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Low-degree multi-spectral p-mode fitting

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Howe, R. (Rachel), Broomhall, Anne-Marie, Chaplin, William James, Elsworth, Yvonne and Jain, K. (2013) Low-degree multi-spectral p-mode fitting. Journal of Physics: Conference Series, Volume 440 . Article number 012011. doi:10.1088/1742-6596/440/1/012011

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Official URL: http://dx.doi.org/10.1088/1742-6596/440/1/012011

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Abstract

We combine unresolved-Sun velocity and intensity observations at multiple wavelengths from the Helioseismic and Magnetic Imager and Atmospheric Imaging Array onboard the Solar Dynamics Observatory to investigate the possibility of multi-spectral mode-frequency estimation at low spherical harmonic degree. We test a simple multi-spectral algorithm using a common line width and frequency for each mode and a separate amplitude, background and asymmetry parameter, and compare the results with those from fits to the individual spectra. The preliminary results suggest that this approach may provide a more stable fit than using the observables separately.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Other > Institute of Advanced Study
Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Sun -- Observations, Solar Dynamics Observatory (Spacecraft), Spectrum, Solar, Algorithms
Journal or Publication Title: Journal of Physics: Conference Series
Publisher: Institute of Physics Publishing Ltd.
ISSN: 1742-6596
Official Date: 2013
Dates:
DateEvent
2013Published
Volume: Volume 440
Page Range: Article number 012011
DOI: 10.1088/1742-6596/440/1/012011
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: United States. National Aeronautics and Space Administration (NASA)
Grant number: NNH12AT11I (NASA)

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