| Résumé | We present a spectrum and a photometric analysis of the newly discovered, high-amplitude, solartype, eclipsing binary HO Piscium. A spectroscopic identification, a period study, q-search, and a simultaneous UBVR cI c light-curve solution are presented. The spectra and our photometric solution indicate that HO Psc is a W-typeWUMa shallow-contact (fill-out ~8%) binary system. The primary component has a G6V spectral type with an apparently precontact spectral type of M2V for the secondary component. The small fill-out indicates that the system has not yet achieved thermal contact and thus has recently come into physical contact. This may mean that this solar-type binary system has not attained its ~0:4 mass ratio via a long period of magnetic braking, as would normally be assumed. |
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