12 citations · 45 across the 5 of their papers we have counts for
5 papers
Study of the Open Clusters in Kepler Prime Field
Yüksel Karataş, Hikmet Çakmak, İnci Akkaya Oralhan +3
We present a detailed study of NGC 6791, NGC 6811, NGC 6819 and NGC 6866, the four open clusters that are located in the Kepler prime field. We use new CCD UBV(RI)KC photometry, wh…
A semi-automated method to reveal the evolution of each sunspot group in a solar cycle
Hikmet Çakmak
Sunspots are the most important indicator of the magnetic activity on the solar surface during a cycle. Every sunspot group is formed and shaped by the magnetic field of the Sun. H…
Computer-aided measurement of the heliographic coordinates of sunspot groups
H. Cakmak
Heliographic coordinates are used to identify the positions of solar features, especially the sunspot groups on the Sun's surface. Tracking the positions of sunspot groups provides…
A digital method to calculate the true areas of sunspot groups
H. Cakmak
The areas of sunspots are the most prominent feature of the development of sunspot groups. Since the size of sunspot areas depend on the strength of the magnetic field, accurate me…
Luminosity-Colour Relations for Red Clump Stars
S. Bilir, O. Onal, S. Karaali +2
We calibrated the , , and absolute magnitudes of red clump stars in terms of colours. and are strongly dependent on colour, while the dependen…