Fizik Bölümü Koleksiyonu: Recent submissions
Now showing items 21-40 of 42
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Application of quantum self-frictional nonperturbative theory for the study of atomic anharmonic oscillator potentials and their arbitrary derivatives
(Springer, 2021)The self-frictional (SF) nonperturbative theory, introduced by one of the authors, is used for the evaluation of the V-(pl*()) and V-(alpha*) atomic anharmonic oscillator potentials and their derivatives, where p(l)* = 2l ... -
Catalog of W UMa type binary systems with additional components based on eclipsing time variations
(Elsevier B.V., 2022)A catalog of W UMa type eclipsing binary systems with tertiary components based on eclipse timing diagrams is presented listing the physical and orbital parameters (including third body parameters) of 150 W UMa type eclipsing ... -
Optical counterparts of ULXs in two dwarf galaxies: NGC 4861 and NGC 4449
(Oxford University Press, 2021)We present the results of a search for optical candidates of ultraluminous X-ray sources (ULXs) in two dwarf galaxies, NGC 4861 and NGC 4449, using Hubble Space Telescope (HST) archival data. With precise astrometry, we ... -
New light curve analysis and period changes of the HW Vir-type binary system V1828 Aql
(Elsevier B.V., 2022)The new BVRI photometric observations of the HW Vir-type eclipsing binary system V1828 Aql (P = 0.11037399 days) were presented. From these measurements, 16 new eclipse times have been obtained. The light curves in BVRI ... -
First photometric study of two eclipsing binary star systems: V523 And and V543 And
(Elsevier B.V., 2022)Detailed photometric analysis of V523 And and V543 And from the Wide Angle Search for Planets survey is presented for the first time. It was found that while V523 And is a detached binary, V543 And is a semi-detached binary ... -
The ultra-hot-Jupiter KELT-16 b: dynamical evolution and atmospheric properties
(Oxford University Press, 2022)We present broad-band photometry of 30 planetary transits of the ultra-hot-Jupiter KEL T -16 b, using five medium-class telescopes. The transits were monitored through standard B, V , R, I filters and four were simultaneously ... -
Mass transfer and tidally tilted pulsation in the Algol-type system TZ Dra
(Oxford University Press, 2022)Oscillating eclipsing Algols (oEAs) are remarkable systems that allow us to determine accurate fundamental stellar parameters (mass, radius) and probe the stellar interiors through pulsations. TZ Dra is an oEA system ... -
Heat flow enhancement in a nanoscale plasmonic junction induced by Kondo resonances and electron-phonon coupling
(Elsevier, 2021)Recently, we showed that plasmon-exciton coupling can increase entropy current through a bridge coupled to plasmonic metal nanoparticles. Here we show that electron-phonon coupling can also be used to control the entropy ... -
Optimization of chemically sprayed ZnS films by Mn doping
(Elsevier, 2021)In this study, undoped and Mn doped ZnS films were grown on microscope glass substrates at substrate tem- perature of 400 ± 5 ◦C by using a low cost Ultrasonic Spray Pyrolysis technique, and the effect of Mn doping on some ... -
Quantitative Phase Imaging of Thin Film Surface
(Polish Acad Sciences Inst Physics, 2021)In this study, the white light diffraction phase microscopy and the generalized Morse wavelet are proposed to achieve practical and precise measurement of a thin film surface. The white light diffraction phase microscopy ... -
Axial-vector nucleon-to-delta transition form factors using the complex-mass renormalization scheme
(American Physical Society, 2021)We investigate the axial-vector nucleon-to-delta transition form factors in the framework of relativistic baryon chiral perturbation theory at the one-loop order using the complex-mass renormalization scheme. We determine ... -
An investigation of the causal relationship between sunspot groups and coronal mass ejections by determining source active regions
(Royal Astronomical Society, 2021)Although the source active regions of some coronal mass ejections (CMEs) were identified in CME catalogues, vast majority of CMEs do not have an identified source active region. We propose a method that uses a filtration ... -
On the zero point constant of the bolometric correction scale
(Oxford University Press, 2021)Arbitrariness attributed to the zero-point constant of the V-band bolometric corrections (BCV) and its relation to ‘bolometric magnitude of a star ought to be brighter than its visual magnitude’ and ‘bolometric corrections ... -
Cylindrically symmetric unimodular f(R) black holes
(World Scientific Publishing, 2021)In this paper, we examine massless scalar field by using unimodular f(R) theory. It is taken into account unimodular and cylindrically symmetric spacetime which provides convenience in researching black hole. The field ... -
The First Light Curve Solutions and Period Study of BQ Ari
(Springer, 2021)The first analysis of the photometric observation in BVR filters of a W UMa type binary system BQ Ari was performed. Light curve analysis was performed using Wilson-Devinney (W-D) code combined with a Monte Carlo (MC) ... -
Optimization applied to selected exoplanets
(Springer, 2021)Transit and radial velocity models were applied to archival data in order to examine exoplanet properties, in particular for the recently discovered super-Earth GJ357b. There is however considerable variation in estimated ... -
A tidally tilted sectoral dipole pulsation mode in the eclipsing binary TIC 63328020
(Oxford University Press, 2021)We report the discovery of the third tidally tilted pulsator, TIC 63328020. Observations with the TESS satellite reveal binary eclipses with an orbital period of 1.1057 d, and δ Scuti-type pulsations with a mode frequency ... -
Standard stellar luminosities: what are typical and limiting accuracies in the era after Gaia?
(Oxford University Press, 2021)Methods of obtaining stellar luminosities (L) have been revised and a new concept, standard stellar luminosity, has been defined. In this paper, we study three methods: (i) a direct method from radii and effective temperatures; ... -
Can Solar Cycle 25 Be a New Dalton Minimum?
(Springer, 2021)The aim of this study is to predict solar activity for the next 10 years (Solar Cycle 25) using a deep learning technique known as a stateful Long Short-Term Memory (LSTM) network. To achieve this goal the number of daily ... -
BVRI Photometric Observations, Light Curve Solutions and Orbital Period Analysis of BF Pav
(IOP Publishing, 2021)A new ephemeris, period change analysis and light curve modeling of the W UMa-type eclipsing binary BF Pav are presented in this study. Light curves of the system taken in BVRI filters from two observatories, in Australia ...
