Analysis of Minimum Light Times and Orbital Period Variations of the Eclipsing Binary System PV Comae Berenices
Article Sidebar
Main Article Content
Abstract
Eclipsing binary systems are crucial for studying stellar structure and evolution. This research aims to investigate the orbital period changes of the eclipsing binary system PV Comae Berenices through observations in the visual wavelength band (551 nm) at Thai National Observatory on April 15-16, 2022. The study found that the times of minimum light were 2459685.272 and 2459686.166, respectively. When analyzing these data together with historical data from 2002 to 2020, a new linear ephemeris equation was calculated. The O–C diagram analysis revealed a clear downward parabolic pattern, indicating a continuous decrease in the orbital period with a period change rate of –4.55 × 10–2 seconds per year. This decrease caused by mass transfer between the two stars or angular momentum loss through the magnetic braking mechanism. The findings from this study will enhance our understanding of the evolution of PV Comae Berenices binary systems.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
References
Alton, K. (2020). PV Comae Berenices (VSX entry). AAVSO International Variable Star Index. https://www.aavso.org/vsx/index.php?view=detail.top&oid=95127
Alton, K.B., & Stępień, K. (2021). Roche modeling and evolutionary history of six low mass contact binary systems. Acta Astronomica, 71(2), 123-161. https://doi.org/10.32023/0001-5237/71.2.4
Czech Astronomical Society. (2002). PV Com - Eclipsing binary. Variable Star and Exoplanet Section of the Czech Astronomical Society. https://var.astro.cz/en/Stars/12558
Darwish, M.S., Abdelkawy, A.G., & Hamed, G.M. (2024). Light curve analysis and evolutionary status of four newly identified short-period eclipsing binaries. Scientific Reports, 14(1), 3998. https://doi.org/10.1038/s41598-024-54289-1
Diethelm, R. (2009). Timings of minima of eclipsing binaries. Information Bulletin on Variable Stars. 5894(1), 1-10. https://ibvs.konkoly.hu/pub/ibvs/5801/5894.pdf
Diethelm, R. (2010). Timings of minima of eclipsing binaries. Information Bulletin on Variable Stars, 5945(1), 1-9. https://ibvs.konkoly.hu/pub/ibvs/5901/5945.pdf
Diethelm, R. (2011). Timings of minima of eclipsing binaries. Information Bulletin on Variable Stars, 5992(1), 1-22. https://ibvs.konkoly.hu/pub/ibvs/5901/5992.pdf
Diethelm, R. (2012). Timings of minima of eclipsing binaries. Information Bulletin on Variable Stars, 6029(1), 1-22. https://ibvs.konkoly.hu/pub/ibvs/6001/6029.pdf
Diffraction Limited. (2013). MaxIm DL Pro (Version 5.24) [Computer software]. Diffraction Limited. https://diffractionlimited.com
Fang, X., Wang, Q., & Qian, S. (2024). Orbital period change of SW Sex star TT Tri. Monthly Notices of the Royal Astronomical Society, 531(1), 213-218. https://doi.org/10.1093/mnras/stae1184
Qian, S.B., Dai, Z.B., He, J.J., Yuan, J.Z., Xiang, F.Y., & Zejda, M. (2007). Orbital period changes of the nova-like cataclysmic variable AC Cancri: evidence of magnetic braking and an unseen companion. Astronomy & Astrophysics, 466(2), 589-594. https://doi.org/10.1051/0004-6361:20065970
Hahs, G., Ortmann, C., & Gokhale, V. (2020). Light curve asymmetries in three short period eclipsing binary stars. Journal of the American Association of Variable Star Observers (JAAVSO), 48(1), 57. https://apps.aavso.org/jaavso/article/3580/
Hu, K., Meng, Z.B., Wang, H.W., Yu, Y.X., & Xiang, F.Y. (2022). First photometric and orbital period investigations of four W UMa-type eclipse binaries. Publications of the Astronomical Society of Australia, 39, e057. https://doi.org/10.1017/pasa.2022.53
Jayasinghe, T., Stanek, K.Z., Kochanek, C.S., Shappee, B.J., Holoien, T.W.S., Thompson, T.A., Prieto, J.L., Dong, S., Pawlak, M., Pejcha, O., Shields, J.V., Pojmanski, G., Otero, S., Britt, C., A., & Will, D. (2018). The ASAS-SN catalog of variable stars II: Uniform classification of 412,000 known variables. Monthly Notices of the Royal Astronomical Society, 489(2), 1907–1943. https://doi.org/10.1093/mnras/stz844
Jones, D., Conroy, K. E., Horvat, M., Giammarco, J., Kochoska, A., Pablo, H., Brown, A.J., Sowicka, P. & Prša, A. (2020). Physics of Eclipsing Binaries. IV. The impact of interstellar extinction on the light curves of eclipsing binaries. The Astrophysical Journal Supplement Series, 247(2), 63. https://doi.org/10.3847/1538-4365/ab7927
Khaliullina, A.I. (2021). Variations in the orbital periods of eclipsing binaries RY Aqr, AK Vir, and AX Vul. Astronomy Reports, 65, 126-136. https://doi.org/10.1134/S1063772921020037
