pPXF: Penalized Pixel-Fitting stellar kinematics extraction

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pPXF: Penalized Pixel-Fitting stellar kinematics extraction

Post by owlice » Mon Oct 08, 2012 3:49 pm

pPXF: Penalized Pixel-Fitting stellar kinematics extraction

Abstract: 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:

<ul><li>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.</li><li>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.</li><li>Iterative sigma clipping: To clean the spectra from residual bad pixels or cosmic rays.</li><li>Additive/multiplicative polynomials: To correct low frequency continuum variations. Also useful for calibration purposes.</li></ul>

The code is available in IDL and in Python versions.

Credit: Cappellari, Michele

Site: https://www-astro.physics.ox.ac.uk/~mxc/software/#ppxf
https://ui.adsabs.harvard.edu/abs/2017MNRAS.466..798C

Bibcode: 2012ascl.soft10002C

Preferred citation method: https://ui.adsabs.harvard.edu/abs/2017MNRAS.466..798C; also cite https://ui.adsabs.harvard.edu/abs/2010MNRAS.404.1639V if using MILES, or https://ui.adsabs.harvard.edu/abs/2006MNRAS.366.1151S if using GANDALF with pPXF

ID: ascl:1210.002
Last edited by Ada Coda on Sun Nov 01, 2020 3:55 pm, edited 1 time in total.
Reason: Updated code entry.
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