Conveners
Poster Session 7.1
- Jasmina Magdalenic (Royal Observatory of Belgium)
The Doppler velocities observed in the solar photosphere are known to show significant center-to-limb variation. The convective blueshifts observed near the disk center decrease toward the limb and they turn into redshifts, which is called the limb effect. This is produced by the projection of the 3D atmospheric structure along the line of sight. The previous studies using ground-based...
The Metis coronagraph, on board the Solar Orbiter (SolO) mission, records full-Sun images of the solar corona in ultraviolet and in polarized visible brightness (pB). The range of heliocentric heights covered by the field of view (FoV) of Metis changes as a function of the SolO position along its highly eccentric orbit. For its maximum aphelion distance ($\approx 1~\text{au}$) the radial FoV...
Using Atacama Large Millimeter/submillimeter Array (ALMA) observations of the quiet Sun at 1.26 and 3 mm, we study spatially resolved oscillations and transient brightenings, i.e. small, weak events of energy release. Both phenomena may have a bearing on the heating of the chromosphere. At 1.26 mm, in addition to power spectra of the original data, we degraded the images to the spatial...
Fan-shaped jets can be observed above light bridges and are driven by reconnection of the vertical umbral field with the more horizontal field above the light bridges. Because these jets are not fully opaque in chromospheric lines, one cannot study their spectra without the highly complex considerations of radiative transfer in spectral lines from the atmosphere behind the fan.
We take...
Heat fluxes from Type II spicules into the surrounding corona as a possible source of corona heating are determined. We have shown that in order to compensate for radiation and thermal conduction losses, approximately 10^4 hot Type-II spicules are required, which is about 1% of the number of spicules simultaneously observed on the solar disk. The main driver for coronal heating is the...
Light bridges (LBs) are elongated and bright structures that seem to be related to the formation and evolution of sunspots. In this contribution, we present the results of long-term evolution of different atmospheric parameters of three LBs formed in the same host sunspot by different mechanisms. We have used data taken with the GREGOR Infrared Spectrograph installed at the GREGOR telescope....
Energy transport through thermal conductivity is an important mechanism in the solar corona. Here we report on the implementation of thermal conductivity into the MANCHA code, which allows its extension to corona. Conductivity is frequently modeled with the expression deduced by Spitzer in the limit of the strong magnetic field which restricts the effects to the corona. However, for an...
