SIMBAD references

Light curves of the semi-detached eclipsing binary system TZ Eridani in the Geneva 7-colour photometric system were analysed using the Wilson-Devinney programme. The physical and orbital parameters have been determined through a self-consistent simultaneous solution of the seven light curves and of the radial velocity curves of both components. The following absolute elements of the components are, for the primary (mass gainer), M₁=1.97±0.06M_☉, R₁=1.69±0.03R_☉, M_bol1=2.36±0.09, T_eff1=7770±100K, and for the secondary (mass loser), M₂=0.37±0.01M_☉, R₂=2.60±0.04R_☉, M_bol2=3.74±0.13, T_eff2=4570±100K. The semi-major axis A of the relative orbit is 10.57±0.16R_☉. The regular increase of the period is described. The spectral type of the components are A5/6 V (primary) and K0/1 III. The secondary has exhibited a long-term luminosity increase of about 0.06 in V between Dec. 1983 and Dec. 1996. The distance to TZ Eri is evaluated to 270±12pc.