Periodic Spectral Modulations Arise from Non-random Spacing of Spectral Absorption Lines

The code in this repository (make_figure.py) reads a synthetic solar spectrum, performs a spectral Fourier transform, and outputs the Figure shown below. It is intended to accompany the paper and allow for reproducible science.

(a): Spectral Fourier Transform of the synthetic solar spectrum by Kurucz (2005). A sliding median with a boxcar width of 3 % (red line) is fitted to the spectral flux (black line). (b): After subtracting the median from the flux, a Lomb-Scargle periodogram is calculated (black). The highest peak coincides with one of the claimed pulse spacings (dashed red). (c): The median-subtracted flux (black) is shown together with the best-fit sine derived from the periodogram. (d): A zoom to show the fit of the sine to the data.

Attribution

Please cite Hippke (2019, PASP in press, ADS, PDF) if you find this code useful in your research. The BibTeX entry for the paper is:

@ARTICLE{2019arXiv190100523H,
       author = {{Hippke}, Michael},
        title = "{Periodic Spectral Modulations Arise from Non-random Spacing of Spectral Absorption Lines}",
      journal = {arXiv e-prints},
     keywords = {Astrophysics - Instrumentation and Methods for Astrophysics},
         year = 2019,
        month = Jan,
          eid = {arXiv:1901.00523},
        pages = {arXiv:1901.00523},
archivePrefix = {arXiv},
       eprint = {1901.00523},
 primaryClass = {astro-ph.IM},
       adsurl = {https://ui.adsabs.harvard.edu/\#abs/2019arXiv190100523H},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

Contributing Code, Bugfixes, or Feedback

I welcome and encourage contributions. If you have any trouble, open an issue.

Copyright 2019 Michael Hippke