J/A+A/312/879 J/A+A/312/879 Beta Lyr radial velocities and UBV data P Harmanec F Morand D Bonneau Y Jiang S Yang E F Guinan D S Hall D Mourard P Hadrava H Bozic C Sterken I Tallon-Bosc G A H Walker G P McCook F Vakili P Stee J M Le Contel Astron. Astrophys. 312 879 1996 1996A&A...312..879H Binaries, eclipsing Radial velocities Photometry, UBV stars: emission-line, Be binaries: eclipsing Stars: individual: beta Lyr techniques: interferometric A preliminary analysis of an extensive collection of interferometric, spectroscopic and photometric observations of the bright Be star {beta} Lyr lead to the following main conclusions: (1) The bulk of the H{alpha} and He I 6678 emission seems to originate in jets of material perpendicular to the orbital plane of the binary. The jets are associated with the more massive component of the binary (star 1) and probably emanate from the `hot spot' in the disk, i.e. the region of interaction of the gas stream flowing from the Roche-lobe filling B6-8II component (star 2) toward star 1. Some contribution to the emission also comes from a region located between the two stars (the gas stream and the `hot spot') and from the `pseudoatmosphere' of the accretion disk around star 1. (2) The 282-d cyclic variation of the light curve of {beta} Lyr is confirmed on the basis of 2852 homogenized V-band observations covering an interval of 36yrs. We find, however, that the amplitude and phase of these variations vary with the orbital phase: the long-term modulation of the light curve almost disappears near orbital phases 0.25P and 0.50P (elongation and secondary eclipse). (3) Pronounced line-profile variations of the H{alpha} and He I 6678 lines on a time scale shorter than one orbital period were clearly detected. They may be periodic, with a period near 4.70-4.75d, and this periodicity may be related to the 282-d change via the orbital period.

Beta LyrHD 17463818 50 04.7+33 21 45.7

No File number --- HJD Heliocentric julian date d cycle Cycle d RVem Radial velocity of emission wings number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVpV Radial velocity of V (violet) peak number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVpR Radial velocity of R (red) peak number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVabs Radial velocity of absorption component number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVstar2 Mean stellar velocity of star2 km/s No File number --- HJD Heliocentric julian date d cycle Cycle d RVem Radial velocity of emission wings number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVabs1 Radial vel. of peak main absorption number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVabs2 Radial vel. of peak main absorption number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVabs3 Radial vel. of peak main absorption number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVstar2 Mean stellar velocity of star2 number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVabs4 Radial vel. of other absorption number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVabs5 Radial vel. of other absorption number=1 The value 9999. denotes missing items, no measurements was possible. km/s No File number --- HJD Heliocentric julian date d cycle Cycle d RVe Radial velocity of emission wings km/s RVpV Radial velocity of V peak km/s RVpR Radial velocity of R peak km/s RVabs1 Radial velocity of absorption component 1 km/s RVstar2 Mean stellar velocity of star2 number=1 The value 9999. denotes missing items, no measurements was possible. km/s RVabs2 Radial vel. of absorption component 2 number=1 The value 9999. denotes missing items, no measurements was possible. km/s sat.abs Radial vel. of satellite absorption number=1 The value 9999. denotes missing items, no measurements was possible. km/s Name Star name --- HJD Heliocentric julian date d w Weight of the observation --- Vmag V magnitude number=1 The value 99.999 denotes missing items, no measurements was possible. Comparison stars used: -------------------------------------------------------------------- HD star V B-V U-B -------------------------------------------------------------------- 172044 HR 6997 5.423 -.094 -.518 176437 Gamma Lyr 3.253 -.071 -.052 174585 8 Lyr 5.929 -.142 -.715 -------------------------------------------------------------------- mag Bmag B magnitude number=1 The value 99.999 denotes missing items, no measurements was possible. Comparison stars used: -------------------------------------------------------------------- HD star V B-V U-B -------------------------------------------------------------------- 172044 HR 6997 5.423 -.094 -.518 176437 Gamma Lyr 3.253 -.071 -.052 174585 8 Lyr 5.929 -.142 -.715 -------------------------------------------------------------------- mag Umag U magnitude number=1 The value 99.999 denotes missing items, no measurements was possible. Comparison stars used: -------------------------------------------------------------------- HD star V B-V U-B -------------------------------------------------------------------- 172044 HR 6997 5.423 -.094 -.518 176437 Gamma Lyr 3.253 -.071 -.052 174585 8 Lyr 5.929 -.142 -.715 -------------------------------------------------------------------- mag B-V B-V color number=1 The value 99.999 denotes missing items, no measurements was possible. Comparison stars used: -------------------------------------------------------------------- HD star V B-V U-B -------------------------------------------------------------------- 172044 HR 6997 5.423 -.094 -.518 176437 Gamma Lyr 3.253 -.071 -.052 174585 8 Lyr 5.929 -.142 -.715 -------------------------------------------------------------------- mag U-B U-B color number=1 The value 99.999 denotes missing items, no measurements was possible. Comparison stars used: -------------------------------------------------------------------- HD star V B-V U-B -------------------------------------------------------------------- 172044 HR 6997 5.423 -.094 -.518 176437 Gamma Lyr 3.253 -.071 -.052 174585 8 Lyr 5.929 -.142 -.715 -------------------------------------------------------------------- mag HDcomp Name of the comparison star --- Site Site (see note4 file) --- Patricia Bauer CDS 1996Apr11Petr Harmanec <hec@sunstel.asu.cas.cz> J_A+A_312_879.xml