Category/Subcategory: Natural Sciences/Physics
Temporal variations of Solar and Interplanetary conditions for the last 4 decades
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 Views: 581
Modelling the Line-of-Sight Projection and Filtering-Induced Leakage in Time-Distance Helioseismology
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 Views: 466
Accurate numerical solutions to the forward problem of local helioseismology
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 Views: 4173
Validating Spherical Born Kernels for Meridional Flows
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 Views: 477
High-resolution modeling of the solar photosphere with the ANTARES RHD-code
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 Views: 707
Asteroseismic signature of a starspot
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 Views: 343
Exploitation of Space Data for Innovative Helio- and Asteroseismology - SpaceInn
Author: Markus RothThe European Helio- and Asteroseismology Network (HELAS) has initiated the follow-up project "SpaceInn - Exploitation of Space Data for Innovative Helio- and Asteroseismolgoy" with the mission to build on the existing European str ... more Views: 596
LARS – the Laser Absolute Reference Spectrograph at the VTT
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 Views: 560
Statistical investigation of CMEs properties and their correlation with flares during Solar Cycle 23 and 24.
Author: compagnino antonio alessioThe Large Angle Spectrometric Coronagraph (LASCO), onboard the Solar and Heliospheric Observatory (SOHO) provided us observations extending for the two Solar Cycles 23 and 24 (31 July 1996 - 31 March 2014) that allow one to compar ... more Views: 17
Spherical Born Kernels for Flows in Time-Distance Helioseismology
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 Views: 484