296 citations · 1.5k across the 42 of their papers we have counts for
10 papers · 1 filter
Effects of Solar Active Regions on Meridional Flows
Michal Svanda, Alexander G. Kosovichev, Junwei Zhao
The aim of this paper is to extend our previous study of the solar-cycle variations of the meridional flows and to investigate their latitudinal and longitudinal structure in the s…
Validating Time-Distance Far-side Imaging of Solar Active Regions through Numerical Simulations
Thomas Hartlep, Junwei Zhao, Nagi N. Mansour +1
Far-side images of solar active regions have become one of the routine products of helioseismic observations, and are of importance for space weather forecasting by allowing the de…
Influence of Non-Uniform Distribution of Acoustic Wavefield Strength on Time-Distance Helioseismology Measurements
Konstantin V. Parchevsky, Junwei Zhao, Alexander G. Kosovichev
By analyzing numerically simulated solar oscillation data, we study the influence of non-uniform distribution of acoustic wave amplitude, acoustic source strength, and perturbation…
Speed of Meridional Flows and Magnetic Flux Transport on the Sun
M. Svanda, A. G. Kosovichev, J. Zhao
We use the magnetic butterfly diagram to determine the speed of the magnetic flux transport on the solar surface towards the poles. The manifestation of the flux transport is clear…
Initial Helioseismic Observations by Hinode/SOT
Takashi Sekii, Alexander G. Kosovichev, Junwei Zhao +12
Results from initial helioseismic observations by Solar Optical Telescope onboard Hinode are reported. It has been demonstrated that intensity oscillation data from Broadband Filte…
Time-Distance Imaging of Solar Far-Side Active Regions
Junwei Zhao
It is of great importance to monitor large solar active regions in the far-side of the Sun for space weather forecast, in particular, to predict their appearance before they rotate…