KFU. Card publication. Маломассивные компоненты четырех звезд-гигантов

KAZAN
FEDERAL UNIVERSITY

- RUS
- 中文
- ES

МАЛОМАССИВНЫЕ КОМПОНЕНТЫ ЧЕТЫРЕХ ЗВЕЗД-ГИГАНТОВ

Form of presentation

Articles in international journals and collections

Year of publication

2015

Язык

русский

Authors, employees of KFU

Galeev Almaz Ilsurovich, author

Bibliographic description in the original language

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.

Annotation

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.

Keywords

Stars: individual Stars: abundances Techniques: radial velocities Miscellaneous: binary

The name of the journal

New Astronomy

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=84789&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Galeev Almaz Ilsurovich	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/eng/?p_id=84789&p_lang=2	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	Articles in international journals and collections	ru_RU