000002003 001__ 2003
000002003 005__ 20160701171657.0
000002003 0247_ $$2DOI$$a10.1111/j.1365-2966.2007.11955.x
000002003 037__ $$aASTROimport-160
000002003 100__ $$aHensberge, H.
000002003 245__ $$aThe eclipsing double-lined binaries V883Cen and η Mus
000002003 260__ $$c2007
000002003 520__ $$aWe derive the orbital period and monitor in detail the eclipses of two deep-southern double-lined eclipsing binaries of considerable interest. We present new uvby photometry over more than 100 nights for V883Cen, scan for the first time the eclipses of η Mus and analyse the data for these two systems together with earlier published photometry. We also add information from high-dispersion spectra. V883Cen consists of two sharp-lined, mid-B-type stars in an orbit of 35.44733 d. The slower rotating component, Prot = 55.215 d, is a chemically peculiar star of the type He-weak SrTi that is partially eclipsed by its slightly more massive companion. Owing to the high eccentricity of the orbit and its orientation, only one eclipse occurs. The orbital period of η Mus is 57.5 h, rather than the 20 d quoted up to the present in the literature. That close binary, consisting of two late-B-type stars, shows identical partial eclipses. Interest in the close binary is triggered by the pre-main-sequence companion at 2.7 arcsec. HD118978, one of the comparison stars used for V883Cen, is identified as a new variable. This fast-rotating B9 (sub)giant belongs presumably to the class of slowly pulsating B-type stars. Based on observations obtained at the European Southern Observatory (ESO), La Silla, Chile, and at the South African Astronomical Observatory (SAAO), Sutherland, South Africa. E-mail: herman@oma.be  ‡ Research Director, Belgian Fund for Scientific Research (FWO). 
000002003 700__ $$a Nitschelm, C.
000002003 700__ $$a Olsen, E. H.
000002003 700__ $$a Sterken, C.
000002003 700__ $$a David, M.
000002003 700__ $$a Freyhammer, L. M.
000002003 700__ $$a Landin, N. R.
000002003 700__ $$a Bouzid, M. Y.
000002003 700__ $$a Papadaki, C.
000002003 700__ $$a Pritchard, J. D.
000002003 700__ $$a Clausen, J. V.
000002003 700__ $$a Vaz, L. P. R.
000002003 773__ $$c349-356$$i1$$pMonthly Notices of the Royal Astronomical Society$$v379$$y2007
000002003 85642 $$ahttp://esoads.eso.org/abs/2007MNRAS.379..349H
000002003 905__ $$apublished in
000002003 980__ $$aREFERD