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Öğe Detection of oscillation-like patterns in eclipsing binary light curves using neural network-based object detection algorithms(Edp Sciences S A, 2025) Ulaş, Burak; Szklenar, T.; Szabo, R.Aims. The primary aim of this research is to evaluate several convolutional neural network-based object detection algorithms for identifying oscillation-like patterns in light curves of eclipsing binaries. This involved creating a robust detection framework that can effectively process both synthetic light curves and real observational data. Methods. The study employs several state-of-the-art object detection algorithms, including Single Shot MultiBox Detector, Faster Region-based Convolutional Neural Network, You Only Look Once, and EfficientDet, as well as a custom non-pretrained model implemented from scratch. Synthetic light curve images and images derived from observational TESS light curves of known eclipsing binaries with a pulsating component were constructed with corresponding annotation files using custom scripts. The models were trained and validated on established datasets, which was followed by testing on unseen Kepler data to assess their generalisation performance. The statistical metrics were also calculated to review the quality of each model. Results. The results indicate that the pre-trained models exhibit high accuracy and reliability in detecting the targeted patterns. The Faster Region-based Convolutional Neural Network and You Only Look Once in particular showed superior performance in terms of object detection evaluation metrics on the validation dataset, including a mean average precision value exceeding 99%. The Single Shot MultiBox Detector, on the other hand, is the fastest, although it shows a slightly lower performance, with a mean average precision of 97%. These findings highlight the potential of these models to significantly contribute to the automated determination of pulsating components in eclipsing binary systems and thus facilitate more efficient and comprehensive astrophysical investigations.Öğe Discovery of ? Sct components in eclipsing binary systems IQ CMa, AW men and W Vol(Oxford University Press, 2023) Ulaş, Burak; Ulusoy, CerenWe present the first evidence on the δ Sct type pulsations of the primary components of three eclipsing binaries IQ CMa, AW Men, and W Vol in the Transiting Exoplanet Survey Satellite (TESS) field. A comprehensive investigation of the binary properties is conducted. The light curves of the systems are analysed and the frequency analyses are performed to residual data. The systems are compared to the binaries of the same morphological types, and the primaries are examined in contrast to the δ Sct type pulsators. The results show that the systems are oscillating eclipsing Algol-type systems.Öğe Düşük Kütle Oranlı Değen Çift Yıldız Dizgesi V728 Herculis(Türk Astronomi Derneği, 2020) Ulaş, Burak; Erkan, NaciBu çalışmada V728 değen çift yıldız dizgesinin yeni gözlemleri, dönem çözümlemesi, ışık ve dikine hız eğrisi çözümü sunulmuştur. Yörünge dönemi çalışması düşük kütleli yıldızın daha büyük kütleliye madde aktardığını ve ek bir mekanizmanın da yörüngede sinüs benzeri değişime neden olduğunu göstermiştir. Dizgenin fiziksel özellikleri elde edilmiş ve yüksek değme derecesine sahip, düşük kütle oranlı bir dizge olduğu sonucuna varılmıştır.Öğe Four New Eclipsing Binary Systems in the TESS field: CD-34 13220, HD 295082, TYC 6484-426-1 and TYC 6527-2310-1(IOP Publishing, 2021) Ulaş, BurakWe present the first evidence for the binarity of four targets in the TESS field. The temperatures are estimated by SED analysis and the orbital periods are determined. The TESS light curves of the systems are analyzed and the orbital and the absolute parameters are derived. The targets are also compared to wellstudied binary systems with the same morphological type and their evolutionary states are discussed. Our results indicate that the stars belong to the class of eclipsing detached binary systems.Öğe Six Newly Discovered Eclipsing Binary Systems in the TESS field(Institute of Physics, 2023) Ulaş, Burak; Ayan, VildanWe present the first detailed investigation of six eclipsing binary systems in the TESS field. The TESS light curves of the targets are analyzed by determining the initial effective temperatures via SED fits. The absolute parameters are derived and the systems are compared to well-known binaries of the same type. Results show that CD-58791, CD-621257 and TYC 9356-355-1 are detached binary systems. CD-54942 and UCAC4 136-007295 are contact binaries while TYC 8508-1413-1 is a semidetached system.Öğe Zonklayan bileşenli algollerde bozulmanın zonklama dönemine etkisi(Çanakkale Onsekiz Mart Üniversitesi, 2009) Ulaş, Burak; Demircan, OsmanBu çalışmada zonklayan bileşenli Algoller ve diğer çift yıldızların zonklayan bileşenlerinin temel zonklama frekanslarında dönme ve gelgit etkilerinden dolayı meydana gelebilecek etki araştırılmıştır. Matematiksel olarak frekansın ve genliğin kütle oranı, merkez uzaklığı gibi temel niceliklerle değişimi incelenmiş, artan ve azalan frekans değerleri için bu nicelikler birbirileriyle ilişkilendirilmiştir. Teorik modele kanıt aranmış ve gözlemsel veriler çözümlenerek değişik yöntemlerle bu etki kanıtlanmaya çalışılmıştır.
