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Howe, R. (Rachel); Broomhall, Anne-Marie; Chaplin, William James; Elsworth, Yvonne; Jain, K. (2013)
Publisher: Institute of Physics Publishing Ltd.
Languages: English
Types: Article
Subjects: QB

Classified by OpenAIRE into

arxiv: Astrophysics::Solar and Stellar Astrophysics
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.
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    • [1] Fossum A and Carlsson M 2005 Astrophys. J. 625 556-562
    • [2] Howe R, Hill F, Komm R, Broomhall A, Chaplin W J and Elsworth Y 2011 Journal of Physics Conference Series 271 012058-+
    • [3] Norton A A, Graham J P, Ulrich R K, Schou J, Tomczyk S, Liu Y, Lites B W, LĀ“opez Ariste A, Bush R I, Socas-Navarro H and Scherrer P H 2006 Solar Phys. 239 69-91 (Preprint arXiv:astro-ph/0608124)
    • [4] Fleck B, Couvidat S and Straus T 2011 Solar Phys. 271 27-40 (Preprint 1104.5166)
    • [5] Nigam R and Kosovichev A G 1998 Astrophys. J. Lett. 505 L51-54
    • [6] Press W H, Flannery B P and Teukolsky S A 1989 Numerical recipes. The art of scientific computing (FORTRAN Version) (Cambridge University Press)
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