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Multi-component decomposition of astronomical spectra by compressed sensing

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Cheung_2019_ApJ_882_13.pdf (2.335Mb)
Date
01/09/2019
Author
Cheung, Mark C. M.
De Pontieu, Bart
MartÍnez-Sykora, Juan
Testa, Paola
Winebarger, Amy R.
Daw, Adrian
Hansteen, Viggo
Antolin, Patrick
Tarbell, Theodore D.
Wuelser, Jean-Pierre
Young, Peter
the MUSE team
Funder
Science & Technology Facilities Council
Grant ID
ST/R004285/1
Keywords
Instrumentation: spectrographs
Line: profiles
Methods: observational
Sun: corona
Techniques: imaging spectroscopy
QB Astronomy
QC Physics
3rd-DAS
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Abstract
The signal measured by an astronomical spectrometer may be due to radiation from a multi-component mixture of plasmas with a range of physical properties (e.g., temperature, Doppler velocity). Confusion between multiple components may be exacerbated if the spectrometer sensor is illuminated by overlapping spectra dispersed from different slits, with each slit being exposed to radiation from a different portion of an extended astrophysical object. We use a compressed sensing method to robustly retrieve the different components. This method can be adopted for a variety of spectrometer configurations, including single-slit, multi-slit (e.g., the proposed MUlti-slit Solar Explorer mission), and slot spectrometers (which produce overlappograms).
Citation
Cheung , M C M , De Pontieu , B , MartÍnez-Sykora , J , Testa , P , Winebarger , A R , Daw , A , Hansteen , V , Antolin , P , Tarbell , T D , Wuelser , J-P , Young , P & the MUSE team 2019 , ' Multi-component decomposition of astronomical spectra by compressed sensing ' , Astrophysical Journal , vol. 882 , no. 1 , 13 . https://doi.org/10.3847/1538-4357/ab263d
Publication
Astrophysical Journal
Status
Peer reviewed
DOI
https://doi.org/10.3847/1538-4357/ab263d
ISSN
0004-637X
Type
Journal article
Rights
Copyright © 2019. The American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Description
Funding: STFC Ernest Rutherford Fellowship (grant agreement No. ST/R004285/1) (PA).
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  • University of St Andrews Research
URL
http://adsabs.harvard.edu/abs/2019arXiv190203890C
URI
http://hdl.handle.net/10023/18435

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