J/A+A/367/236 Radial velocity variations of EN Lac (Lehmann+, 2001)
A new analysis of the radial-velocity variations of the eclipsing and
spectroscopic binary EN Lacertae
Lehmann H., Harmanec P., Aerts C, Bozic H., Eenens P., Hildebrandt G.,
Holmgren D., Mathias P., Scholz G., Slechta M., Yang S.
<Astron. Astrophys. 367, 236 (2001)>
=2001A&A...367..236L 2001A&A...367..236L
ADC_Keywords: Binaries, eclipsing ; Binaries, orbits ; Binaries, spectroscopic ;
Radial velocities
Keywords: stars: binaries: close - stars: binaries: eclipsing -
stars: binaries: spectroscopic - stars: fundamental parameters -
stars: oscillations - stars: individual: EN Lac
Abstract:
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.
Objects:
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RA (2000) DE Designation(s)
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22 56 23.6 +41 36 14 EN Lac = 16 Lac = HD 216916
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 22 1236 New radial velocities of EN Lac
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See also:
J/A+A/304/406 : Photometry and radial velocities of 16 Lac (Chapellier+, 1995)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
14- 19 F6.2 km/s RV Radial velocity
21- 22 I2 --- Source See Note (1)
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Note (1): Column "Source" is identical with column "set" in Table 2 of the
printed paper which gives the detailed journal of observations.
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Acknowledgements: Holger Lehmann
(End) Patricia Bauer [CDS] 31-Jan-2001