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Astrophysics and Astrononmy
Ongoing work on post focus instrumentation with IBIS 2.0
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
24.02.2021
Co-author:
G. Viavattene (1), I. Ermolli (1), R. Cirami (2), G. Calderone (2), D. Del Moro (3), P. Romano (4), I. Coretti (2), F. Giorgi (1 ), V. Baldini (2), P. Di Marcantonio (2), L. Giovannelli (3), S. L. Guglielmino (4), M. Murabito (1), M. Oliviero (5), F. Pedichini (1), R. Piazzesi (1), M. Aliverti (6), E. M. Redaelli (6), F. Berrilli (3), F. Zuccarello (7)
Abstract:
The Interferometric BIdimensional Spectrometer IBIS, which operated until 2019 at the Dunn Solar Telescope, is undergoing a hardware and software revision that will allow soon to perform new measurements of the magnetic and velocity fields in solar atmosphere at high spatial, spectral and temporal resolution. We present the opto-mechanical layout and control system for the new instrument, called IBIS 2.0, which have been developed to interface it to the Vacuum Tower Telescope, and describe future steps.
Solar image enhancement and quality assessment with deep learning
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
21.04.2021
Co-author:
A. Veronig, W. Pötzi, T. Podladchikova
Abstract:
We present an overview of our recent advances of solar image enhancement and quality assessment with deep learning methods.
Big Data Storage in Solar Physics -- The KIS Science Data Centre case
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
17.12.2020
Co-author:
Peter Caligari, Petri Kehusmaa and Nazaret Bello González
Abstract:
We present the plans of the KIS Science Data Centre to manage ground-based solar data volumes in the era of the DKIST and EST telescopes
The data processing pipeline at Kanzelhöhe Observatory
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
19.02.2021
Co-author:
A. Veronig, R. Jarolim, J. M. Rodriguez Gomez, T. Podladchikova
Abstract:
The complete dataprocessing at Kanzelhöhe for H-alpha/CaIIK and Whitelight is presented from image capture to WWW.
Recent advances of INAF small telescopes for synoptic observations
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
22.02.2021
Co-author:
P. Costa, I. Ermolli, F. Giorgi, S.L. Guglielmino, M. Murabito, M. Oliviero, G. Viavattene
Abstract:
We describe the ongoing upgrade of the INAF small telescopes providing full-disc observations at various bands of the visible spectrum of the Sun, specifically of the Catania, Rome-PSPT, and VAMOS telescopes. The acquisition system of the former has been updated to provide observations in the Hα line with pixel scale of 1” and cadence up to 24 images per sec, whose quality and format allow easy exploitation of the Lucky-imaging and flare detection techniques developed within the SPRING project. The update of the control system of the PSPT is also under study to ensure the continuation of the time series of Ca II K and continuum observations started 25 years ago. Finally, the opto-mechanical layout of the VAMOS telescope has been revised to improve the spatial resolution of the Dopplergrams, magnetograms, and intensity images obtained with potassium MOF cells at a 25 cm aperture telescope.
A Small Aperture Synoptic Solar Telescope - Baseline Design
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
08.03.2021
Abstract:
Design considerations for a small full disk telescope with a Fabry Pérot interferometer in front
Forum 2020 + Trans-National Access Programme
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
16.12.2020
Abstract:
Introduction to the Forum plus a presentation of the SOLARNET Trans-National Access Programme
2nd SPRING Progress Meeting – WP8
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
02.03.2021
Abstract:
In this presentation I give an overview on the SOLARNET WP8 workpackage SPRING and its current status. Furthermore, the objectives of the meeting are presented.
Generalized Fluid Models of the Braginskii-type | Peter Hunana
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
23.06.2022
Abstract:
Several generalizations of the well-known fluid model of Braginskii (Rev. of Plasma Phys., 1965) are considered. We use the Landau collisional operator and the moment method of Grad. We focus on the 21-moment model that is analogous to the Braginskii model, and we also consider a 22-moment model. Both models are formulated for general multi-species plasmas with arbitrary masses and temperatures, where all the fluid moments are described by their evolution equations. The 21-moment model contains two “heat flux vectors” (3rd and 5th-order moments) and two “viscosity-tensors” (2nd and 4th-order moments). The Braginskii model is then obtained as a particular case of a one ion-electron plasma with similar temperatures, with de-coupled heat fluxes and viscosity-tensors expressed in a quasi-static approximation. See more at https://espos.stream/2022/06/23/Hunana/ .
The Solar Physics Research Integrated Network Group - SPRING
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
19.10.2021
Co-author:
SOLARNET WP8 participants
Abstract:
Large, high-resolution solar telescopes admit only a small field of view. However, context data showing the big picture of the dynamics and magnetism at different heights of the solar atmosphere are equally important to understand the Sun in general. Real-time information about the variation of surface velocity, magnetic field, and intensity at different solar layers is an essential input to fundamental solar physics and space weather prediction. There is a consensus that a worldwide distributed network of a suite of small, dedicated telescopes which observe the entire solar disk is needed to obtain these data on a continuous basis.
In this talk, I will report about the current status of designing such a network SPRING which is currently developed under SOLARNET (High-resolution Solar Physics Network). The key scientific products of this facility will be arc-second resolution images of the Sun in various wavelengths, synoptic vector magnetic fields, synoptic surface velocity fields wit
A New Instrument for Synoptic Space Weather Observation
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
25.09.2023
Co-author:
Francesco Berrilli, Stuart M. Jefferies, Neil Murphy
Abstract:
We can deduce the magnetic and dynamic status of the Sun and its possible dependence on the magnetic cycle using continuous, multi-height observations of the solar atmosphere. Wwe describe the design and construction of a multi-nodal synoptic telescope network to observe the entire disk of the Sun. This network currently comprises of two instruments: the Tor Vergata Solar Synoptic Telescope (TSST) under construction at Università degli Studi di Roma Tor Vergata, to be mounted in La Palma, Canary Islands, Spain, and the Mojave Solar Observatory (MSO) located in Apple Valley California. This presentation focuses on the technical developments of the observatories themselves: the optical design of MOF-based telescopes, the mounting and enclosure of the TSST, the technological development of He-based MOFs, and the observing plan for the future of the multi-nodal network. Additionally, we present preliminary Doppler- and magnetogram observations from MSO.
Maximal growth rate of the ascending phase of a sunspot cycle for predicting its amplitude
Natural Sciences (Astrophysics and Astrononmy)
Date of upload:
22.09.2023
Co-author:
Shantanu Jain, Astrid Veronig, Werner Pötzi, Frédéric Clette, Olga Sutyrina, Mateja Dumbovic
Abstract:
Forecasting the solar cycle amplitude is important for many space weather applications. We demonstrate a steady relationship between the maximal growth rate of sunspot activity in the cycle ascending phase and the subsequent cycle amplitude using four data sets of solar activity indices: total sunspot numbers, hemispheric sunspot numbers from the new catalogue, total sunspot areas, and hemispheric sunspot areas. For all the data sets, a linear regression based on the maximal growth rate precursor shows a significant correlation. Validation of predictions for cycles 1-24 shows high correlations between the true and predicted cycle amplitudes reaching r = 0.93 for the total sunspot numbers. Furthermore, our findings provide a strong foundation for supporting regular monitoring, recording, and predictions of solar activity with hemispheric sunspot data, which capture the asymmetric behaviour of the solar activity and solar magnetic field and enhance solar cycle prediction methods.
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