) periods 5522 days and eccentricity of e∼0.93, and (2) periods 1566 days and eccentricity of e∼0.83. From the abundances analysis HD1695 is found to be a metal-rich star with [Fe/H]>0.1, while HD200004 is a metal poor star with [Fe/H]<-0.2. The other two stars, HD120235 and HD145316, have solar-like abundances with [Fe/H]∼0.0. Our stellar parameters and orbital solutions show that all of these stars are evolved intermediate-mass giants. |
ru_RU |
| dc.language.iso |
ru |
ru_RU |
| dc.subject |
|
ru_RU |
| dc.title |
Маломассивные компоненты четырех звезд-гигантов |
ru_RU |
| dc.type |
Статьи в зарубежных журналах и сборниках |
ru_RU |
|
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