Search Publications
Dampening long-period doppler shift oscillations using deep machine learning techniques in the solar network and internetwork
Tavabi, Ehsan; Sadeghi, Rayhaneh
This study aimed to explore the Doppler shift at different wavelengths in the IRIS solar spectrum and analyze the evolution and statistical properties of longitudinal oscillations with damping in chromosphere and transition region bright points (BPs). Understanding the damping mechanism and statistical properties of oscillations in BPs is crucial …
Where is the base of the Transition Region? Evidence from TRACE, SDO, IRIS and ALMA observations
Alissandrakis, Costas E.
Classic solar atmospheric models put the Chromosphere-Corona Transition Region (CCTR) at ∼ 2 Mm above the τ5000 = 1 level, whereas radiative MHD (rMHD) models place the CCTR in a wider range of heights. However, observational verification is scarce. In this work we review and discuss recent results from various instruments and spectral …
Coronal spectroscopy: Probing sources of slow solar wind in active regions, and the early phases of solar flares
Harra, Louise K.
Coronal spectroscopy has pushed forward the understanding of physical processes in all phenomena on the Sun. In this review we concentrate specifically on plasma parameters measured in sources of the slow solar wind in active regions and the early phases of solar flares. These topics are a key part of the science goals of the Solar Orbiter mission…
Solar jets observed with the Interface Region Imaging Spectrograph (IRIS)
Schmieder, Brigitte; Joshi, Reetika; Chandra, Ramesh
Solar jets are impulsive, collimated plasma ejections that are triggered by magnetic reconnection. They are observed for many decades in various temperatures and wavelengths, therefore their kinematic characteristics, such as velocity and recurrence, have been extensively studied. Nevertheless, the high spatial resolution of the Interface Region I…
First solar observations with ALMA
Loukitcheva, Maria
The Atacama Large Millimeter-Submillimeter Array (ALMA) has opened a new window for studying the Sun via high-resolution high-sensitivity imaging at millimeter wavelengths. In this contribution I review the capabilities of the instrument for solar observing and describe the extensive effort taken to bring the possibility of solar observing with AL…
The dynamic chromosphere: Pushing the boundaries of observations and models
Pereira, Tiago M. D.
The interface between the bright solar surface and the million-degree corona continues to hold the key to many unsolved problems in solar physics. Advances in instrumentation now allow us to observe the dynamic structures of the solar chromosphere down to less than 0.″1 with cadences of just a few seconds and in multiple pola…