Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Çalışkan, Seyma"'
We present chemical abundances of the very bright metal-poor star HD~1936 based on high-resolution and high SNR spectra from AUKR. We obtain the abundances of 29 atomic species with atomic numbers between 3 and 63. In this context, the derived lithiu
Externí odkaz:
http://arxiv.org/abs/2402.09840
Autor:
Nasolo, Yahya, Çalışkan, Şeyma
We present a chemical abundance analysis of seven A-type stars with no detailed chemical abundance measurements in the literature. High-resolution spectra of the targets HD 2924, HD 4321, HD 26553, HD 125658, HD 137928, HD 154713, and HD 159834 were
Externí odkaz:
http://arxiv.org/abs/2303.00584
The existence of an additional body around a binary system can be detected by the help of the light-travel time effect. Due to the motions of binary and the companion stars around the common mass center of the ternary system, the light-time effect pr
Externí odkaz:
http://arxiv.org/abs/1808.07920
Publikováno v:
The Astrophysical Journal, 852:116 (5pp), 2018
To understand the origin of the abundance peculiarities of non-magnetic A-type stars, we present the first detailed chemical abundance analysis of a metallic line star HD 23193 (A2m) and an A-type subgiant HD 170920 (A5) which could have been a HgMn
Externí odkaz:
http://arxiv.org/abs/1801.00492
Publikováno v:
IJRST, 2017, Vol. No. 7, Issue No. III, Jul-Sep, e-ISSN: 2249-0604, p-ISSN: 2454-180X
We present the more refined abundances of elements (C, O, Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Ni, Zn, Sr, Y, Zr and Ba) determined using the computationally intensive ATLAS12 atmosphere model for the metallic-line stars Pi Dra and HR 7545. We
Externí odkaz:
http://arxiv.org/abs/1710.09570
Autor:
Elmasli, Asli, Caliskan, Seyma, Kilicoglu, Tolgahan, Unal, Kubraozge, Nasolo, Yahya, Albayrak, Berahitdin
The atmospheric parameters and chemical abundances of two neglected A-type stars, 28 Peg and HD 202240, were derived using high resolution spectra obtained at the TUBITAK National Observatory. We determined the photospheric abundances of eleven eleme
Externí odkaz:
http://arxiv.org/abs/1507.00475
Akademický článek
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While recent sky surveys have uncovered large numbers of ever fainter Milky Way satellites, their classification as star clusters, low-luminosity galaxies, or tidal overdensities remains often unclear. Likewise, their contributions to the build-up of
Externí odkaz:
http://arxiv.org/abs/1109.1838
Publikováno v:
In New Astronomy July 2018 62:15-19
Autor:
Elmaslı, Aslı, Çalışkan, Şeyma, Kılıçoğlu, Tolgahan, Ünal, Kübraözge, Nasolo, Yahya, Albayrak, Berahitdin
Publikováno v:
In New Astronomy January 2016 42:38-41