Conveners
Poster Session 6.1
- Etienne Pariat (LESIA, Observatoire de Paris)
The plasma dynamics at frequencies comparable with collisional frequency between various species has to be described in multifluid framework, where collisional interaction between particles is an important ingredient. In our study, we will assume that charged particles are strongly coupled, meaning that they form a single fluid that interacts with neutrals, therefore we will employ a two-fluid...
Field aligned 1-D simulations of coronal loops show that density, temperature, and pressure do not vary much across the coronal loop. Consequently, such quantities averaged over the coronal part of the loop, can be used to characterize the loop's coronal part and its thermodynamic evolution. This is referred to as 0-D description of coronal loops, which provides an efficient method for...
The OI 135.56 nm line and CI 135.58 nm line are weak lines that are covered by NASA's Interface Region Imaging Spectrograph (IRIS) mission which studies how the solar atmosphere is energized. The emission in the OI 135.56 nm line is dominated by a recombination cascade. This line is optically thin and provides powerful diagnostics of unresolved velocity fields in the chromosphere. The CI line...
Electric currents play a very important role in the energy balance of the solar atmosphere as they dissipate the energy stored in the magnetic field. In addition, electric currents can be used as proxies of non-potential magnetic fields, which are prone to produce enhanced chromospheric and coronal activity. Most previous measurements of electric currents have been limited to $j_z$. In this...
Quiescent coronal cavities can provide insight into the solar magnetometry. They are observed in the coronal emission lines, both in polarized and unpolarized light. In the total linear polarization (L/I) they often possess a 'lagomorphic' structure that reflects the underlying magnetic field configuration. We performed analysis of 570 coronal cavities observed between 2012 and 2018 by the...
It is critical to determine the solar disk's radiation in Mg II lines, e.g., to evaluate the radiation incident on solar chromospheric structures such as spicules or prominences, and to comprehend the radiation emitted by these structures in these lines. The aim of this project is to investigate the spatial and temporal variability of the Mg II h&k (2803.53 and 2796.35, respectively) lines in...
The solar chromosphere is critical in our understanding of the solar atmosphere energetics but poses important challenges both in observations and theoretical considerations. From an observational point of view, the number of spectral lines probing this layer are scarce and fall far apart (from UV to NIR). In this same direction, of special interest is the submilimiter continuum, whose...
