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Low mass stellar companions around four giant stars

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dc.contributor.author Yilmaz M.
dc.contributor.author Bikmaev I.
dc.contributor.author Sato B.
dc.contributor.author Selam S.
dc.contributor.author Galeev A.
dc.contributor.author Keskin V.
dc.contributor.author Izumiura H.
dc.contributor.author Irtuganov E.
dc.contributor.author Kambe E.
dc.contributor.author Özavci I.
dc.contributor.author Melnikov S.
dc.contributor.author Zhuchkov R.
dc.contributor.author Okada N.
dc.date.accessioned 2018-09-18T20:22:06Z
dc.date.available 2018-09-18T20:22:06Z
dc.date.issued 2015
dc.identifier.issn 1384-1076
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/139148
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 TÜBITAK 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. © 2014 Elsevier B.V. All rights reserved.
dc.relation.ispartofseries New Astronomy
dc.subject Miscellaneous: binary
dc.subject Stars: abundances
dc.subject Stars: individual
dc.subject Techniques: radial velocities
dc.title Low mass stellar companions around four giant stars
dc.type Article
dc.relation.ispartofseries-volume 34
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 108
dc.source.id SCOPUS13841076-2015-34-SID84903955023


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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