Radial velocity variations of EN Lac (Lehmann+, 2001)

Details Radial velocity variations of EN Lac (Lehmann+, 2001) Radial velocity variations of EN Lac (Lehmann+, 2001)

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ycat..33670236l&link_type=abstract

VizieR On-line Data Catalog: J/A+A/367/236. Originally published in: 2001A&A...367..236L

Physics

Binaries: Eclipsing, Binaries: Orbits, Binaries: Spectroscopic, Radial Velocities

Scientific paper

An analysis of 1236 new electronic spectra of the eclipsing binary EN Lac from four observatories and of 994 radial velocities (RV hereafter) from photographic spectra, published by several authors, has allowed us to disentangle the RV variations due to orbital motion and due to pulsations of the star. New, accurate orbital elements as well as precise values of the three pulsation periods, already known from the previous studies, were derived. The accuracy of the orbital solution has been substantially improved after the observed RV changes were properly prewhitened for the short-term oscillations. For the first time we present evidence of line profile variations of EN Lac. They correlate well with the short-term RV variations but they alternatively occur with periods corresponding either to the fundamental periods or to the first harmonics of the short-term RV variations. (1 data file).

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