Spanish astronomer Salvador Barkin managed to find a new double star system in the constellation of the Dragon. This is an EW-type double star. Eclipse binary EW stars are W type variables of the Big Dipper, whose periodicity lasts less than a day. They usually consist of two ellipsoidal dwarfs of spectral types F, G and K. They are in contact with each other and are endowed with a common convective shell located between the inner and outer critical surface of the Roche cavity.
The VSX catalog contains more than 40,000 EW, but scientists are interested in finding new ones, since the origin and evolution of such objects are still completely misunderstood. For example, it is unclear exactly how their binary forms are formed. Some believe that third bodies play an important role, imparting angular momentum from a central double element through a previously dynamic interaction and subsequent evolution.
A phase graph presented with data from the ASAS-SN database for the period P = 0.428988 days and the HJD epoch 2457994.2756
To search, Barkin chose a region with a length of 200 angular seconds around a particular star TYC 3905-2030-1 in the territory of the Dragon. The star found was designated UCAC4 716-059522. Its period reaches 0.43 days, and the amplitude is 0.34. The light curve and characteristics indicated that we are facing a new EW-type object.
