The first photometric analysis study of the GW Psc binary system

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Tanrıver M., Bulut A.

NEW ASTRONOMY, vol.96, no.101848, pp.1-9, 2022 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 96 Issue: 101848
  • Publication Date: 2022
  • Doi Number: 10.1016/j.newast.2022.101848
  • Journal Name: NEW ASTRONOMY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.1-9
  • Erciyes University Affiliated: Yes


The first photometric solution in the 𝐵, 𝑉 , 𝑅𝑐 and 𝐼𝑐 filters of the short period GW Psc eclipsing binary is

presented based on new ground-based CCD photometric observations. We analysed the BVRI photometric

light curves of the system, using Phoebe0.31a, a binary star modelling program, with the Wilson and Devinney

(Wilson and Devinney (1971); Wilson (1979) method based on Roche geometry to achieve the best accordance

to the photometric observations to estimate their absolute parameters from the light curves. We updated the

ephemeris of GW Psc using two new light curve minima derived by our new observational data from those

collected in the literature and analysed the change of the system’s orbital period. The O–C plot suggests the

presence of a companion. The distance of GW Psc are 318.4 ± 19.4 𝑝𝑐. From the solutions, we find that GW

Psc is A–subtype W UMa over-contact binaries with 𝑞 = 0.399 mass ratios and 𝑓 = 0.21 fill–out factor. The

likely HR diagram positions of the eclipsing binary system’s components are discussed. The system’s estimated

absolute dimensions were compared to those of similar binaries in the 𝑙𝑜𝑔𝑇𝑒𝑓 𝑓 −𝑙𝑜𝑔𝐿, 𝑙𝑜𝑔𝑀 −𝑙𝑜𝑔𝐿, 𝑙𝑜𝑔𝑀 −𝑙𝑜𝑔𝑅

and 𝑙𝑜𝑔𝑀 − 𝑙𝑜𝑔𝐽0 diagrams