Zobrazeno 1 - 10
of 298
pro vyhledávání: '"Karaali S"'
Autor:
Bilir, S., Alan, N., Guctekin, S. Tuncel, Celebi, M., Yontan, T., Plevne, O., Ak, S., Ak, T., Karaali, S.
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, and as a function of both luminosity class and metallicity. The meta
Externí odkaz:
http://arxiv.org/abs/2004.05605
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 [$\alpha$/Fe] abundances via two procedures, i.e. kinematically and spectroscopical
Externí odkaz:
http://arxiv.org/abs/1909.02767
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 Galactic-latitude fields (b>50) of the Milky Way Galaxy. The radial metallic
Externí odkaz:
http://arxiv.org/abs/1810.12371
We present the calibration of the [$\alpha/$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 degree polynomial with a square of the correlation coefficient 0.74
Externí odkaz:
http://arxiv.org/abs/1708.08839
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, $\delta_{0.41}$ defined with $ugr$ data in the SDSS. We estimated the $M_g$ absolute magnitudes for t
Externí odkaz:
http://arxiv.org/abs/1611.08095
We present the calibration of the [$\alpha$/Fe] element in terms of the ultra-violet excess for 469 dwarf stars with $0.325<(B-V)_0 \leq 0.775$ mag corresponding the spectral type range F0-K2. The star sample is separated into nine sub-samples with e
Externí odkaz:
http://arxiv.org/abs/1609.04326
We investigate the Milky Way Galaxy's radial and vertical metallicity gradients using a sample of 47,406 red clump stars from the RAVE DR4. This sample is more than twice the size of the largest sample in the literature investigating radial and verti
Externí odkaz:
http://arxiv.org/abs/1607.07049
We present metallicity and photometric parallax calibrations for the F and G type dwarfs with photometric, astrometric and spectroscopic data. The sample consists of 168 dwarf stars covering the colour, iron abundance and absolute magnitude intervals
Externí odkaz:
http://arxiv.org/abs/1605.02225
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 constraints Zmax<=825 pc and ep<=0.10 consists of stars with metal abundances a
Externí odkaz:
http://arxiv.org/abs/1510.01749
Autor:
Gokce, E. Yaz, Karaali, S., Duran, S., Bilir, S., Yalcinkaya, A., Ak, S., Ak, T., Lopez-Corredoira, M., Cabrera-Lavers, A.
We estimated the scale-length of the thin disc with the J and W1 magnitudes of the most probable Red Clump (RC) stars in the Galactic plane, $-0\overset{^\circ}.5 \leq b \leq +0\overset{^\circ}.5$, in 19 equal sized fields with consecutive Galactic l
Externí odkaz:
http://arxiv.org/abs/1503.01781