Multi-component decomposition of astronomical spectra by compressed sensing
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
ISSN
0004-637XType
Journal article
Description
Funding: STFC Ernest Rutherford Fellowship (grant agreement No. ST/R004285/1) (PA).Collections
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