Author: Peter LeitnerSmall granules that do not originate from the fragmentation process of regular sized granular cells and evolve on a considerably shorter timescale populate the intergranular lanes. They are found in high-resolution observational a ... more
Author: Sanjay gosainSPRING is an evolving concept for next generation solar synoptic observations network. It is envisaged that the new network will cater to the needs of (i) Helioseismology community, by providing improved resolution Doppler observa ... more
Author: Chris HansonWe compute acoustic Green’s functions in an axisymmetric solar background model, which may include a meridional flow and differential rotation. The wave equation is solved in
the frequency domain using a finite element solver. ... more
Author: Johannes Löhner-BöttcherLARS is an Absolute Reference Spectrograph. It performs fiber-coupled solar observations with the high-resolution Echelle Spectrograph of the Vacuum Tower Telescope (VTT) at the Observatorio del Teide on Tenerife. The scientific i ... more
Author: Vincent BöningWe present the current status of an undergoing validation of a recently developed model for computing spherical Born approximation sensitivity functions for flows. In a first step, power spectra and reference cross-correlations fr ... more
Author: Vincent BöningIn current approaches to time-distance helioseismology, the line-of-sight projection effect on the traveltimes
is not fully taken into account. Furthermore, filtering of full-disc data induces leakage due to the
projection onto ... more
Author: Bogyeong KimThere are many parameters representing the conditions of space environments. Those are modulated in general by Solar Cycle (SC) defined by sunspot number temporal variation. However, all parameters do not have same cyclic features ... more
Author: Christian NuttoThe contribution of acoustic waves to the chromospheric heating is still an open question. To discuss this Issue, it is crucial to understand the propagation of waves from the convection zone, where the waves are excited, into the ... more
Author: Vincent BöningWe extend an existing Born approximation model for calculating the linear sensitivity of helioseismic
travel-times to flows from Cartesian to spherical geometry. This development is necessary to use the
Born approximation for in ... more
Author: Emanuele PapiniStellar acoustic oscillations are affected by magnetic activity, however it is unclear how a single starspot would affect the power spectrum of oscillations. Since the starspot rotates with the star, it causes a perturbation that ... more