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Tracing CNO Exposed Layers in the Hot Algol-Type Binary System 68 Her

  • A. Dervişoğlu (a1), K. Pavlovski (a2), V. Kolbas (a2) and J. Southworth (a3)

Abstract

We present a spectroscopc study of the hot Algol-type system u Her (68 Her, B2 IV + B8 III). A new set of high-resolution échelle spectra has been obtained at Calar Alto Observatory. Spectral disentangling allowed isolation of the individual spectra of the components. A detailed spectroscopic analysis of the primary star indicates an abundance pattern resulting from CNO processing.

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[1]1Asplund, M., Grevesse, N., Sauval, A.J., & Scott, P., 2009, ARA&A, 47, 481
[2]2Eaton, J.A., 1978, Acta Astron., 28, 601
[3]3Hilditch, R.W., 1984, MNRAS, 211, 943
[4]4İbanoǧlu, C., Dervişoğlu, A., Çakırlı, Ö., Sipahi, E., & Yüce, K., 2012, MNRAS, 419, 1472
[5]5Pavlovski, K., Tamajo, E., Koubský, P., et al., 2009, MNRAS, 400, 791
[6]6Sarna, M., & de Greve, J.-P., 1986, A&A, QJRAS, 37, 11
[7]7Tamajo, E., Pavlovski, K., & Southworth, J., 2011, A&A, 526, A76
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