Koçak, D., Yakut, K., Southworth, J., Eggleton, P.P., İçli, T., Tout, C.A., & Bloemen, S. (2021). The nature of the eccentric double-lined eclipsing binary system KIC 2306740 with Kepler space photometry. The Astrophysical Journal, 910(2), 111. https://doi.org/10.3847/1538-4357/abe546
Lalounta, E., Christopoulou, P.E., Papageorgiou, A., Lopes, C.F., & Catelan, M. (2024). A study of nine extremely low mass ratio-contact binary systems. The Astronomical Journal, 168(2), 50. https://doi.org/10.3847/1538-3881/ad4882
Li, C.Y., Jiang, L.Q., Zheng, J., Liu, Y.M., Long, X.Y., Sun, M., Zhang H.L., & Tian, X.M. (2024). V0405 Dra: a new deep and low mass ratio contact binary with extremely fast decrease in the orbital period. Research in Astronomy and Astrophysics, 24(6), 065023. https://doi.org/10.1088/1674-4527/ad47dd
Li, L., Zhang, F., Han, Z., Jiang, D., & Jiang, T. (2008). The evolutionary status of W Ursae majoris-type systems. Monthly Notices of the Royal Astronomical Society, 387(1), 97-104. https://doi.org/10.1111/j.1365-2966.2008.12736.x
Lohr, M.E., Norton, A.J., Kolb, U.C., Maxted, P.F.L., Todd, I., & West, R.G. (2013). Period and period change measurements for 143 SuperWASP eclipsing binary candidates near the short-period limit and discovery of a doubly eclipsing quadruple system. Astronomy & Astrophysics, 549, A86. https://doi.org/10.1051/0004-6361/201220562
Lohr, M.E., Norton, A.J., Payne, S.G., West, R.G., & Wheatley, P.J. (2015). Orbital period changes and the higher-order multiplicity fraction amongst SuperWASP eclipsing binaries. Astronomy & Astrophysics, 578, A136. https://doi.org/10.1051/0004-6361/201525747
Meng, F., Zhu, L., Qian, S., Liu, N., Li, L., & Matekov, A. (2023). NY bootes: an active deep and low-mass-ratio contact binary with a cool companion in a hierarchical triple system. The Astrophysical Journal, 954(2), 111. https://doi.org/10.3847/1538-4357/ace8fe
Nelson, B. (2019). Software by Bob Nelson. https://www.variablestarssouth.org/resources/bob-nelsons-software-tools/software-by-bob-nelson
Papageorgiou, A., Christopoulou, P.E., Lalounta, E., Lopes, C.F., Catelan, M., Drake, A.J., Hantzios, P., & Alikakos, L. (2023). A unique low-mass-ratio contact eclipsing binary system under the period cutoff. The Astrophysical Journal, 952(2), 141. https://doi.org/10.3847/1538-4357/acdcf3
Pojmanski, G. (2002). The all sky automated survey. Variable Stars in the 0h - 6h Quarter of the Southern Hemisphere. Acta Astronomica. 52(1), 397-427. https://doi.org/10.48550/arXiv.astro-ph/0210283
Qian, S.B., He, J.J., Zhang, J., Zhu, L.Y., Shi, X.D., Zhao, E.G., & Zhou, X. (2017). Physical properties and catalog of EW-type eclipsing binaries observed by LAMOST. Research in Astronomy and Astrophysics, 17(8), 087. https://doi.org/10.1088/1674-4527/17/8/87
Qian, S.B., Yuan, J.Z., Xiang, F.Y., Soonthornthum, B., Zhu, L.Y., & He, J.J. (2007). Ternarity, activity, and evolutionary state of the W UMa-type binary UX eridani. The Astronomical Journal, 134(5), 1769. https://doi.org/10.1086/521927
SIMBAD Astronomical Database. (2020). BD+16 2387 and BD+16 2388. Centre de Données astronomiques de Strasbourg. https://simbad.cds.unistra.fr/simbad/
Smith, G.D., Gillen, E., Queloz, D., Hillenbrand, L.A., Acton, J.S., Alves, D.R., Anderson, D.R., Bayliss, D., Briegal, J.T., Burleigh, M.R., Casewell, S.L., Delrez, L., Dransfield, G., Ducrot, E., Gill, S., Gillon, M., Goad, M.R., Günther, M.N., Henderson, B.A., ..., Wheatley, P.J. (2021). NGTS clusters survey–III. A low-mass eclipsing binary in the Blanco 1 open cluster spanning the fully convective boundary. Monthly Notices of the Royal Astronomical Society, 507(4), 5991-6011. https://doi.org/10.1093/mnras/stab2374
Thiemann, H.B., Norton, A.J., Dickinson, H.J., McMaster, A., & Kolb, U.C. (2021). SuperWASP variable stars: classifying light curves using citizen science. Monthly Notices of the Royal Astronomical Society, 502(1), 1299-1311. https://doi.org/10.1093/mnras/stab140
Tian, X.M., Jiang, L.Q., Wang, Z.H., & Wang, J.J. (2025). The first photometric investigation of two short-period Algol-type eclipsing binaries: IW UMa and V367 Gem. Frontiers in Astronomy and Space Sciences, 11, 1497989. https://doi.org/10.3389/fspas.2024.1497989
Yang, Y., Yuan, H., Wang, S., & Dai, H. (2022). Magnetic activity on four short-period contact binaries: V0576 Peg, KW Psc, V0873 Per, and FY Boo. The Astronomical Journal, 163(6), 250. https://doi.org/10.3847/1538-3881/ac63c0
