This paper describes an adaptation of the Optimally Localized Averaging (OLA) inversion technique, originally developed for geo- and helioseismological...
-
PublicationAn Iterative OLA Method for Inversion of Solar Spectropolarimetric Data. I. Single- and Multiple-variable Inversions of Thermodynamic Quantities
-
PublicationAn Upper Limit on the Temporal Variations of the Solar Interior Stratification
We have analyzed changes in the acoustic oscillation eigenfrequencies measured over the past 7 years by the GONG, MDI, and LOWL instruments. The observations...
-
PublicationAsymptotic g modes: Evidence for a rapid rotation of the solar core
Context. Over the past 40 years, helioseismology has been enormously successful in the study of the solar interior. A shortcoming has been the lack of a...
-
PublicationAtmospheric Extinction Coefficients in the Ic Band for Several Major International Observatories: Results from the BiSON Telescopes, 1984-2016
Over 30 years of solar data have been acquired by the Birmingham Solar Oscillations Network (BiSON), an international network of telescopes used to study...
-
PublicationCan solar g-modes be identified from ground-based velocity measurements
The question of whether or not solar g-modes can be detected and identified from ground observations is addressed. The limitation imposed by the Earth's...
-
TalkCollapsograms: measurement of low signal-to-noise-ratio solar p modes in spatially-resolved helioseismic data
1.- I will give an overview of WeCAPP (Wendelstein Calar Alto Pixellensing Project), a microlensing survey towards the Andromeda galaxy. WeCAPP monitored the...
-
PublicationComparison of parameters of low l solar p-modes at maximum and minimum activity
Velocity measurements of disk integrated sunlight obtained by GOLF experiment aboard SOHO are used to find the parameters of solar p-modes (l
-
PublicationDamping and Excitation Variations of the Solar Acoustic Modes Using LOWL Observations
We have used observations made with the helioseismic instrument LOWL collected over ~6 years to carry out an independent study of the variations of the p-mode...
-
PublicationDependence of sunspot photospheric waves on the depth of the source of solar p-modes
Photospheric waves in sunspots moving radially outward at speeds faster than the characteristic wave velocities have been recently detected. It has been...