Zobrazeno 1 - 10
of 187
pro vyhledávání: '"A. Ajabshirizadeh"'
Autor:
A. Ajabshirizadeh, Z. Fazel
Publikováno v:
Iranian Journal of Physics Research, Vol 5, Iss 3, Pp 161-161 (2005)
Gravitational multipole moments of the Sun are still poorly known. Theoretically, the difficulty is mainly due to the differential rotation for which the velocity rate varies both on the surface and with the depth. From an observational point of view
Externí odkaz:
https://doaj.org/article/5c23d9890a4e4f8bbbf03b7cab3a4fce
Wave theories of heating the chromosphere, corona, and solar wind due to photospheric fluctuations are strengthened by the existence of observed wave coherency up to the transition region (TR). The coherency of solar spicules' intensity oscillations
Externí odkaz:
http://arxiv.org/abs/1702.01344
We investigate the role of active region spicules in the mass balance of the solar wind and energy supply for heating the solar atmosphere. We use high cadence observations from the Solar Optical Telescope (SOT) onboard the Hinode satellite in the Ca
Externí odkaz:
http://arxiv.org/abs/1602.03157
Aims. We study the coherency of solar spicules intensity oscillations with increasing height above the solar limb in quiet Sun, active Sun and active region using observations from HINODE/SOT. Existence of coherency up to transition region strengthen
Externí odkaz:
http://arxiv.org/abs/1504.00265
Transversal oscillations of spicules axes may be related to the propagation of magnetohydrodynamic waves along them. These waves may become unstable and the instability can be of the Kelvin-Helmholtz type. We use the dispersion relation of kink mode
Externí odkaz:
http://arxiv.org/abs/1502.04229
Autor:
Pantea Davoudifar, Keihanak Rowshan Tabari, Amir Abbas Eslami Shafigh, Ali Ajabshirizadeh, Zahra Bagheri, Fakhredin Akbarian Tork Abad, Milad Shayan
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-17 (2021)
Abstract Regular and irregular variations in total electron content (TEC) are one of the most significant observables in ionospheric studies. During the solar cycle 24, the variability of ionosphere is studied using global positioning system derived
Externí odkaz:
https://doaj.org/article/5fc7d0aa8a5d4b4abfb009490c00fa48
Publikováno v:
A&A 573, A4 (2015)
Context. For investigating spicules from the photosphere to coronal heights, the new Hinode/SOT long series of high resolution observations from Space taken in CaII H line emission offers an improved way to look at their remarkable dynamical behavior
Externí odkaz:
http://arxiv.org/abs/1409.7654
In this work, we present digital and graphical atlases of spectra of both the solar disk-center and of the limb near the Solar poles using data taken at the UTS-IAP & RIAAM (the University of Tabriz Siderostat, telescope and spectrograph jointly deve
Externí odkaz:
http://arxiv.org/abs/1407.5727
Virial theorem is important for understanding stellar structures. It produces an interesting connection between the magnetic energy and the gravitational one. Using the general form of the virial theorem including the magnetic field (toroidal magneti
Externí odkaz:
http://arxiv.org/abs/1404.3743
Autor:
Fathivavsari, H., Petitjean, P., Ledoux, C., Noterdaeme, P., Srianand, R., Rahmani, H., Ajabshirizadeh, A.
We present a detailed analysis of absorption systems along the line of sight towards QSO PKS 0237-233 using a high resolution spectrum of signal-to-noise ratio (SNR) ~ 60-80 obtained with the Ultraviolet and Visual Echelle Spectrograph mounted on the
Externí odkaz:
http://arxiv.org/abs/1308.0600