134 citations · 242 across the 8 of their papers we have counts for
8 papers
A new study of the spectroscopic binary 7 Vul with a Be star primary
P. Harmanec, J. Lipták, P. Koubský +5
We confirmed the binary nature of the Be star 7~Vul, derived a~more accurate spectroscopic orbit with an orbital period of (69.4212+/-0.0034) d, and improved the knowledge of the b…
A new look into putative duplicity and pulsations of the Be star CMi
P. Harmanec, M. Svanda, D. Korcakova +6
Bright Be star beta CMi has been identified as a non-radial pulsator on the basis of space photometry with the MOST satellite and also as a single-line spectroscopic binary with a…
Revised physical elements of the astrophysically important O9.5+O9.5V eclipsing binary system Y Cyg
P. Harmanec, D. E. Holmgren, M. Wolf +11
Thanks to its long and rich observational history and rapid apsidal motion, the massive eclipsing binary Y Cyg represents one of the cornestones to critical tests of stellar evolut…
V2368 Oph: An eclipsing and double-lined spectroscopic binary used as a photometric comparison star for U Oph
P. Harmanec, H. Božić, P. Mayer +8
The A-type star HR 6412 = V2368 Oph was used by several investigators as a photometric comparison star for the known eclipsing binary U Oph but was found to be variable by three in…
UX Monocerotis as a W Serpentis binary
D. Sudar, P. Harmanec, H. Lehmann +3
Using our new photometric and spectroscopic observations as well as all available published data, we present a new interpretation of the properties of the peculiar emission-line bi…
Chemical evolution of high-mass stars in close binaries. II. The evolved component of the eclipsing binary V380 Cygni
K. Pavlovski, E. Tamajo, P. Koubsky +3
The eclipsing and double-lined spectroscopic binary V380 Cyg is an extremely important probe of stellar evolution: its primary component is a high-mass star at the brink of leaving…
Confirmation of the Planet Hypothesis for the Long-period Radial Velocity Variations of Beta Geminorum
A. P. Hatzes, W. D. Cochran, M. Endl E. W. Guenther +6
We present precise stellar radial velocity measurements for the K giant star Beta Gem spanning over 25 years. These data show that the long period low amplitude radial velocity var…
Abundances from disentangled component spectra of close binary stars: An observational test of an earlz mixing in high-mass stars
K. Pavlovski, D. E. Holmgren, P. Koubsky +2
Recent theoretical calculations of stellar evolutionary tracks for rotating high-mass stars suggests that the chemical composition of the surface layers changes even whilst the sta…