dc.date.accessioned | 2021-02-06T20:23:00Z | |
dc.date.available | 2021-02-06T20:23:00Z | |
dc.date.created | 2021-01-14T21:41:36Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Guevara Gomez, Juan Camilo Jafarzadeh, Shahin Wedemeyer, Sven Szydlarski, Mikolaj Marcin Stangalini, M. Fleck, Bernhard Keys, Peter H. . High-frequency oscillations in small chromospheric bright features observed with Atacama Large Millimetre/Submillimetre Array. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2020, 379(2190) | |
dc.identifier.uri | http://hdl.handle.net/10852/82954 | |
dc.description.abstract | We report detection of oscillations in brightness temperature, size and horizontal velocity of three small bright features in the chromosphere of a plage/enhanced-network region. The observations, which were taken with high temporal resolution (i.e. 2 s cadence) with the Atacama large millimetre/ submillimetre array (ALMA) in Band 3 (centred at 3 mm; 100 GHz), exhibit three small-scale features with oscillatory behaviour with different, but overlapping, distributions of period on the order of, on average, 90 ± 22 s, 110 ± 12 s and 66 ± 23 s, respectively. We find anti-correlations between perturbations in brightness, temperature and size of the three features, which suggest the presence of fast sausage-mode waves in these small structures. In addition, the detection of transverse oscillations (although with a larger uncertainty) may also suggest the presence of Alfvénic oscillations which are likely representative of kink waves. This work demonstrates the diagnostic potential of high-cadence observations with ALMA for detecting high-frequency magnetohydrodynamic waves in the solar chromosphere. Such waves can potentially channel a vast amount of energy into the outer atmosphere of the Sun.
This article is part of the Theo Murphy meeting issue ‘High-resolution wave dynamics in the lower solar atmosphere’. | |
dc.language | EN | |
dc.publisher | Royal Society Publishing | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | High-frequency oscillations in small chromospheric bright features observed with Atacama Large Millimetre/Submillimetre Array | |
dc.type | Journal article | |
dc.creator.author | Guevara Gomez, Juan Camilo | |
dc.creator.author | Jafarzadeh, Shahin | |
dc.creator.author | Wedemeyer, Sven | |
dc.creator.author | Szydlarski, Mikolaj Marcin | |
dc.creator.author | Stangalini, M. | |
dc.creator.author | Fleck, Bernhard | |
dc.creator.author | Keys, Peter H. | |
cristin.unitcode | 185,15,3,40 | |
cristin.unitname | Rosseland senter for solfysikk | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1871676 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences&rft.volume=379&rft.spage=&rft.date=2020 | |
dc.identifier.jtitle | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences | |
dc.identifier.volume | 379 | |
dc.identifier.issue | 2190 | |
dc.identifier.pagecount | 15 | |
dc.identifier.doi | https://doi.org/10.1098/rsta.2020.0184 | |
dc.identifier.urn | URN:NBN:no-85757 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 1364-503X | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/82954/1/2008.04179.pdf | |
dc.type.version | AcceptedVersion | |
cristin.articleid | 20200184 | |
dc.relation.project | NFR/262622 | |