Other
Scientific paper
Aug 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002kfnt...18..291z&link_type=abstract
Kinematika i Fizika Nebesnykh Tel, v. 18, no. 4, p. 291-305
Other
Scientific paper
UBVR photoelectric observations of the eclipsing variable stars IQ Cas and CS Per were carried out for the first time at the Maidanak Observatory in 1988-1999. We improved the ephemerides of the binaries: Min I = JDH 2451113.535(21) + 3.5417102(97) × E for IQ Cas and Min I = JDH 2449417.549(64) + 23.25765(16) × E for CS Per. All light curves of the binaries were solved by Lavrov's direct method, and the elements of the photometric orbit were obtained. The expected absolute basic parameters for the components were estimated: Mh = 6.3Msun, Mc = 2.0Msun, Rh = 5.4 Rsun, Rc = 3.2Rsun, Mh, bol = -3.7m, Mc, bol = 1.4m for IQ Cas and Mh = 4.0Msun, Mc = 3.1Msun, Rh = 4.3Rsun, Rc = 11.87Rsun, Mh, bol = -1.9m, Mc, bol = -0.7m for CS Per. The ages of the IQ Cas components differ from each other - 3× (107) (hot) and 2×(106) (cool) yrs. The primary is evolving off from the ZAMS while the secondary has not reached it yet. Both components of CS Per have already left the MS, and their age is (1-3)×108 yrs. The nature of CS Per isn't obvious. The distance moduli of the binaries and the double cluster h and χ Per are nearly the same. The binaries are probable members of the Perseus arm.
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