IRIS-6: The Chromosphere

Session

Session 6

22 Jun 2016, 14:15

FR4 (AlbaNova University Centre)

271. Multi-fluid effects in the solar atmosphere (Invited)

Manuel Collados (Instituto de Astrofisica de Canarias)

22/06/2016, 14:15

The deepest layers of the solar atmosphere are only partially ionised. As a result, the presence of neutrals cannot be neglected and they can influence magnetic structures in various aspects. Neutrals do not feel directly the effects of the Lorentz force and are only sensitive to it through collisions with charged particles. The net effect is that these collisions have an impact...

308. Observational consequences of ion-neutral effects in the low solar atmosphere

Juan Martinez-Sykora (BAERI)

22/06/2016, 14:45

The complexity of the chromosphere is due to various regime changes that take place across it. Consequently, the interpretation of chromospheric observations is a challenging task. It is thus crucial to combine these observations with advanced radiative-MHD numerical modeling. Because the photosphere, chromosphere and transition region are partially ionized, the interaction between...

316. Emergence of granular-sized magnetic bubbles through the solar atmosphere: the path to the transition region

V. Hansteen

22/06/2016, 15:05

We study the ascent of granular-sized magnetic bubbles from the solar photosphere through the chromosphere into the transition region and above, for the first time. Such events occurred in a flux emerging region in NOAA 11850 on September 25, 2013. During that time, the first co-observing campaign between the Swedish 1-m Solar Telescope and the IRIS spacecraft was carried out. Simultaneous...

283. Spectral signatures of spicules in the IRIS channels: observations and preliminary modeling.

Costas Alissandrakis (University of Ioannina)

22/06/2016, 15:25

IRIS observations of chromospheric and CCTR lines, with their unique spatial and temporal capabilities, allow for a complete diagnostic of the highly dynamical spicules from their cool roots to their expansion and disappearance into the corona. We analyzed both spectral and slit-jaw observations near the south pole of the sun, with the slit perpendicular to the limb. Here we will present...

280. Small scale chromospheric fibrils observed by SUNRISE 2

Ricardo Gafeira (Max Planck Institute for Solar System Research)

22/06/2016, 15:45

The balloon-borne SUNRISE observatory allows obtaining observations in the UV with unprecedented temporal stability and spatial resolution. During its second scientific flight the Sunrise Filter Imager (SUFI) was used to record a time series of narrow-band intensity images in the Ca II H line lasting for approximately one hour at a cadence of 7 seconds. This unique data set enabled us to...