Photometric study of the late-type contact binary YY Eridani

Abstract

Abstract. Complete light curves in B and V bands for YY Eridani are presented in this paper. The light curves appear to have a marked asymmetry with Max. I brighter than Max. II. Using the latest version of the WilsonDevinney light curve synthesis program, we have computed photometric solutions from the new light curves of YY Eri. The present solutions reveal that YY Eri is a W subtype contact binary. The asymmetries of the light curves are explained by the presence of dark spot on the primary or secondary component.

Observational Results with the 1 Meter Telescope at Yunnan Observatory During 1990-2000

“…(e.g. Yang et al 1999;Liu, Q. et al 1993Liu, Q. et al ,1996Gu 1999). b) Photometric monitoring of AU Ser has shown variation not only in the light curve but also in the color curve and found possible short period oscillations (Li et al 1998).…”

BN nanosheet: An efficient carriers transfer promoter and stabilizer to enhance the photocatalytic performance of Ag2CO3

“…Over the past years, semiconductor photocatalysis has drawn increasing interest as a promising technique for solving the growing energy and environmental pollution by abundant solar light [1][2].…”

“…However, for the large band gap, these photocatalysts can only be actived under UV-light irradiation, which only has ca. 4.5% of solar light 2 and seriously restricts the application of photocatalysis technology. Therefore, development of efficient photacatalysts that can be actived under visible light irradiation is the social requirement.…”