000002158 001__ 2158
000002158 005__ 20200114151718.0
000002158 0247_ $$2DOI$$a10.1093/mnras/stt2466
000002158 037__ $$aASTROimport-315
000002158 100__ $$aSódor, Á.
000002158 245__ $$aExtensive study of HD 25558, a long-period double-lined binary with two SPB components
000002158 260__ $$c2014
000002158 520__ $$aWe carried out an extensive observational study of the Slowly Pulsating B (SPB) star, HD 25558. The ≈2000 spectra obtained at different observatories, the ground-based and MOST satellite light curves revealed that this object is a double-lined spectroscopic binary with an orbital period of about nine years. The observations do not allow the inference of an orbital solution. We determined the physical parameters of the components, and found that both lie within the SPB instability strip. Accordingly, both show line-profile variations due to stellar pulsations. 11 independent frequencies were identified in the data. All the frequencies were attributed to one of the two components based on pixel-by-pixel variability analysis of the line profiles. Spectroscopic and photometric mode identification was also performed for the frequencies of both stars. These results suggest that the inclination and rotation of the two components are rather different. The primary is a slow rotator with ≈6 d period, seen at ≈60° inclination, while the secondary rotates fast with ≈1.2 d period, and is seen at ≈20° inclination. Spectropolarimetric measurements revealed that the secondary component has a magnetic field with at least a few hundred Gauss strength, while no magnetic field can be detected in the primary.
000002158 700__ $$aDe Cat, P.
000002158 700__ $$aWright, D. J.
000002158 700__ $$aNeiner, C.
000002158 700__ $$aBriquet, M.
000002158 700__ $$aLampens, P.
000002158 700__ $$aDukes, R. J.
000002158 700__ $$aHenry, G. W.
000002158 700__ $$aWilliamson, M. H.
000002158 700__ $$aBrunsden, E.
000002158 700__ $$aPollard, K. R.
000002158 700__ $$aCottrell, P. L.
000002158 700__ $$aMaisonneuve, F.
000002158 700__ $$aKilmartin, P. M.
000002158 700__ $$aMatthews, J.
000002158 700__ $$aKallinger, T.
000002158 700__ $$aBeck, P. G.
000002158 700__ $$aKambe, E.
000002158 700__ $$aEngelbrecht, C. A.
000002158 700__ $$aCzanik, R. J.
000002158 700__ $$aYang, S.
000002158 700__ $$aHashimoto, O.
000002158 700__ $$aHonda, S.
000002158 700__ $$aFu, J. N.
000002158 700__ $$aCastanheira, B.
000002158 700__ $$aLehmann, H.
000002158 700__ $$aBognár, Z.
000002158 700__ $$aBehara, N.
000002158 700__ $$aScaringi, S.
000002158 700__ $$aVan Winckel, H.
000002158 700__ $$aMenu, J.
000002158 700__ $$aLobel, A.
000002158 700__ $$aMathias, P.
000002158 700__ $$aSaesen, S.
000002158 700__ $$aVuckovic, M.
000002158 700__ $$aMiMeS Collaboration
000002158 773__ $$c3535-3556$$i4$$pMonthly Notices of the Royal Astronomical Society$$v438$$y2014
000002158 85642 $$ahttp://esoads.eso.org/abs/2014MNRAS.438.3535S
000002158 905__ $$apublished in
000002158 980__ $$aREFERD