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Journals / Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi / 2026 / Cilt: 22 Sayı: 64

Orbital Period Changes of Contact Binaries: HT Vir and V1073 Cyg

Değen Çiftlerin Yörünge Dönem Değişimleri: HT Vir ve V1073 Cyg

Muhammed Faruk Yıldırım0000-0003-3898-7341
Faruk Soydugan(ÇANAKKALE ONSEKİZ MART ÜNİVERSİTESİ, FEN VE EDEBİYAT FAKÜLTESİ, FİZİK BÖLÜMÜ)0000-0002-5141-7645
Pages
277–285
Publication Date
2020-01-24
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

From the analysis of O-C residuals, it was found that HT Vir indicates orbital period increase, whereas the period of V1073 Cyg is decreasing.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, we investigated changes in the orbital period of two eclipsing contact binaries HT Vir and V1073 Cyg using all published times of minima.
📊
Key Findings & Data:From the analysis of O-C residuals, it was found that HT Vir indicates orbital period increase, whereas the period of V1073 Cyg is decreasing.
💡
Conclusion & Impact:Periodic changes were explained as being the result of a hypothetical third companion around the eclipsing pair.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Yıldızlar · Örten Çift Yıldızlar · Yakın Çift Yıldızlar

Abstract

In this study, we investigated changes in the orbital period of two eclipsing contact binaries HT Vir and V1073 Cyg using all published times of minima. From the analysis of O-C residuals, it was found that HT Vir indicates orbital period increase, whereas the period of V1073 Cyg is decreasing. The changing rates of their periods have been determined to be 1.33 and -0.43 s/century for HT Vir and V1073 Cyg, respectively. In the distribution of O-C graph for HT Vir and V1073 Cyg, periodic variations also exist. Periodic changes were explained as being the result of a hypothetical third companion around the eclipsing pair.

Özet

Bu çalışmada, iki örten değen çift yıldız HT Vir ve V1073 Cyg sistemlerinin yayınlanmış minimum zamanları kullanarak yörünge dönem değişimlerini inceledik. Sistemlerin O-C analizleri sonucunda, HT Vir sisteminin döneminin arttığı, buna karşın V1073 Cyg sisteminin döneminin azaldığı bulundu. Dönem değişim oranları HT Vir ve V1073 Cyg için sırasıyla 1.33 s/yüzyıl ve -0.43 s/yüzyıl olarak belirlenmiştir. Aynı zamanda her iki sistem için elde edilen O-C grafiklerinde periyodik değişim de görülmektedir. Periyodik değişim, çiftin etrafında olası görülmeyen üçüncü bir bileşenin ile açıklanmıştır.

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Cite This Article

Yıldırım, M. F., Soydugan, F. (2020). Orbital Period Changes of Contact Binaries: HT Vir and V1073 Cyg. Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi, Cilt: 22 Sayı: 64, 277–285. https://doi.org/10.21205/deufmd.2020226429

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References (34)

