Zobrazeno 1 - 10
of 7 429
pro vyhledávání: '"Bilir, A."'
{We present the radial metallicity gradients within the Galactic thin disc population through main-sequence stars selected on the chemical plane using GALAH DR3 accompanied with Gaia DR3 astrometric data. The [Fe/H], [$\alpha$/Fe] and [Mg/H] radial g
Externí odkaz:
http://arxiv.org/abs/2411.13660
Determining the physical nature of a star requires precise knowledge of its stellar atmospheric parameters, including effective temperature, surface gravity, and metallicity. This study presents a new atomic line list covering a broad spectral range
Externí odkaz:
http://arxiv.org/abs/2410.08270
Autor:
Çakmak, Hikmet, Yontan, Talar, Bilir, Selçk, Banks, Timothy S., Michel, Raúl., Soydugan, Esin, Koç, Seliz, Erçay, Hülya
This study outlines a detailed investigation using CCD {\it UBV} and {\it Gaia} DR3 data sets of the two open clusters Ruprecht 1 (Rup-1) and Ruprecht 171 (Rup-171). Fundamental astrophysical parameters such as color excesses, photometric metalliciti
Externí odkaz:
http://arxiv.org/abs/2409.02298
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 Solar neighborhood. This analysis combines detailed abundance measuremen
Externí odkaz:
http://arxiv.org/abs/2406.17776
Eclipsing binary systems are significant objects for astrophysics in that direct observations can determine the fundamental parameters of stars. In this study, we determined precisely the fundamental parameters of the binary component stars obtained
Externí odkaz:
http://arxiv.org/abs/2406.00097
Autor:
Kebapci, T. Y., Parlatan, S., Sert, S., Ozturk, I. K., Basar, G., Sahin, T., Bilir, S., Ferber, R., Tamanis, M., Kroger, S.
The hyperfine structure of 40 spectral lines of singly ionized thulium (Tm II) in emission spectra from a hollow cathode discharge lamp measured with a Fourier transform spectrometer in the wavelength range from 335 nm to 2345 nm has been investigate
Externí odkaz:
http://arxiv.org/abs/2405.05309
Developments on various relations among stellar variables such as the main sequence empirical mass-luminosity (MLR), mass-radius (MRR) and mass-effective temperature (MTR) relations were reviewed. Conceptual changes in their understanding and usages
Externí odkaz:
http://arxiv.org/abs/2402.07947
A detailed analysis of ground-based CCD UBV photometry and space-based Gaia Data Release 3 (DR3) data for the open clusters King 6 and NGC 1605 was performed. Using the pyUPMASK algorithm on Gaia astrometric data to estimate cluster membership probab
Externí odkaz:
http://arxiv.org/abs/2311.00054
We propose a line list that may be useful for the abundance analysis of G-type stars in the wavelength range 4080 -- 6780 A. It is expected that the line list will be useful for surveys/libraries with overlapping spectral regions (e.g. ELODIE/SOPHIE
Externí odkaz:
http://arxiv.org/abs/2310.04129
We perform extensive spectroscopy of the supernova remnant N63A in the Large Magellanic Cloud, using $\sim 43$ ks {\it Chandra} archival data. By analysing the spectra of the entire remnant, we determine the abundance distributions for O, Ne, Mg, Si,
Externí odkaz:
http://arxiv.org/abs/2305.03084