Zobrazeno 1 - 10
of 505
pro vyhledávání: '"Safari, Hossein"'
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 learning algorithm to identify and track coronal bright points (CBPs) from t
Externí odkaz:
http://arxiv.org/abs/2407.17594
The regular behavior of the pulsations of high-amplitude Delta Sct (HADS) stars gives a greater chance to investigate the interiors of stars. We analyzed seven HADS stars showing peak-to-peak amplitudes of more than 0.3 mag that were newly observed b
Externí odkaz:
http://arxiv.org/abs/2407.05075
Publikováno v:
Monthly Notices of the Royal Astronomical Society 23 March 2024
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 investigate the asymmetry of Si IV 1393.75 {\AA} of the transition-region
Externí odkaz:
http://arxiv.org/abs/2402.01628
Due to the massive increase in astronomical images (such as James Webb and Solar Dynamic Observatory), automatic image description is essential for solar and astronomical. Zernike moments (ZMs) are unique due to the orthogonality and completeness of
Externí odkaz:
http://arxiv.org/abs/2308.13562
Solar and stellar magnetic patches (i.e., magnetic fluxes that reach the surface from the interior) are believed to be the primary sources of a star's atmospheric conditions. Hence, detecting and identifying these features (also known as magnetic ele
Externí odkaz:
http://arxiv.org/abs/2307.15523
Autor:
Tarana, Somayeh, Alipoura, Nasibe, Roknia, Kourosh, Hosseinib, S. Hadi, Shekoofac, Omid, Safari, Hossein
Solar activities may disturb the geomagnetic field and impact the power grid via geomagnetically induced currents. We study active and reactive powers as well as the power factor of Iran's power grid transformers (230 kV and 400 kV) and their correla
Externí odkaz:
http://arxiv.org/abs/2302.10925
Extraction of characteristics of the complex light curve of pulsating stars is essential for stellar physics. We investigate the complex network (natural and horizontal visibility graphs) properties of the \dsct\ stars light curves observed by \tess.
Externí odkaz:
http://arxiv.org/abs/2302.06904
Autor:
Dinmohammadi, Abolfazl, Heikinheimo, Matti, Mirabolfathi, Nader, Nordlund, Kai, Safari, Hossein, Sassi, Sebastian, Tuominen, Kimmo
Low threshold detectors with single-electron excitation sensitivity to nuclear recoil events in solid-state detectors are also sensitive to the crystalline structure of the target and, therefore, to the recoil direction via the anisotropic energy thr
Externí odkaz:
http://arxiv.org/abs/2301.06592
Quasi-periodic pulsations (QPPs) with various periods that originate in the underlying magnetohydrodynamic processes of the flaring structures are detected repeatedly in the solar flare emissions. We apply a 2D cellular automaton (CA) avalanche model
Externí odkaz:
http://arxiv.org/abs/2208.02493
Autor:
Shokri, Zahra, Alipour, Nasibe, Safari, Hossein, Kayshap, Pradeep, Podladchikova, Olena, Nigro, Giuseppina, Tripathi, Durgesh
We investigate the relationship between different transients such as blinkers detected in images taken at 304~{\AA}, extreme ultraviolet coronal bright points (ECBPs) at 193~{\AA}, X-ray coronal bright points (XCBPs) at 94~{\AA} on AIA, and magnetic
Externí odkaz:
http://arxiv.org/abs/2201.04459