On the Visibility of Prominence Fine Structures at Radio Millimeter Wavelengths

0450489 - ASÚ 2016 RIV NL eng J - Journal Article
Heinzel, Petr - Berlicki, Arkadiusz - Bárta, Miroslav - Karlický, Marian - Rudawy, P.
On the Visibility of Prominence Fine Structures at Radio Millimeter Wavelengths.
Solar Physics. Roč. 290, č. 7 (2015), s. 1981-2000. ISSN 0038-0938. E-ISSN 1573-093X
R&D Projects: GA ČR GAP209/12/0906; GA ČR GAP209/12/0103; GA ČR GA13-24782S
Institutional support: RVO:67985815
Keywords : prominences * quiescent * radio emission
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 2.862, year: 2015

The aim of this article is to predict the visibility of prominence fine structures in the submillimeter/millimeter (SMM) domain, to estimate their brightness temperatures at various wavelengths, and to demonstrate the feasibility and usefulness of future high-resolution radio observations of solar prominences with ALMA (Atacama Large Millimeter-submillimeter Array). Our novel approach is the conversion of H coronagraphic images into microwave spectral images. We show that the spatial variations of the prominence brightness both in the H line and in the SMM domain predominantly depend on the line-of-sight emission measure of the cool plasma, which we derive from the integrated intensities of the observed H line. We also describe how we determine the prominence kinetic temperature from SMM spectral images. Finally, we apply the ALMA image-processing software Common Astronomy Software Applications (CASA) to our simulated images to assess what ALMA would detect at a resolution level that is similar to the coronagraphic H images used in this study. Our results can thus help in preparations of first ALMA prominence observations in the frame of science and technical verification tests.
Permanent Link: http://hdl.handle.net/11104/0251797