First high resolution interferometric observation of a solar prominence with ALMA

Labrosse, N. , Rodger, A. S., Radziszewski, K., Rudawy, P., Antolin, P., Fletcher, L. , Levens, P. J., Peat, A. W., Schmieder, B. and Simões, P. J. A. (2022) First high resolution interferometric observation of a solar prominence with ALMA. Monthly Notices of the Royal Astronomical Society: Letters, 513(1), L30-L34. (doi: 10.1093/mnrasl/slac021)

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Abstract

We present the first observation of a solar prominence at 84 − 116 GHz using the high resolution interferometric imaging of ALMA. Simultaneous observations in Hα from Białkaw Observatory and with SDO/AIA reveal similar prominence morphology to the ALMA observation. The contribution functions of 3 mm and Hα emission are shown to have significant overlap across a range of gas pressures. We estimate the maximum millimetre-continuum optical thickness to be τ3mm ≈ 2, and the brightness temperature from the observed Hα intensity. The brightness temperature measured by ALMA is ∼6000 – 7000 K in the prominence spine, which correlates well with the estimated brightness temperature for a kinetic temperature of 8000 K.

Item Type:Articles
Additional Information:Support from STFC grants ST/T000422/1 (NL, LF), ST/N504075/1 (ASR), ST/K502005/1 (PJL), and ST/S505390/1 (AWP) is gratefully acknowledged. PA acknowledges STFC support from Ernest Rutherford Fellowship grant number ST/R004285/2. PJAS acknowledges support from CNPq (contract 307612/2019-8) and FAPESP (2013/24155-3).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Schmieder, Prof Brigitte and Simoes, Dr Paulo and Fletcher, Professor Lyndsay and RODGER, ANDREW and Peat, Mr Aaron and Labrosse, Dr Nicolas and Levens, Peter
Authors: Labrosse, N., Rodger, A. S., Radziszewski, K., Rudawy, P., Antolin, P., Fletcher, L., Levens, P. J., Peat, A. W., Schmieder, B., and Simões, P. J. A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Monthly Notices of the Royal Astronomical Society: Letters
Publisher:Oxford University Press
ISSN:1745-3925
ISSN (Online):1745-3933
Published Online:07 March 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in Monthly Notices of the Royal Astronomical Society: Letters 513(1): L30-L34
Publisher Policy:Reproduced under a Creative Commons License
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
306515PHAS A&A Group STFC ConsolidatedLyndsay FletcherScience and Technology Facilities Council (STFC)ST/T000422/1P&S - Physics & Astronomy
172031STFC 2015 DTPMartin HendryScience and Technology Facilities Council (STFC)ST/N504075/1P&S - Physics & Astronomy
167203STFC Doctoral Training Grant 2012-17Martin HendryScience and Technology Facilities Council (STFC)ST/K502005/1P&S - Physics & Astronomy
304742STFC Glasgow 2018 DTPMartin HendryScience and Technology Facilities Council (STFC)ST/S505390/1P&S - Physics & Astronomy