First high resolution interferometric observation of a solar prominence with ALMA
Tipo
Artigo
Data de publicação
2022
Periódico
Monthly Notices of the Royal Astronomical Society: Letters
Citações (Scopus)
6
Autores
Labrosse N.
Rodger A.S.
Radziszewski K.
Rudawy P.
Antolin P.
Fletcher L.
Levens P.J.
Peat A.W.
Schmieder B.
Simoes P.J.A.
Rodger A.S.
Radziszewski K.
Rudawy P.
Antolin P.
Fletcher L.
Levens P.J.
Peat A.W.
Schmieder B.
Simoes P.J.A.
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Resumo
© 2022 The Author(s) 2022. Published by Oxford University Press on behalf of Royal Astronomical Society.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.