27 citations · 75 across the 13 of their papers we have counts for
14 papers
The structure and evolution of the Galactic high- disc I. Chemical and age orbital cartography
Furkan Akbaba, Danny Horta, Olcay Plevne
We present a comprehensive chemical and age orbital cartography of the Galactic high- disc using subgiant stars with precise ages, element abundances, and full phase-space infor…
Estimating Initial Mass of Gaia-Enceladus Dwarf Galaxy with Chemical Evolution Model
Olcay Plevne, Furkan Akbaba
This work investigates the initial mass and chemical evolution history of the Gaia-Enceladus dwarf galaxy. We combine spectroscopic data from APOGEE with astrometric data from Gaia…
A Comprehensive Study of Czernik 41 and NGC 1342 Using CCD UBV and Gaia DR3 Data
B. Tanik Ozturk, S. Bilir, T. Yontan +5
In this study, the structural, astrophysical, kinematic, and Galactic orbital parameters of the open clusters Czernik 41 and NGC 1342, as well as their dynamical evolution, are inv…
A Multi-Data Approach to Open Clusters: Roslund 3 and Ruprecht 174 in CCD UBV and Gaia DR3 Context
H. Karagoz, T. Yontan, S. Bilir +5
A detailed analysis of the structural, astrophysical, kinematic, and dynamical properties of the open clusters Roslund 3 and Ruprecht1 74 is carried out using CCD UBV photometry in…
Stellar Ancestry Unlocked: Chemical and Orbital Clues Link Metal Poor Stars to Globular Clusters and the Galaxy's Thick Disk
Gizay Yolalan, Timur Şahin, Selçuk Bilir +1
This study presents a detailed chemical, kinematic, and orbital dynamic analysis of five metal poor stars in the solar neighborhood: HD 2665, HD 5916, HD 122956, HD 189349, and HD…
Tracing the Galactic Origins of Selected Four G-type Stars in the Solar Neighbourhood
Deniz Cennet Çınar, Selçuk Bilir, Timur Şahin +1
We present a multi-method investigation of four metal-poor G-type main-sequence stars to resolve their Galactic origins. By combining high-resolution spectroscopy from PolarBase, p…
Spectroscopic and Dynamic Orbital Analyses of Metal-Poor and High Proper Motion Stars: I. HD\,8724 and HD\,195633
M. Marismak, T. Sahin, F. Guney +2
In this study, spectral, age, kinematic, and orbital dynamical analyses were conducted on metal-poor and high proper-motion (HPM) stars, HD 8724 and HD 195633, selected from the So…
Bridging the Ultraviolet and Optical Regions: Transformation Equations between {\it GALEX} and {\it UBV} Photometric Systems
S. Bilir, N. Alan, S. Tuncel Guctekin +6
We derive transformation equations between GALEX and UBV colours by using the reliable data of 556 stars. We present two sets of equations; as a function of (only) luminosity class…
Analysis of the disc components of our Galaxy via kinematic and spectroscopic procedures
S. Karaali, S. Bilir, E. Yaz Gokce +1
We used the spectroscopic and astrometric data provided from the GALAH DR2 and Gaia DR2, respectively, for a large sample of stars to investigate the behaviour of the [/Fe] abun…
Vertical and radial metallicity gradients in high latitude galactic fields with SDSS
S. Tuncel Guctekin, S. Bilir, S. Karaali +2
We used the ugr magnitudes of 1,437,467 F-G type main-sequence stars with metal abundance -2<[Fe/H]<+0.2 dex and estimated radial and vertical metallicity gradients for high Galact…
Local Stellar Kinematics from RAVE data -- VIII. Effects of the Galactic Disc Perturbations on Stellar Orbits of Red Clump Stars
O. Onal Tas, S. Bilir, O. Plevne
We aim to probe the dynamic structure of the extended Solar neighbourhood by calculating the radial metallicity gradients from orbit properties, which are obtained for axisymmetric…
Photometric Calibration of the Fe] Element: II. Calibration with SDSS Photometry
E. Yaz Gokce, S. Bilir, S. Karaali +1
We present the calibration of the [Fe] element in terms of ultra-violet excess for 465 dwarf stars with spectral type F0-K2. We used a single calibration, fitted to a third deg…
Metallicity Calibration and Photometric Parallax Estimation: II. SDSS photometry
S. Tuncel Guctekin, S. Bilir, S. Karaali +4
We used the updated [Fe/H] abundances of 168 F-G type dwarfs and calibrated them to a third order polynomial in terms of reduced ultraviolet excess, defined with d…
Local Stellar Kinematics from RAVE data - VI. Metallicity Gradients Based on the F-G Main-sequence Stars
O. Plevne, T. Ak, S. Karaali +3
We estimated iron and metallicity gradients in the radial and vertical directions with the F and G type dwarfs taken from the RAVE DR4 database. The sample defined by the constrain…