Based On Domestic And Foreign Telescopes And Survey Data, The Physical Parameters And Related Properties Of The Binary Star Were Studied

According to the existing research analysis for the late type eclipsing binary.And the late type eclipsing binary at the end of the main sequence stage.In this stage,the late type eclipsing binary features has attracted the attention of the researchers.Including the binary star's orbital period(generally less than a day)and its complete cycle is easy to be observed.And the frequent phenomenon of magnetic activity etc.Therefore,this article is mainly to research the late type eclipsing binary.By using the minor-caliber ground telescopes and the sky survey data.The research results are as follows:V441 Lac is a short-period eclipsing binary of 0.3089 days.Agerer et al.had surveyed it just using the light of the white in 2001.In order to study more imformation about V441 Lac like the related properties of physical parameters.We used the Chinese academy of sciences xinglong base 85 cm optical telescope to observe the W Uma type eclipsing binary V441 Lac for multi-band at the first time in 2013.We obtained the complete light curves of BVRI four bands.We also calculated three new minima time and updated its orbital period was 0.30891501 days at the same time.Our result also agreed the period showed an increasing trend and the increase rate is 75.67(0.35)10 d/ year-(10)?.Using the program of Wilson & Devinney we solved out its orbital parameters(mass ratio,orbital inclination,temperature,surface potential,etc.)for the first time.We also did another W Uma type eclipsing binary GR Boo.Therefore,Zhang et al.had surveyed GR Boo in VRI three filters.But they did not find the phenomenon that there were a change at two Max.on the light curves.Based on our observation of four bands and the careful comparison,we found that the O 'Connell effect(the value of two Max.are different).By adding a star spots in the primary star,we obtained a more accurate fitting of light curve.We also solved out the physical parameters of the spots.There were six new minimu been added in the relationship of O – C.they were more certification that orbital period of GR Boo shows a decreasing trend with a rate of72.36 10 d/ year--?.Through the two late type eclipsing binary's analysis,we can think that there is a huge number of eclipsing binaryies in the universe are waiting us to discover and research.In order to find more activity eclipsing binaries,we decided to use a large sample sky survey data.Like the LAMOST telescope(Guo Shoujin Telescope)spectral instruments.As we know it had observed a lot of target star's spectrum type.But much spectrum have a big deviation.In this article,we will correct the type spectrum of 870 LAMOST targets.And then NASA's search for extrasolar planets Kepler space telescope also observaed the same target stars.Combining the spectrum and the flux curves,we discovered 16 active stars in the LAMOST 870 eclipsing binary.