-
241
A Near-half-century Simulation of the Solar Corona
Published 2024-01-01“…The simulation self-consistently reproduces decades of solar phenomena, varying in duration between rapid eruptions and the long-term solar cycles, from an input of observed active regions emerging at the photosphere. We have developed a geometric approach to use magnetic helicity to identify and localize the frequent eruptions that occur in the simulation. …”
Get full text
Article -
242
Optical Appearance of Eccentric Tidal Disruption Events
Published 2024-01-01“…Assuming electron scattering opacity, this material would be visible as a ∼100 au photosphere at ∼10 ^4 K, in line with observations of candidate TDEs.…”
Get full text
Article -
243
Accretion shock stability on a dynamically heated YSO atmosphere with radiative transfer
Published 2014-01-01“…Theory and simulations predict Quasi-Periodic Oscillations of shocks which develop in magnetically driven accretion funnels connecting the stellar disc to the photosphere of Young Stellar Objects (YSO). X-ray observations however do not show evidence of the expected periodicity. …”
Get full text
Article -
244
Study on the relation of the solar coronal rotation with magnetic field structures
Published 2023-11-01“…Furthermore, this study presents an explanation for the inconsistent results for the coronal rotation issue among the previous studies, and also reveals the reason why the coronal atmosphere rotates faster than the lower photosphere.…”
Get full text
Article -
245
Studying the relationship of localization parameters of solar sources of magnetic clouds with their characteristics and substorm activity
Published 2019-09-01“…We propose a method for determining location and orientation of extended solar sources of magnetic clouds, using coronagraph data and SOHO EIT/MDI images of the photosphere. To estimate the probability of formation of magnetic clouds, we use a simple cylindrical force-free model. …”
Get full text
Article -
246
Magnetic Fields in the Solar Convection Zone
Published 2004-07-01“…Thus the magnetic fields need to traverse the entire convection zone before they reach the photosphere to form the observed solar active regions. …”
Get full text
Article -
247
The Evolution of Research on Abundances of Solar Energetic Particles
Published 2021-08-01“…On average, gradual SEP events give us a measure of element abundances in the solar corona, which differ from those in the photosphere as a classic function of the first ionization potential (FIP) of the elements, distinguishing ions and neutrals. …”
Get full text
Article -
248
GRB 220304A: Another Gamma-Ray Burst Dominated by Thermal Radiation
Published 2024-01-01“…It is reminiscent of GRB 090902B, a special GRB with photosphere radiation characteristics. Then, we perform spectral analysis using the Planck function (blackbody, BB) and the multicolor BB model. …”
Get full text
Article -
249
Solar Flares: Magnetohydrodynamic Processes
Published 2011-12-01“…The evolution toward the onset of a flare is rather quasi-static when free energy is accumulated in the form of coronal electric current (field-aligned current, more precisely), while the dissipation of coronal current proceeds rapidly, producing various dynamic events that affect lower atmospheres such as the chromosphere and photosphere. Flares manifest such rapid dissipation of coronal current, and their theoretical modeling has been developed in accordance with observations, in which numerical simulations proved to be a strong tool reproducing the time-dependent, nonlinear evolution of a flare. …”
Get full text
Article -
250
Causal relationships between eruptive prominences and coronal mass ejections
Published 2008-10-01“…A twisted flux rope is held by the tension of field lines of photospheric sources until parameters of the system reach critical values and a catastrophe happens. …”
Get full text
Article -
251
Transitions in the cloud composition of hot Jupiters
Published 2016“…The cold trapping of cloud species below the photosphere naturally produces such a transition and predicts similar transitions for other condensates, including TiO. …”
Journal article -
252
On the tidal interaction of a solar-type star with an orbiting companion: Excitation of g mode oscillation and orbital evolution
Published 1998“…We compute the torque exerted on the star by a companion in circular orbit, and determine the potentially observable magnitude of the tidally induced velocity at the stellar photosphere. These calculations are compared with the results obtained by assuming that a very small frequency limit can be taken in order to calculate the tidal response (equilibrium tide). …”
Journal article -
253
Weak seasonality on temperate exoplanets around low-mass stars
Published 2022“…At the infrared emission level in the photosphere, the relative amplitudes of thermal flux and temperature perturbations are negligible, and their phase lags are closed to −90° for Jupiter-like planets around very low mass stars. …”
Journal article -
254
Pulsation-induced Spectroscopic Variability of IRAS Z02229+6208
Published 2023-01-01“…Strong and broad CN red system lines, blueshifted up to 9.4 km s ^−1 relative to the stellar photosphere, are seen near the light minimum. Near the light maxima, the molecular features are weak and most of them are in emission, e.g., broad emissions in the CN red system (0,0) lines are seen. …”
Get full text
Article -
255
Model Constraints Based on the IceCube Neutrino Nondetection of GRB 221009A
Published 2023-01-01“…We find that, at least for this specific burst, the dissipative photosphere model could be ruled out in a large parameter space. …”
Get full text
Article -
256
Processes and mechanisms governing the initiation and propagation of CMEs
Published 2008-10-01“…Special attention is paid to 3-dimensional (3-D) topology of the magnetic field structures, particularly to aspects related to the concept of semi-toroidal flux-rope anchored at both ends in the dense photosphere and embedded in the coronal magnetic arcade. …”
Get full text
Article -
257
Episodes of Molecular Emission in the Optical Spectrum of IRAS 22272+5435
Published 2023-01-01“…It is proposed that the observed emissions originate within few stellar radii above the photosphere.…”
Get full text
Article -
258
Coronal Field Geometry and Solar Wind Speed
Published 2022-12-01“…The second input parameter for the WSA model is the great circle distance from the base of the open magnetic field line in the photosphere to the boundary of the corresponding coronal hole (DCHB). …”
Get full text
Article -
259
Comparing results of real-scale time MHD modeling with observational data for first flare M 1.9 in AR 10365
Published 2022-02-01“…However, apparently due to small disturbance, propagating from the photosphere, sufficient magnetic energy was not accumulated in this configuration, so the NoRH does not show the flare source of emission at the frequency 17 GHz in the place, where this singular line is situated.…”
Get full text
Article -
260
Synoptic solar observations of the Solar Flare Telescope focusing on space weather
Published 2020-01-01“…Data for the brightness, Doppler signal, and magnetic field information of the photosphere and the chromosphere are obtained. In addition to monitoring dynamic phenomena like flares and filament eruptions, we can track the evolution of the magnetic fields that drive them on the basis of these data. …”
Get full text
Article