Solar Orbiter - IRIS - ADITYA - Joint Workshop

A-3.06 - Non-Gaussian line profiles in IRIS full-disk Si IV observations, and where to find them

Not scheduled

15m

Harnack Haus (Berlin)

Poster Poster A

Speaker

Paola Testa (Harvard Smithsonian Center for Astrophysics)

Description

First Name: Paola
Last Name: Testa
Affiliation: Harvard Smithsonian Center for Astrophysics

All Authors: Paola Testa, Bart De Pontieu, Tom Ayres

Abstract: Spectral observations of the transition region emission in the solar corona with the Interface Region Imaging Spectrograph (IRIS) at high spatial and spectral resolution reveal that a non-negligible portion of these line profiles are non-Gaussian (e.g., Dudik et al. 2017, Ayres et al. 2021). The presence of non-Gaussian profiles at the fine spatial resolution of IRIS provides constraints on the possible origin of such line profiles (e.g., k-distribution), and on the spatial properties of such phenomena. Here we present a follow-up of the study of IRIS full-disk mosaics by Ayres et al. (2021). We focus on the strong transition region Si IV 1393A line, and we investigate in further detail the relation between solar features and the transition region spectral profiles, through the use of SDO and Hinode observations coordinated with these IRIS datasets.