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"How to be a connoiseur of stellar light curves" or Criteria for reliable frequency extraction of pulsating stars observations

Pascual-Granado, Javier; García Hernández, Antonio; Álvarez Martínez, Sergio


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  <dc:creator>Pascual-Granado, Javier</dc:creator>
  <dc:creator>García Hernández, Antonio</dc:creator>
  <dc:creator>Álvarez Martínez, Sergio</dc:creator>
  <dc:date>2021-10-11</dc:date>
  <dc:description>It is clear that for the identification of pulsation modes a necessary first step is the unambiguous detection and extraction of frequencies from observations. It is no less clear that this task is arduous and full of obstacles. To name just a few: irregular sampling introduce correlation between frequency bins in the periodogram; noise level cannot be estimated properly when the statistical properties deviate from a uncorrelated stochastic process with Gaussian distribution; the false alarm test, which is based on a proper estimation of the noise level, also suffer from biases due to assumptions like an exponentially distributed noise; different fitting methods produce different results, etc. Here I will discuss some of these issues and introduce an ambitious project aimed to formalize a set of consistent criteria for a reliable frequency extraction in pulsating stars observations. This will produce a living recipe with the purpose of serving as a reference for the present and future data analysts of the ultra-precise observations gathered by asteroseismic space missions. That is, the necessary criteria to be a connoisseur of stellar light curves and identify pulsation modes with seismic models.</dc:description>
  <dc:identifier>https://zenodo.org/record/5562498</dc:identifier>
  <dc:identifier>10.5281/zenodo.5562498</dc:identifier>
  <dc:identifier>oai:zenodo.org:5562498</dc:identifier>
  <dc:relation>doi:10.5281/zenodo.5562497</dc:relation>
  <dc:relation>url:https://zenodo.org/communities/plato2021</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>https://creativecommons.org/licenses/by/4.0/legalcode</dc:rights>
  <dc:subject>data analysis</dc:subject>
  <dc:subject>stars: oscillations</dc:subject>
  <dc:subject>methods: statistical</dc:subject>
  <dc:title>"How to be a connoiseur of stellar light curves" or Criteria for reliable frequency extraction of pulsating stars observations</dc:title>
  <dc:type>info:eu-repo/semantics/lecture</dc:type>
  <dc:type>presentation</dc:type>
</oai_dc:dc>
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