47 citations · 115 across the 5 of their papers we have counts for
5 papers
Helioseismic Signature of Chromospheric Downflows in Acoustic Travel-Time Measurements from Hinode
Kaori Nagashima, Takashi Sekii, Alexander G. Kosovichev +2
We report on a signature of chromospheric downflows in two emerging-flux regions detected by time-distance helioseismology analysis. We use both chromospheric intensity oscillation…
Signatures of emerging subsurface structures in the sun
T. Hartlep, A. G. Kosovichev, J. Zhao +1
The complex dynamics that lead to the emergence of active regions on the sun are poorly understood. One possibility is that magnetic structures (flux tubes, etc.) rise from below t…
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…
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…