AUTHOR=Heinzel Petr , Bárta Miroslav , Gunár Stanislav , Labrosse Nicolas , Vial Jean-Claude 

TITLE=Prominence observations with ALMA

JOURNAL=Frontiers in Astronomy and Space Sciences

VOLUME=Volume 9 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2022.983707

DOI=10.3389/fspas.2022.983707

ISSN=2296-987X

ABSTRACT=We review past prominence observations in the mm/sub-mm radio domain
and summarize the basic physics behind the formation of such continua
under the prominence conditions. Prior to ALMA observations, simulations
of the prominence/filament visibility in mm/sub-mm bands were
performed using specific models and assumptions and we review this
effort here. A core part of the review is the description and analysis
of the first ALMA observations of a quiescent prominence, focusing on
various physical as well as geometrical (like the importance of the
PoS filling factor) aspects. It is first time when the prominence was
observed in the mm domain with a spatial resolution as high as 1-2
arcsec, comparable to ground-based coronagraphic observations in the
hydrogen H$\alpha$ line, and we demonstrate why the fine structures
in both ALMA Band 3 and H$\alpha$ images are quite similar. Finally, we
briefly discuss future prospects of ALMA prominence observations,
to be coordinated with optical and UV spectra and images.