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pPXF: Penalized Pixel-Fitting stellar kinematics extraction

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pPXF: Penalized Pixel-Fitting stellar kinematics extraction

Postby owlice » Mon Oct 08, 2012 3:49 pm

pPXF: Penalized Pixel-Fitting stellar kinematics extraction

Abstract: pPXF is an IDL (and free GDL or FL) program which extracts the stellar kinematics or stellar population from absorption-line spectra of galaxies using the Penalized Pixel-Fitting method (pPXF) developed by Cappellari & Emsellem (2004, PASP, 116, 138). Additional features implemented in the pPXF routine include:

  • Optimal template: Fitted together with the kinematics to minimize template-mismatch errors. Also useful to extract gas kinematics or derive emission-corrected line-strengths indexes. One can use synthetic templates to study the stellar population of galaxies via "Full Spectral Fitting" instead of using traditional line-strengths.
  • Regularization of templates weights: To reduce the noise in the recovery of the stellar population parameters and attach a physical meaning to the output weights assigned to the templates in term of the star formation history (SFH) or metallicity distribution of an individual galaxy.
  • Iterative sigma clipping: To clean the spectra from residual bad pixels or cosmic rays.
  • Additive/multiplicative polynomials: To correct low frequency continuum variations. Also useful for calibration purposes.


Credit: Cappellari, Michele

Site: http://www-astro.physics.ox.ac.uk/~mxc/idl/#ppxf
http://adsabs.harvard.edu/abs/2009ApJ...704L..34C

Bibcode: 2012ascl.soft10002C

ID: ascl:1210.002
Last edited by Ada Coda on Sun Dec 30, 2018 8:38 pm, edited 1 time in total.
Reason: Updated code entry.
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