Line profiles and intensity ratios in prominence models with a prominence to corona interface

Labrosse, N., Gouttebroze, P., Heinzel, P. and Vial, J.-C. (2002) Line profiles and intensity ratios in prominence models with a prominence to corona interface. In: Wilson, A. (ed.) Solar Variability: From Core to Outer Frontiers, 10th European Solar Physics Meeting, 9-14 September 2002, Prague, Czech Republic. Series: ESA Special Publication (506). ESA Publications Division: Noordwijk, The Netherlands, pp. 451-454. ISBN 9789290928164

Abstract

In this work we study the hydrogen, helium and calcium spectra emitted by a one-dimensional prominence model in magneto-hydrostatic equilibrium. The prominence slab consists of two parts: a cool core where the plasma is optically thick for some lines, and a prominence-to-corona transition region (PCTR) with a strong temperature gradient. The models are defined by 5 parameters: temperature, pressure, slab thickness, microturbulent velocity and altitude. We solve the NLTE radiative transfer equations for all optically thick transitions. We present line ratios between infrared, optical and EUV lines, as well as line profiles. We show that the presence of a PCTR, where both collisional and radiative excitations are important, affects H, He, and Ca populations and emergent lines in different manners.

• Item Type: Book Sections
• Keywords: Sun - prominences, radiative transfer, line - profiles, line - formation
• Status: Published
• Refereed: No
• Glasgow Author(s) Enlighten ID: Labrosse, Dr Nicolas
• Authors: Labrosse, N., Gouttebroze, P., Heinzel, P., and Vial, J.-C.
• Subjects: Q Science > QB Astronomy
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Publisher: ESA Publications Division
• ISBN: 9789290928164
• Copyright Holders: Copyright © 2002 ESA Publications
• Publisher Policy: Reproduced with the permission of the publisher.