Multi-component Decomposition of Astronomical Spectra by Compressed Sensing

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 and Young, Peter (2019) Multi-component Decomposition of Astronomical Spectra by Compressed Sensing. The Astrophysical Journal, 882 (1). p. 13. ISSN 0004-637X

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Official URL: https://doi.org/10.3847/1538-4357/ab263d

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).

Item Type: Article
Uncontrolled Keywords: instrumentation: spectrographs; line: profiles; methods: observational; Sun: corona; techniques: imaging spectroscopy
Subjects: F300 Physics
F500 Astronomy
Depositing User: Elena Carlaw
Date Deposited: 12 Sep 2019 13:30
Last Modified: 11 Oct 2019 13:04
URI: http://nrl.northumbria.ac.uk/id/eprint/40662

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