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Your search keyword '"Xu, Zhi-Li"' showing total 10 results
Start Over Author "Xu, Zhi-Li" Publisher elsevier bv
10 results on '"Xu, Zhi-Li"'

1. KIC 4762887: A near-contact binary or an ellipsoidal variable star?

Author

Liang Liu and Xu-Zhi Li

Subjects
Physics, 010308 nuclear & particles physics, Binary number, Astronomy and Astrophysics, Contact binary, Astrophysics, Light curve, 01 natural sciences, Ellipsoid, symbols.namesake, Space and Planetary Science, Fourier analysis, 0103 physical sciences, symbols, Code (cryptography), Main effect, Variable star, 010303 astronomy & astrophysics, Instrumentation
Abstract

KIC 4762887 is a variable star with a very small amplitude discovered by K e p l e r and show the EW-type light curve. We analyzed the light curve of KIC 4762887 by using the 2015 version of the Wilson-Devinney code. The results indicated that it is not a contact binary, maybe not even an eclipsing binary. We also modelled the light curve by the Fourier analysis. The results indicated that the main effect in the light variations of KIC 4762887 is the ellipsoidal effect. Finally, we confirmed that KIC 4762887 is not an eclipsing binary, but rather an ellipsoidal variable star.

Published
2021
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2. Photometric study of five kepler contact binaries

Author

Liang Liu and Xu-Zhi Li

Subjects
Physics, 010308 nuclear & particles physics, Mode (statistics), Astronomy and Astrophysics, Astrophysics, Light curve, 01 natural sciences, Kepler, Space and Planetary Science, 0103 physical sciences, Scale variation, Code (cryptography), Time domain, Low Mass, 010303 astronomy & astrophysics, Instrumentation
Abstract

A lot of data in time domain were obtained by the Kepler mission, including many contact binaries. Long-term observation lets us obtain more information about the short time scale variation in their light curves or in their orbital periods. Unfortunately, the exposure time is too long (most of them are 30 minutes). Hence, many variations in light curves are smoothed. To avoid this problem, we analyzed some Kepler contact systems with both long-cadence mode and short-cadence mode data. Using the latest version of the Wilson-Devinney code, we obtained the physical parameters of a batch of contact binaries and find out four targets(KIC 5123176, KIC 5296877, KIC 8496820, KIC 9776718) have low mass ratios (q

Published
2020
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