Low mass stellar companions around four giant stars

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dc.contributor.authorYilmaz, M.
dc.contributor.authorBikmaev, I.
dc.contributor.authorSato, B.
dc.contributor.authorSelam, S. O.
dc.contributor.authorGaleev, A. I.
dc.contributor.authorKeskin, V.
dc.contributor.authorIzumiura, H.
dc.contributor.authorIrtuganov, E. N.
dc.contributor.authorKambe, E.
dc.contributor.authorOzavci, I.
dc.contributor.authorMelnikov, S. S.
dc.contributor.authorZhuchkov, R. Ya.
dc.contributor.authorOkada, N.
dc.date.accessioned2019-10-27T22:12:21Z
dc.date.available2019-10-27T22:12:21Z
dc.date.issued2015
dc.departmentEge Üniversitesien_US
dc.description.abstractWe 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 (RTF150) at the TUBITAK National Observatory of Turkey (TUG). The stellar parameters, which are effective temperature (T-eff), 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 similar to 0.93, and (2) periods 1566 days and eccentricity of e similar to 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] similar to 0.0. Our stellar parameters and orbital solutions show that all of these stars are evolved intermediate-mass giants. (C) 2014 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [BIDEB-2218]; RFBRRussian Foundation for Basic Research (RFBR) [13-02-00351, 12-02-00185, 12-02-97006-r-povolzhie]; TUBITAK National Observatory (TUG)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK); KFUen_US
dc.description.sponsorshipMY would like to thank The Scientific and Technological Research Council of Turkey (TUBITAK) for the support by BIDEB-2218 post-doctoral research scholarship. This work has been partially supported by RFBR projects 13-02-00351, 12-02-00185, 12-02-97006-r-povolzhie. Authors would like to thank TUBITAK National Observatory (TUG) and KFU for supports in using RTT150 (Russian-Turkish 1.5-m telescope in Antalya). The authors acknowledge the use of the Simbad database, operated at the CDS, Strasbourg, France, and of NASA's Astrophysics Data System Bibliographic Services.en_US
dc.identifier.doi10.1016/j.newast.2014.06.005
dc.identifier.endpage113en_US
dc.identifier.issn1384-1076
dc.identifier.issn1384-1092
dc.identifier.issn1384-1076en_US
dc.identifier.issn1384-1092en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage108en_US
dc.identifier.urihttps://doi.org/10.1016/j.newast.2014.06.005
dc.identifier.urihttps://hdl.handle.net/11454/49380
dc.identifier.volume34en_US
dc.identifier.wosWOS:000342530900013en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Bven_US
dc.relation.ispartofNew Astronomyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectStars: individualen_US
dc.subjectStars: abundancesen_US
dc.subjectTechniques: radial velocitiesen_US
dc.subjectMiscellaneous: binaryen_US
dc.titleLow mass stellar companions around four giant starsen_US
dc.typeArticleen_US

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