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Category/Subcategory: Natural Sciences/Astronomy

Design of a next generation synoptic solar observing network: solar physics research integrated network group (SPRING)

Author: Markus Roth
Long-term synoptic observations of the Sun in different wavelength regions are essential to understand its secular behavior. Such observations have proven very important for discovery of 11 year solar activity cycle, 22 year magne ... more

Views: 360

Measurement of the VLT pupil motions using a 2 × 2 lenslet evaluated aberrations

Author: Narsireddy Anugu
We present the telescope pupil tracking strategy for the GRAVITY interferometer.

Views: 498

Workshop Report: A New Synoptic Solar Observing Network

Author: Markus Roth
Since all space weather originates in and on the Sun, forecasters need continuous, long-term, consistent, and reliable solar data as a foundation for useful predictions. An effective strategy to obtain nearly continuous solar data ... more

Views: 641


Author: Michael Burton
We present spectral data cubes of the [CI] 809 GHz, 12CO 115 GHz, 13CO 110 GHz, and HI 1.4 GHz line emission from a ∼1 square degree region along the l = 328 (G328) sightline in the Galactic Plane. Emission arises principally ... more

Views: 486

SPRING - Final proposed instrument concept and operation plan

Author: Markus Roth
This document describes the technical concept developed under Solarnet WP80 “Synoptic Observations: Solar Physics Research Integrated Network Group (SPRING)” for the setup of a new ground-based network for continuous solar ... more

Views: 331

Meridional Circulation and Global Solar Oscillations

Author: Markus Roth
We investigate the influence of large-scale meridional circulation on solar p-modes by quasi-degenerate perturbation theory, as proposed by Lavely and Ritzwoller (1992). As an input flow we use various models of stationary meridio ... more

Views: 591

Experimental results for infrared aberration tracking using a correlation algorithm on two star extended field

Author: Narsireddy Anugu
We report an experimental results of different correlation algorithms for an extended source wavefront sensor.

Views: 528

The Importance of Long-term Synoptic Observations and Data Sets for Solar Physics and Helioseismology

Author: Markus Roth
A casual single glance at the Sun would not lead an observer to conclude that it varies. The discovery of the 11-year sunspot cycle was only made possible through systematic daily observations of the Sun over 150 years and even to ... more

Views: 544

Inversions for Deep Solar Meridional Flow Using Spherical Born Kernels

Author: Vincent Böning
The solar meridional flow is a crucial ingredient in modern dynamo theory. Seismic estimates of this flow have, however, been contradictory in deeper layers below about $0.9\,R_\odot$. Results from time-distance helioseismology h ... more

Views: 1046