Astrophysics and Star Formation Studies

We collect data on the masses, radii, etc., of three classes of close binary stars: low-temperature contact binaries (LTCBs), near-contact binaries (NCBs), and detached close binaries (DCBs). We restrict ourselves to systems in which (1) both components are, at least arguably, near the main sequence, (2) the periods a…

• KADRİ YAKUT

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• NAZLI KARAMAN

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• AFŞAR KABAŞ
• YAVUZ GÜNEY

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• CAHİT YEŞİLYAPRAK
• OZAN ÜNSALAN

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• CAHİT YEŞİLYAPRAK

We review the results of the 1988 multiwavelength campaign on the late-type eclipsing binary YY Geminorum. Observations include: broad-band optical and near-infrared photometry, simultaneous optical and ultraviolet (IUE) spectroscopy, X-ray (Ginga) and radio (VLA) data. From models fitted to the optical light curves,…

• NACİ ERKAN

We present the results of a search through the photometric database of Kepler eclipsing binaries looking for evidence of hierarchical triple-star systems. The presence of a third star orbiting the binary can be inferred from eclipse timing variations. We apply a simple algorithm in an automated determination of the ec…

• BELİNDA KALOMENİ YAKUT

Recently the number of main-sequence and subgiant stars exhibiting solar-like oscillations that are resolved into individual mode frequencies has increased dramatically. While only a few such data sets were available for detailed modeling just a decade ago, the Kepler mission has produced suitable observations for hun…

• ZEYNEP ÇELİK ORHAN

Recently the number of main-sequence and subgiant stars exhibiting solar-like oscillations that are resolved into individual mode frequencies has increased dramatically. While only a few such data sets were available for detailed modeling just a decade ago, the Kepler mission has produced suitable observations for hun…

• MUTLU YILDIZ

We study the dynamical evolution of globular clusters using our two-dimensional Monte Carlo code with the inclusion of primordial binary interactions for equal-mass stars. We use approximate analytical cross sections for energy generation from binary-binary and binary-single interactions. After a brief period of sligh…

• MEHMET ATAKAN GÜRKAN

The mass–luminosity ( ), mass–radius ( ), and mass–effective temperature ( ) diagrams for a subset of galactic nearby main-sequence stars with masses and radii accurate to and luminosities accurate to (268 stars) has led to a putative discovery. Four distinct mass domains have been identified, which we have tentativel…

• ESMA YAZ GÖKÇE

The mass–luminosity ( ), mass–radius ( ), and mass–effective temperature ( ) diagrams for a subset of galactic nearby main-sequence stars with masses and radii accurate to and luminosities accurate to (268 stars) has led to a putative discovery. Four distinct mass domains have been identified, which we have tentativel…

• MEHMET TÜYSÜZ