T. Iijima   H. Naito   S. Narusawa   
Astronomy & Astrophysics 622 A45-A45 2019年1月 [査読有り]
Context. CH Cyg is one of the most studied symbiotic stars. Its properties, however, are still not well known. Two main periods, about 15 years and 750 days, are known in the photometric and spectroscopic variations, and two models are proposed fo...