Multi-component Decomposition of Astronomical Spectra by Compressed Sensing

Mark C. M. Cheung, Bart De Pontieu, Juan Martínez-Sykora, Paola Testa, Amy R. Winebarger, Adrian Daw, Viggo Hansteen, Patrick Antolin, Theodore D. Tarbell, Jean-Pierre Wuelser, Peter R. Young

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3 Citations (Scopus)
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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).
Original languageEnglish
Article number13
JournalThe Astrophysical Journal
Volume882
Issue number1
Early online date27 Aug 2019
DOIs
Publication statusPublished - 1 Sep 2019
Externally publishedYes

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