Results 101 to 110 of about 860 (219)

Imaging Spectropolarimeter for the Multi-Application Solar Telescope at Udaipur Solar Observatory: Characterization of Polarimeter and Preliminary Observations

, 2017
The Multi-Application Solar Telescope (MAST) is a 50 cm off-axis Gregorian telescope that has recently become operational at the Udaipur Solar Observatory (USO).
Alok Ranjan Tiwary, Shibu K. Mathew, Tiwary, Alok Ranjan, Venkatakrishnan, P., A. Raja Bayanna, Bayanna, A. Raja, P. Venkatakrishnan, Rahul Yadav, Mathew, Shibu K., Yadav, Rahul   +9 more
core   +1 more source

Near- and Mid-ultraviolet Observations of X-6.3 Flare on 2024 February 22 Recorded by the Solar Ultraviolet Imaging Telescope on board Aditya-L1

The Astrophysical Journal Letters
Solar flares are regularly observed in extreme-ultraviolet soft X-rays (SXRs) and hard X-rays (HXRs). However, those in near- and mid-ultraviolet are sparse.
Soumya Roy, Durgesh Tripathi, Sreejith Padinhatteeri, A. N. Ramaprakash, Abhilash R. Sarwade, Nived V. N., Janmejoy Sarkar, Rahul Gopalakrishnan, Rushikesh Deogaonkar, K. Sankarasubramanian, Sami K. Solanki, Dibyendu Nandy, Dipankar Banerjee   +12 more
doaj   +1 more source

Dynamics of fine structure in the solar chromosphere

, 2006
This thesis is concerned with the dynamics of fine structure of the solar chromosphere and transition region, in both quiet sun and active regions. It contains six chapters of observational studies.
Wijn, A.G. de
core  

Investigating magnetic fields in the solar chromosphere

, 2020
Solar plage has been the topic of many studies since its initial description in the mid 19th century, but as of yet it has not been understood to the point where we can reproduce all aspects of these active regions in quasi-realistic numerical models. To
Pietrow, Alexander
core  

On the Intermittency of Hot Plasma Loops in the Solar Corona

The Astrophysical Journal
A recent analysis has suggested that the heating of plasma loops in the solar corona depends not just on the Poynting flux but also on processes yet to be identified.
Philip G. Judge, N. Paul M. Kuin
doaj   +1 more source

The Relationships among Solar Flare Impulsiveness, Energy Release, and Ribbon Development

The Astrophysical Journal
We develop the impulsiveness index, a new classification system for solar flares using the Solar Dynamics Observatory/Extreme Ultraviolet Experiment 304 Å Sun-as-a-star light curves.
Cole A. Tamburri, Maria D. Kazachenko, Adam F. Kowalski   +2 more
doaj   +1 more source

The investigation of quasi-separatrix layers in solar magnetic fields

, 2011
The structure of the magnetic field is often an important factor in many energetic processes in the solar corona. To determine the topology of the magnetic field features such as null points, separatrix surfaces, and separators must be found.
Restante, Anna Lisa
core  

Investigating the Effects of Atmospheric Stratification on Coronal Active Region Field Modeling

The Astrophysical Journal
Understanding the evolution of the complex magnetic fields found in solar active regions is an active area of research. There exist many different models for such fields, which range in their complexity due to the number of physical effects included in ...
Oliver Rice, Christopher Prior
doaj   +1 more source

ALMA observations of transient heating in a solar active region

, 2020
Aims. We aim to investigate the temperature enhancements and formation heights of solar active-region brightenings such as Ellerman bombs (EBs), ultraviolet bursts (UVBs), and flaring active-region fibrils (FAFs) using interferometric observations in the
G. J. M. Vissers, Vissers, Gregal Joan Maria, J. Leenaarts, J. de la Cruz Rodríguez, da Silva Santos, João Manuel, de la Cruz Rodriguez, Jaime, J. M. da Silva Santos, S. M. White, White, S. M., Leenaarts, Jorrit, V. H. Hansteen, Hansteen, Viggo   +11 more
core   +1 more source

A Data-constrained Analysis for Joule Heating as a Solar Active Region Atmosphere Heating Mechanism. I. Sunspot Umbral Light Bridge

The Astrophysical Journal
Understanding the mechanisms underlying the heating of the solar atmosphere is a fundamental problem in solar physics. The lower atmosphere of the Sun (i.e., photosphere and chromosphere) is composed of weakly ionized plasma.
M. S. Yalim, M. Frisse, C. Beck, D. P. Choudhary, A. Prasad, S. S. Nayak, G. P. Zank   +6 more
doaj   +1 more source