Category/Subcategory: Natural Sciences/Physics
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: 632
Solar Physics Research Integrated Network Group (SPRING) : A Next Generation Ground-based Synoptic Network
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 Views: 523
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: 4153
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: 340
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: 456
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: 436
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: 557
Numerical simulations of magneto-acoustic wave propagation from the upper convection zone into the chromosphere.
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 Views: 437
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: 454
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: 325