【摘 要】
：
The first photometric analysis of V811 Cep was carried out.The first complete light curves of V,R and I bands are given.The analysis was carried out by the Wilson-Devinney (W-D) program,and the results show that V811 Cep is a median-contact binary (f =33.
【机 构】
：
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment,Institute
论文部分内容阅读
The first photometric analysis of V811 Cep was carried out.The first complete light curves of V,R and I bands are given.The analysis was carried out by the Wilson-Devinney (W-D) program,and the results show that V811 Cep is a median-contact binary (f =33.9 (±4.9)％) with a mass ratio of 0.285.It is a W-subtype contact binary,that is,the component with less mass is hotter than the component with more mass,and the light curves are asymmetric (O\'Connell effect),which can be explained by the existence of a hot spot on the component with less mass.The orbital inclination is i =88.3°,indicating that it is a totally eclipsing binary,so the parameters obtained are reliable.Through the O-C analyzing,it is found that the orbital period decreases at the rate of P =-3.90(±0.06) × 10-7d yr-1,which indicates that the mass transfer occurs from the more massive component to the less massive one.
其他文献
In deep space exploration,many engineering and scientific requirements require the accuracy of the measured Doppler frequency to be as high as possible.In our paper,we analyze the possible frequency measurement points of the third-order phase-locked loop
In deep space exploration,it is necessary to improve the accuracy of frequency measurement to meet the requirements of precise orbit determination and various scientific studies.A phase detector is one of the key modules that restricts the tracking perfor
The eclipsing binary 2MASS J04100497+2931023 (J04100497+2931023) is classified its spectral type of M0±2V on basis of a low-resolution spectral survey by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST).The low-resolution spectra exh
Prominence plumes are evacuated upflows that emerge from bubbles below prominences,whose formation mechanism is still unclear.Here we present a detailed study of plumes in a quiescent prominence using the high-resolution Hα filtergrams at the line center
The red giant branch (RGB) of globular clusters (GCs) is home to some exotic stars,which may provide clues on the formation of multiple stellar populations in GCs.It is well known that binary interactions are responsible for many exotic stars.Thus,it is i
This paper reports analysis of an eclipsing binary system KIC5197256 with a δ Sct variable component.Utilizing light-curve modeling,several stellar parameters are derived,e.g.,temperature,mass,and mass ratio.The O-C diagram is a straight line with a negat
Lucky imaging is a high-resolution astronomical image recovery technique with two classic implementation algorithms,i.e.image selecting,shifting and adding in image space,and data selecting and image synthesizing in Fourier space.This paper proposes a nov
Results from optical CCD photometric observations of 13 pre-main-sequence stars collected during the period from February 2007 to November 2020 are presented.These stars are located in the association Cepheus OB3,in the field of the young star V733 Cephei
Two-way Doppler measurement is a typical Earth-based radiometric technique for interplanetary spacecraft navigation and gravity science investigation.The most widely used model for the computation of two-way Doppler observables is Moyer\'s differenced-r
Asteroseismic observations are crucial to constrain stellar models with precision.Bayesian Estimation of STellar Parameters (BESTP) is a tool that utilizes Bayesian statistics and nested sampling Monte Carlo algorithm to search for the stellar models that