000002072 001__ 2072
000002072 005__ 20160701171658.0
000002072 0247_ $$2DOI$$a10.1051/0004-6361:20041444
000002072 037__ $$aASTROimport-229
000002072 100__ $$aUytterhoeven, K.
000002072 245__ $$aDisentangling component spectra of κ Scorpii, a spectroscopic binary with a pulsating primary. II. Interpretation of the line-profile variability
000002072 260__ $$c2005
000002072 520__ $$aWe analyse the complex short-term SiIII line-profile variability of the spectroscopic binary β Cep star κ Scorpii after orbit subtraction, before and after spectral disentangling.  We refine the known oscillation frequency of the star: f1=4.99922 c d-1 and detect 2f1. Variability is also found at frequencies near f2≃ 4.85 c d-1 and f3≃ 5.69 c d-1 or their aliases. These frequencies are not significant if we consider the spectra alone, but they survive our selection after the consideration that they were derived previously from independent ground-based and space photometry by different teams. Moreover, we find dominant variability in the equivalent width with a frequency in the interval [0.22,0.30] c d-1 which we interpret as the rotational frequency frot of the star. The complex window function does not allow us to determine definite values for f2, f3, frot. The variability with f1 is interpreted as a prograde non-radial oscillation mode with spherical wavenumbers (ℓ,m)=(2,-1) or (1,-1). The additional frequencies are explained in terms of rotational modulation superposed to the main oscillation. We also point out that we cannot disprove the variability in κ Scorpii to originate from co-rotating structures. KOREL disentangling preserves the large-amplitude line-profile variability but its performance for complex low-amplitude variability remains to be studied in detail. Based on observations obtained with the Coudé Échelle Spectrograph on the ESO CAT telescope and with the CORALIE échelle spectrograph on the 1.2-m Euler Swiss telescope, both situated at La Silla, Chile. 
000002072 700__ $$a Briquet, M.
000002072 700__ $$a Aerts, C.
000002072 700__ $$a Telting, J. H.
000002072 700__ $$a Harmanec, P.
000002072 700__ $$a Lefever, K.
000002072 700__ $$a Cuypers, J.
000002072 773__ $$c955-967$$i3$$pAstronomy and Astrophysics$$v432$$y2005
000002072 85642 $$ahttp://esoads.eso.org/abs/2005A%26A...432..955U
000002072 905__ $$apublished in
000002072 980__ $$aREFERD