机译:On the binarity of the classical Cepheid X Sagittarii from interferometric observations (Research Note)
INAF - Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monteporzio Catone (RM), Italy;
Università degli Studi di Roma "Tor Vergata", via della Ricerca Scientifica 1, 00133 Rome, Italy;
stars; variables; Cepheids - binaries; close - techniques; interferometric - instrumentation; interferometers - infrared: stars;