106 citations · 375 across the 18 of their papers we have counts for
8 papers · 1 filter
New absolute magnitude calibrations for W Ursa Majoris type binaries
Z. Eker, S. Bilir, E. Yaz +2
Parallaxes of W UMa stars in the Hipparcos catalogue have been analyzed. 31 W UMa stars, which have the most accurate parallaxes () which are neither associated with a…
Absolute Dimensions and Apsidal Motion of the Eccentric Binary V731 Cephei
V. Bakis, M. Zejda, I. Bulut +7
A detailed analysis of new and existing photometric, spectroscopic and spatial distribution data of the eccentric binary V731 Cep was performed. Spectroscopic orbital elements of t…
A catalog of chromospherically active binary stars (third edition)
Z. Eker, N. Filiz Ak, S. Bilir +8
Chromospherically Active Binaries (CAB) catalogue have been revised and updated. With 203 new identifications, the number of CAB stars is increased to 409. Catalogue is available i…
Estimation of galactic model parameters in high latitudes with SDSS
S. Bilir, A. Cabrera-Lavers, S. Karaali +3
We estimated the Galactic model parameters for a set of 36 high-latitude fields included in the currently available Data Release 5 (DR 5) of the Sloan Digital Sky Survey ({\em SDSS…
Estimation of Galactic model parameters in high latitudes with 2MASS
A. Cabrera-Lavers, S. Bilir, S. Ak +2
In this paper, we try to find any dependence of the Galactic structural parameters with the Galactic longitude for either the thin disc or the thick disc of the Milky Way, that wou…
Kinematics, ages and metallicities for F and G type stars in the solar neighbourhood
Y. Karatas, S. Bilir, W. J. Schuster
A new metallicity distribution and an age-metallicity relation are presented for 437 nearby F and G turn-off and sub-giant stars selected from radial velocity data of Nidever et al…
Absolute magnitudes for late-type dwarf stars for Sloan photometry
S. Bilir, S. Karaali, S. Tuncel
We present a new formula for absolute magnitude determination for late-type dwarf stars as a function of (g-r) and (r-i) for Sloan photometry. The absolute magnitudes estimated by…
Extragalactic Objects in Basle Fields
S. Bilir, Y. Karatas, S. Ak
We discriminated the extragalactic objects (galaxies and quasars) from stars for Basle star fields, Plaut I, SA 54, and SA 82 by comparison of Basle fields and APS POSS I finder ch…