The RV Cass spectrograph at ESO has been used to observe the W UMa star YY Eri, in order to obtain the spectroscopic mass ratio of its components. A new technique has been successfully applied for the measure of radial velocities from intermediate dispersion spectra. The fit of the radial velocities has been done using a Roche lobe model of stellar surfaces which takes into account the distortion of the radial velocity curves due to tidal effects. As a by-product of the procedure a new photometric solution of YY Eri has been obtained through a simultaneous treatment of B and V bands data.
YY ERI revisited / Nesci, R.; Maceroni, C.; Milano, L.; Russo, G.. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 159:(1986), pp. 142-146.
YY ERI revisited
Milano, L.;Russo, G.
Membro del Collaboration Group
1986
Abstract
The RV Cass spectrograph at ESO has been used to observe the W UMa star YY Eri, in order to obtain the spectroscopic mass ratio of its components. A new technique has been successfully applied for the measure of radial velocities from intermediate dispersion spectra. The fit of the radial velocities has been done using a Roche lobe model of stellar surfaces which takes into account the distortion of the radial velocity curves due to tidal effects. As a by-product of the procedure a new photometric solution of YY Eri has been obtained through a simultaneous treatment of B and V bands data.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
