4 papers
A complex network approach to TESS light curves of Sct stars
E. Ziaali, S. de Franciscis, J. Pascual-Granado +4
By using the horizontal visibility algorithm, the TESS light curves of 69 delta Sct stars are mapped to undirected horizontal visibility graphs (HVGs), where the graph nodes repres…
Galaxy Morphological Classification with Zernike Moments and Machine Learning Approaches
Hamed Ghaderi, Nasibe Alipour, Hossein Safari
Classifying galaxies is an essential step for studying their structures and dynamics. Using GalaxyZoo2 (GZ2) fractions thresholds, we collect 545 and 11,735 samples in non-galaxy a…
Solar rotation and activity for cycle 24 from SDO/AIA observations
Zahra Shokri, Nasibe Alipour, Hossein Safari
The differential rotation plays a crucial role in the dynamics of the Sun. We study the solar rotation and its correlation with solar activity by applying a modified machine learni…
Asymmetry of the spectral lines of the coronal hole and quiet Sun in the transition region
Razieh Hosseini, Pradeep Kayshap, Nasibe Alipour +1
The asymmetry of line profiles, i.e., the secondary component, is crucial to understanding the energy release of coronal holes (CH), quiet sun (QS), and bright points (BPs). We inv…