  1. Aitken, R.G., 1932, New General Catalogue of Double Stars within 120 degrees of the North Pole, Science, Vol: 76, pp: 103-104. DOI: 10.1126/science.76.1961.103 (Washington: Carnegie Institution of Washington).
  2. Aslan, Z., Herczeg, T.J., 1984, On the Periods of RZ Comae and V1073 Cygn, Information Bulletin on Variable Stars, No. 2478. BC: 1984IBVS.2478.1A
  3. Ekmekçi, F. et al., 2012, Physical parameters of some close binaries: ET Boo, V1123 Tau, V1191 Cyg, V1073 Cyg and V357 Peg, New Astronomy, Vol: 17, No: 7, p: 603-609. DOI: 10.1016/j.newast.2012.03.001
  4. Irwin, J.B., 1959, Standard light-time curves, Astronomical Journal, Vol: 64, pp: 149. DOI: 10.1086/107913
  5. Katarzyna, B. et al., 2014, New spectroscopy of multiple stars RR Lyncis and HT Virginis, Information Bulletin on Variable Stars, No. 6121. BC: 2014IBVS.6121.1B.
  6. Kreiner, J.M., Kim, C-H., Nha, II-Seong, 2001, An atlas of O-C Diagrams of Eclipsing Binary Stars, Cracow, Poland.
  7. Liao, W.P. Qian, S.B., 2010, Detection of a Cyclic Period Change in the W UMa-Type System HT Virginis, Publications of the Astronomical Society of Japan, Vol: 62, No: 3, pp:521—524. DOI: 10.1093/pasj/62.3.521.
  8. Lu, W. et al. 2001, Radial Velocity Studies of Close Binary Stars IV, The Astronomical Journal, Vol: 122, No: 1, pp: 402-412. DOI: 10.1086/321131.
  9. Morris, S.L., Naftilan, S.A., 2000, V1073 Cygni: A New Light Curve and Analysis, The Publications of the Astronomical Society of the Pacific, Vol: 112, No: 772, pp: 852-860. DOI: 10.1086/316580.
  10. Paschke, A. and Brat, L., 2006, O-C Gateway a Collection of Minima Timings, Open European Journal on Variable Stars, Vol: 23, pp: 13-15. BC: 2006OEJV.23.13P.
  11. Pribulla,T. et al., 2006, Radial Velocity Studies of Close Binary Stars XI, The Astronomical Journal, Vol: 132, No: 2, pp: 769-780. DOI: 10.1086/505536.
  12. Qian, S., 2001a, A possible relation between the period change and the mass ratio for W-type contact binaries, Monthly Notices of the Royal Astronomical Society, Vol: 328, No: 2, pp: 635-644. DOI: 10.1046/j.1365-8711.2001.04931.x.
  13. Qian, S., 2001b, Orbital period changes of contact binary systems: direct evidence for thermal relaxation oscillation theory, Monthly Notices of the Royal Astronomical Society, Vol: 328, No: 3, pp: 914-924. DOI: 10.1046/j.1365-8711.2001.04921.x.
  14. Sezer, C., 1994, Erratum - a Photometric Study of the Eclipsing Binary V1073-CYGNI, Astrophysics and Space Science, Vol: 215, No: 1, pp:153. BC: 1994Ap&SS.215.153S.
  15. Siwak, M., Zola, S., Kozeil-Wierzbowska, D., 2010, A Study of Contact Binaries with Large Temperature Differences between Components, Acta Astronomica, Vol: 60, No: 4, pp: 305-336. BC: 2010AcA.60.305S
  16. Strohmeier, W., 1960, Veroeffentlichungen der Remeis-Sternwarte zu Bamberg, Nr. 27. Veranderlichen-Colloquium Bamberg 1959. Bamberg, pp:1. BC: 1960VeBam.27.1S.
  17. Strohmeier, W., 1962, New Bright Eclipsing Variable Stars, Information Bulletin on Variable Stars, No. 9. BC: 1962IBVS.9.1S
  18. Tarıver, M., Özeren, F.F., 2016, The Sun Like Star: HT Vir, The 19th Cambridge Workshop on Cool, Stellar Systems, and the Sun(CS19), Uppsala, Sweden, Edited by G.A. Feiden.
  19. Wolf, M, Diethelm, R., 1992, Period changes of early-type eclipsing binaries, Acta Astronomica, Vol: 42, No: 4, pp:363-370. BC: 1992AcA.42.363W.
  20. Xiao-man, T., et al. 2018, Multi-color light curves and orbital period research of eclipsing binary V1073 Cyg, Research in Astronomy and Astrophysics, Vol: 18, No: 2. DOI: 10.1088/1674-4527/18/2/20
  21. Yang, Y., Liu, Q., 2000, Unstable Behavior of the W UMa-Type Contact Binary V1073 Cygni, Astrophysics and Space Science, Vol: 274, No: 4, p: 799-807. BC: 2000Ap&SS.274.799Y
  22. Yildirim, M.F., Aliçavuş, F., Soydugan F., 2019, CN Andromedae: a shallow contact binary with a possible tertiary component, Research in Astronomy and Astrophysics, Nol: 19, No: 1. DOI: 10.1088/1674-4527/19/1/10.
  23. Zola, S. et al., 2005, Physical Parameters of Components in Close Binary Systems V, Acta Astronomica, Vol: No: 55, pp:389-405. BC: 2005AcA.55.389Z.
  24. Aslan, Z., Herczeg, T.J., 1984, On the Periods of RZ Comae and V1073 Cygn, Information Bulletin on Variable Stars, No. 2478. BC: 1984IBVS.2478.1A
  25. Katarzyna, B. et al., 2014, New spectroscopy of multiple stars RR Lyncis and HT Virginis, Information Bulletin on Variable Stars, No. 6121. BC: 2014IBVS.6121.1B.
  26. Morris, S.L., Naftilan, S.A., 2000, V1073 Cygni: A New Light Curve and Analysis, The Publications of the Astronomical Society of the Pacific, Vol: 112, No: 772, pp: 852-860. DOI: 10.1086/316580.
  27. Paschke, A. and Brat, L., 2006, O-C Gateway a Collection of Minima Timings, Open European Journal on Variable Stars, Vol: 23, pp: 13-15. BC: 2006OEJV.23.13P.
  28. Sezer, C., 1994, Erratum - a Photometric Study of the Eclipsing Binary V1073-CYGNI, Astrophysics and Space Science, Vol: 215, No: 1, pp:153. BC: 1994Ap&SS.215.153S.
  29. Siwak, M., Zola, S., Kozeil-Wierzbowska, D., 2010, A Study of Contact Binaries with Large Temperature Differences between Components, Acta Astronomica, Vol: 60, No: 4, pp: 305-336. BC: 2010AcA.60.305S
  30. Strohmeier, W., 1960, Veroeffentlichungen der Remeis-Sternwarte zu Bamberg, Nr. 27. Veranderlichen-Colloquium Bamberg 1959. Bamberg, pp:1. BC: 1960VeBam.27.1S.
  31. Strohmeier, W., 1962, New Bright Eclipsing Variable Stars, Information Bulletin on Variable Stars, No. 9. BC: 1962IBVS.9.1S
  32. Wolf, M, Diethelm, R., 1992, Period changes of early-type eclipsing binaries, Acta Astronomica, Vol: 42, No: 4, pp:363-370. BC: 1992AcA.42.363W.
  33. Yang, Y., Liu, Q., 2000, Unstable Behavior of the W UMa-Type Contact Binary V1073 Cygni, Astrophysics and Space Science, Vol: 274, No: 4, p: 799-807. BC: 2000Ap&SS.274.799Y
  34. Zola, S. et al., 2005, Physical Parameters of Components in Close Binary Systems V, Acta Astronomica, Vol: No: 55, pp:389-405. BC: 2005AcA.55.389Z.