ppxf-sew 0.7.1

A method of stellar population synthesis based on ''Equivalent Widths spectrum'', utilizing pPXF for full-spectrum fitting

pPXF-SEW: A full-spectrum fitting method of stellar population Synthesis based on ‘’Equivalent Widths spectrum’’ without attenuation curve prior based on pPXF

Description

This pPXF-SEW package contains a Python implementation of the stellar population Synthesis based on Equivalent Widths spectrum (SEW) method and the Penalized PiXel-Fitting (pPXF) method. It uses full-spectrum fitting with SED to extract stellar and gas kinematics, the stellar population, as well as the dust attenuation curve of stars and galaxies, without a prior attenuation curve. The kinematics are derived from the pPXF method, while the stellar population and attenuation curve are derived from the SEW method.

The SEW method was described in Lu (2025) (in prep.).

The pPXF method was originally described in Cappellari & Emsellem (2004) and was substantially upgraded in subsequent years, particularly in Cappellari (2017).

Installation

Install with:

pip install ppxf-sew

Without write access to the global site-packages directory, use:

pip install --user ppxf-sew

To upgrade to the latest version, use:

pip install --upgrade ppxf-sew

Usage Examples

To learn how to use the pPXF-SEW package, run the examples as Jupyter Notebooks in the ppxf-sew/example directory. It can be found within the main pPXF-SEW package installation folder inside site-packages.

---

License

Other/Proprietary License

Copyright (c) 2024 Jiafeng Lu

This software is provided as is with no warranty. You may use it for non-commercial purposes and modify it for personal or internal use, as long as you include this copyright and disclaimer in all copies. You may not redistribute the code.