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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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, Engineering and Medicine > 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:	Date Event 2013 Published
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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