191 citations · 522 across the 13 of their papers we have counts for
13 papers
An improved multi-ridge fitting method for ring-diagram helioseismic analysis
Kaori Nagashima, Aaron C. Birch, Jesper Schou +2
Context: There is a wide discrepancy in current estimates of the strength of convection flows in the solar interior obtained using different helioseismic methods applied to observa…
Probing sunspots with two-skip time-distance helioseismology
T. L. Duvall, P. S. Cally, D. Przybylski +2
Previous helioseismology of sunspots has been sensitive to both the structural and magnetic aspects of sunspot structure. We aim to develop a technique that is insensitive to the m…
The amplitude of the cross-covariance function of solar oscillations as a diagnostic tool for wave attenuation and geometrical spreading
Kaori Nagashima, Damien Fournier, Aaron C. Birch +1
Context. In time-distance helioseismology, wave travel times are measured from the two-point cross-covariance function of solar oscillations and are used to image the solar convect…
Magnetic Properties of Solar Active Regions that Govern Large Solar Flares and Eruptions
Shin Toriumi, Carolus J. Schrijver, Louise K. Harra +2
Solar flares and coronal mass ejections (CMEs), especially the larger ones, emanate from active regions (ARs). With the aim to understand the magnetic properties that govern such f…
Statistics of the two-point cross-covariance function of solar oscillations
Kaori Nagashima, Takashi Sekii, Laurent Gizon +1
Context: The cross-covariance of solar oscillations observed at pairs of points on the solar surface is a fundamental ingredient in time-distance helioseismology. Wave travel times…
Interpreting the Helioseismic and Magnetic Imager (HMI) Multi-Height Velocity Measurements
Kaori Nagashima, Björn Löptien, Laurent Gizon +6
The Solar Dynamics Observatory/Helioseismic and Magnetic Imager (SDO/HMI) filtergrams, taken at six wavelengths around the Fe I 6173.3 Å line, contain information about the line-of…