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New findings supporting the presence of a thick disc and bipolar jets in the β Lyrae system
Context. Understanding large-scale mass exchange in binaries also requires studies of complicated objects in the rapid phases of the process. β Lyr is one such object. Aims. Our goals were to analyseExpand
Physical elements of the eclipsing binary δ Orionis
For years, δ Orionis was considered a normal binary with an 09.5 II primary exhibiting apsidal-line advance. However, radial-velocity curves of both binary components have been derived from the IUEExpand
Large distance of ε Aurigae inferred from interstellar absorption and reddening
The long-period (P = 27.1 years) peculiar eclipsing binary e Aur, which has recently completed its two year-long primary eclipse, has perplexed astronomers for over a century. The eclipse arises fromExpand
Pulsations of the Oe Star ζ Ophiuchi from MOST Satellite Photometry and Ground-based Spectroscopy
Twenty-four days of highly precise Microvariability and Oscillations of Stars (MOST) satellite photometry obtained in mid-2004 of the rapidly rotating O9.5 V star ζ Oph have yielded at least a dozenExpand
Implications of Systematic Observations for the Nature of the Multiple System with the Be star o Cassiopeae and its Circumstellar Environment
Abstract : The analysis of radial velocities of the Be star o Cas from spectra taken between 1992 and 2008 at the Ondrejov Observatory and the Dominion Astrophysical Observatory allowed us toExpand
V379 Cephei: a quadruple system of two binaries
Context. Several binaries with masses anomalously small for their observed spectral types have been discussed in the astronomical literature and interpreted as the result of envelope ejection. V379Expand
UBV photometry of Be stars at Hvar : 1972-1990
A summary of results of the systematic UBV photoelectric monitoring of bright northern Be stars carried out at the Hvar Observatory betwen 1972 and 1990 is presented. Altogether, 76 Be stars of allExpand
Spectral and photometric analysis of the eclipsing binary Aurigae prior to and during the 2009-2011 eclipse ,
A series of 353 red electronic spectra (from three observatories, mostly from 6300 to 6700 A) obtained between 1994 and 2010, and of 171 UBV photometric observations (from two observatories) of theExpand
The extremely rapid rotational braking of the magnetic helium-strong star HD 37776
Context. Light and spectrum variations of the magnetic chemically peculiar (mCP) stars are explained by the oblique rigid rotator model with a rotation period usually assumed to be stable on a longExpand