ASCL.net

Astrophysics Source Code Library

Making codes discoverable since 1999

ASCL Code Record

[ascl:1210.002] pPXF: Penalized Pixel-Fitting stellar kinematics extraction

pPXF 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.

The code is available in IDL and in Python versions.

Code site:
https://www-astro.physics.ox.ac.uk/~mxc/software/#ppxf
Used in:
https://ui.adsabs.harvard.edu/abs/2009ApJ...704L..34C
Described in:
https://ui.adsabs.harvard.edu/abs/2004PASP..116..138C https://ui.adsabs.harvard.edu/abs/2017MNRAS.466..798C
Bibcode:
2012ascl.soft10002C

Views: 5365

ascl:1210.002
Add this shield to your page
Copy the above HTML to add this shield to your code's website.