Can I read Asiago eclipsing binaries program. I. V432 Aur on EtoBox?

Asiago eclipsing binaries program. I. V432 Aur by Siviero, A.; Munari, U.; Sordo, R.; Dallaporta, S.; Marrese, P. M.; Zwitter, T.; Milone, E. F. is a scholarly article available to read on EtoBox.

What is Asiago eclipsing binaries program. I. V432 Aur about?

The orbit and physical parameters of the previously unsolved eclipsing binary V432 Aur, discovered by Hipparcos, have been derived with errors better than 1% from extensive Echelle spectroscopy and B, V photometry. Synthetic spectral analysis of both components has been performed, yielding T_eff and log g in close agreement with the orbital solution, a metallicity [Z/Z_sun]=-0.60 and rotational synchronization for both components. Direct comparison on the theoretical L, T_eff plane with the Padova evolutionary tracks and isochrones for the masses of the two components (1.22 and 1.08 M_sun) provides a perfect match and a 3.75 Gyr age. The more massive and cooler component is approaching the base of the giant branch and displays a probable pulsation activity with an amplitude of Delta V = 0.075 mag and Delta rad.vel. = 1.5 km/sec. With a T_eff = 6080 K it falls to the red of the nearby instability strip populated by delta Sct and gamma Dor types of pulsating variables. Orbital modeling reveals a large and bright surface spot on it. The pulsations activity and the large spot(s) suggest the presence of macro-turbulent motions in its atmosphere. They reflect in a line broadening that at

Author

Siviero, A.; Munari, U.; Sordo, R.; Dallaporta, S.; Marrese, P. M.; Zwitter, T.; Milone, E. F.

Published

2003

Language

EN