Ilık soğurganların kataklismik değişkenlerde ve x-ışını çift yıldız sistemlerinde incelenmesi

Aydemir, Turgut
Balman, Şölen
Pekön, Yakup
Our project is mainly on studying warm absorbers and complicated ionized and cold absorption in Cataclysmic Binaries and Low-mass and High mass X-ray binaries. Our other aims was to particularly understand and follow the X-ray evolution of classical novae (subclass of Cataclysmic Variables) during the outburst phases and study how the emission components change in time. A new approach in this project will be to study the white dwarf atmospheric emission during the hot phases of the evolution using the warm absorber and collisionally ionized absorber models. As it stands in the literature the analysis of the high resolution X-ray spectroscopy of Nova in outburst is very inadequate. In addition, in some particularly magnetic Cataclysmic Variables which shows complex absorption characteristics we plan to apply warm absorber models to explain the absorption properties and shed light into the light variations that can not be explained by mass transfer variations. This may well explain the orbital modulations in Intermediate Polar magnetic Cataclysmic Variables. We also plan to study warmabsorbers in Low-mass X-ray binaries by using timing techniques that are newly develped and try to ensemble the location of the absorbers in these systems and also look for any warmabsorber effects in High-mass X-ray binaries. In addition we plan to follow the X-ray evolution of Novae during the outburst stage with the ongoing X-ray missions in large collaborations.


X-ray analysis of high mass x-ray binary pulsars
Şahiner, Şeyda; Baykal, Altan; İnam, Sıtkı Çağdaş; Department of Physics (2015)
In this thesis, X-ray properties of three high mass X-ray binary (HMXB) pulsars are analysed, using the data of X-ray satellites such as RXTE, INTEGRAL and Swift. Selected sources belong to different subgroups of the HMXB family. The first system, 4U 1907+09 is a classical wind-fed supergiant system with persistent X-ray emission; although it shows irregular flares and dips. SWIFT J1729.9-3437 and SWIFT J0513.4-6547 are newly discovered transient systems. Although the counterpart of SWIFT J1729.9-3437 could...
Properties of light and heavy baryons in light cone qcd sum rules formalism
Azizi, Kazem; Özpineci, Altuğ; Department of Physics (2009)
In this thesis, we investigate the masses, form factors and magnetic dipole moments of some light octet, decuplet and heavy baryons containing a single heavy quark in the framework of the light cone QCD sum rules. The magnetic dipole moments can be measured considering radiative transitions within a multiplet or between multiplets. Analyzing the transitions among the baryons and calculating the above mentioned parameters can give us insight into the structure of those baryons. In analyzing the aforementione...
Combinatorial study of hydrogen storage alloys
Ölmez, Rabia; Öztürk, Tayfur; Department of Metallurgical and Materials Engineering (2009)
A combinatorial study was carried out for hydrogen storage alloys which involve processes similar to those normally used in their fabrication. The study utilized a single sample of combined elemental (or compound) powders which were milled and consolidated into a bulk form and subsequently deformed to heavy strains. Material library was obtained in a post annealing treatment carried out at elevated temperatures which brings about solid state reactions between the powders yielding equilibrium phases in the r...
Acceleration of molecular dynamics simulation for TERSOFF2 potential through reconfigurable hardware
Vargün, Bilgin; Erkoç, Şakir; Eminoğlu, Selim; Department of Micro and Nanotechnology (2012)
In nanotechnology, Carbon Nanotubes systems are studied with Molecular Dynamics Simulation software programs investigating the properties of molecular structure. Computational loads are very complex in these kinds of software programs. Especially in three body simulations, it takes a couple of weeks for small number of atoms. Researchers use supercomputers to study more complex systems. In recent years, by the development of sophisticated Field Programmable Gate Array (FPGA) Technology, researchers design s...
A MEMS thermoelectric energy harvester for energy generation in mobile systems
Topal, Emre Tan; Külah, Haluk; Balkan, Raif Tuna; Department of Micro and Nanotechnology (2011)
In this thesis design, optimization, fabrication and performance characterization of MEMS thermoelectric (TE) energy harvesters for harnessing waste heat in mobile systems are presented. As a proof of concept, chromium and nickel are used as the thermoelectric material in the proposed design. The feasibility of the state of the art thermoelectric materials is also discussed. MEMS TE energy harvesters proposed in this study are designed to generate power at relatively lower ΔT values. The performance of the ...
Citation Formats
T. Aydemir, Ş. Balman, and Y. Pekön, “Ilık soğurganların kataklismik değişkenlerde ve x-ışını çift yıldız sistemlerinde incelenmesi,” 2012. Accessed: 00, 2020. [Online]. Available: