V1898 CYGNI: AN INTERACTING ECLIPSING BINARY IN THE VICINITY OF NORTH AMERICA NEBULA

WOS: 000295663700009We present spectroscopic observations of the double-lined Algol type eclipsing binary V1898 Cyg. Analyses of the BV light curves and RVs led to determination of the fundamental stellar parameters of the V1898 Cyg's components. The absolute parameters for the stars are derived as: M-1 = 6.054 +/- 0.037 M-circle dot, M-2 = 1.162 +/- 0.011 M-circle dot, R-1 = 3.526 +/- 0.009 R-circle dot, R-2 = 2.640 +/- 0.010 R-circle dot, T-eff1 = 18000 +/- 600 K, and T-eff2 = 6200 +/- 200 K. The residuals between the observed and computed times of mid-eclipses were analysed and a rate of the period change (P) over dot/P = 6.68 x 10(-7) yr(-1) was obtained; a mass transfer rate of 1.88 x 10(-7) Me in a year is estimated. We have calculated the distance to the system V1898 Cyg as 501 +/- 5 pc using the infrared JHK magnitudes and bolometric corrections for the primary star. The components of the system's proper motions present some indications about membership to the North America nebula.TUBITAK National Observatory (TUG)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [RTT150, 10ARTT150-483-0, 09BRTT150-468-0, 109T708]; INAFIstituto Nazionale Astrofisica; Italian MIURMinistero dell' Istruzione, dell' Universita e della Ricerca (MIUR)We thank Prof. G. Strazzulla, director of the Catania Astrophysical Observatory, and Dr. G. Leto, responsible for the M. G. Fracastoro observing station, for their warm hospitality and for allocating telescope time for the observations. We also thank TUBITAK National Observatory (TUG) for partial support in using RTT150 with project numbers 10ARTT150-483-0 and 09BRTT150-468-0. This research has been also supported by TUBITAK under project number 109T708 and INAF and Italian MIUR. This research has made use of the ADS and CDS databases, operated at the CDS, Strasbourg, France and ULAKBIM Sureli Yayinlar Katalogu. The authors thank the anonymous referee for his/her valuable comments